refactor: 重构项目 (#3)

.gitignore

@@ -1,7 +1,30 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
 .DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+# Libraries should not include pubspec.lock, per https://dart.dev/guides/libraries/private-files#pubspeclock.
+/pubspec.lock
+**/doc/api/
 .dart_tool/
-
 .packages
-.pub/
-
 build/

.idea/libraries/Dart_SDK.xml

@@ -1,19 +0,0 @@
-<component name="libraryTable">
-  <library name="Dart SDK">
-    <CLASSES>
-      <root url="file://C:\Tools\flutter/bin/cache/dart-sdk/lib/async" />
-      <root url="file://C:\Tools\flutter/bin/cache/dart-sdk/lib/collection" />
-      <root url="file://C:\Tools\flutter/bin/cache/dart-sdk/lib/convert" />
-      <root url="file://C:\Tools\flutter/bin/cache/dart-sdk/lib/core" />
-      <root url="file://C:\Tools\flutter/bin/cache/dart-sdk/lib/developer" />
-      <root url="file://C:\Tools\flutter/bin/cache/dart-sdk/lib/html" />
-      <root url="file://C:\Tools\flutter/bin/cache/dart-sdk/lib/io" />
-      <root url="file://C:\Tools\flutter/bin/cache/dart-sdk/lib/isolate" />
-      <root url="file://C:\Tools\flutter/bin/cache/dart-sdk/lib/math" />
-      <root url="file://C:\Tools\flutter/bin/cache/dart-sdk/lib/mirrors" />
-      <root url="file://C:\Tools\flutter/bin/cache/dart-sdk/lib/typed_data" />
-    </CLASSES>
-    <JAVADOC />
-    <SOURCES />
-  </library>
-</component>

.idea/modules.xml

@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectModuleManager">
-    <modules>
-      <module fileurl="file://$PROJECT_DIR$/bluetooth_low_energy.iml" filepath="$PROJECT_DIR$/bluetooth_low_energy.iml" />
-      <module fileurl="file://$PROJECT_DIR$/android/bluetooth_low_energy_android.iml" filepath="$PROJECT_DIR$/android/bluetooth_low_energy_android.iml" />
-      <module fileurl="file://$PROJECT_DIR$/example/android/bluetooth_low_energy_example_android.iml" filepath="$PROJECT_DIR$/example/android/bluetooth_low_energy_example_android.iml" />
-    </modules>
-  </component>
-</project>

.idea/runConfigurations/example_lib_main_dart.xml

@@ -1,6 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="example/lib/main.dart" type="FlutterRunConfigurationType" factoryName="Flutter">
-    <option name="filePath" value="$PROJECT_DIR$/example/lib/main.dart" />
-    <method />
-  </configuration>
-</component>

.idea/workspace.xml

@@ -1,45 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="FileEditorManager">
-    <leaf>
-      <file leaf-file-name="bluetooth_low_energy.dart" pinned="false" current-in-tab="true">
-        <entry file="file://$PROJECT_DIR$/lib/bluetooth_low_energy.dart">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="0">
-              <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file leaf-file-name="main.dart" pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/example/lib/main.dart">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="0">
-              <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
-            </state>
-          </provider>
-        </entry>
-      </file>
-    </leaf>
-  </component>
-  <component name="ToolWindowManager">
-    <editor active="true" />
-    <layout>
-      <window_info id="Project" active="true" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="0" side_tool="false" content_ui="combo" />
-    </layout>
-  </component>
-  <component name="ProjectView">
-    <navigator currentView="ProjectPane" proportions="" version="1">
-    </navigator>
-    <panes>
-      <pane id="ProjectPane">
-        <option name="show-excluded-files" value="false" />
-      </pane>
-    </panes>
-  </component>
-  <component name="PropertiesComponent">
-    <property name="last_opened_file_path" value="$PROJECT_DIR$" />
-    <property name="dart.analysis.tool.window.force.activate" value="true" />
-    <property name="show.migrate.to.gradle.popup" value="false" />
-  </component>
-</project>

.metadata

@@ -1,10 +1,33 @@
 # This file tracks properties of this Flutter project.
 # Used by Flutter tool to assess capabilities and perform upgrades etc.
 #
-# This file should be version controlled and should not be manually edited.
+# This file should be version controlled.
 
 version:
-  revision: 02c026b03cd31dd3f867e5faeb7e104cce174c5f
+  revision: f1875d570e39de09040c8f79aa13cc56baab8db1
   channel: stable
 
 project_type: plugin
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: f1875d570e39de09040c8f79aa13cc56baab8db1
+      base_revision: f1875d570e39de09040c8f79aa13cc56baab8db1
+    - platform: android
+      create_revision: f1875d570e39de09040c8f79aa13cc56baab8db1
+      base_revision: f1875d570e39de09040c8f79aa13cc56baab8db1
+    - platform: ios
+      create_revision: f1875d570e39de09040c8f79aa13cc56baab8db1
+      base_revision: f1875d570e39de09040c8f79aa13cc56baab8db1
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'

CHANGELOG.md

@@ -1,3 +1,8 @@
+## 1.0.0
+
+- Upgrade to flutter 3.x.
+- Rewrite the whole project with pigeon.
+
 ## 0.1.0
 
 - Add implementations on iOS.

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2021 yanshouwang
+Copyright (c) 2022 yanshouwang
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -1,12 +1,12 @@
-# Bluetooth Low Energy
+# bluetooth_low_energy
 
 A bluetooth low energy plugin for flutter, which can be used to develope central role apps.
 
 ## Features
 
 ### Central APIs
-- [x] Discover advertisements.
-- [x] Connect/Disconnect to GATTs.
+- [x] Scan advertisements.
+- [x] Connect/Disconnect to peripherals.
 - [x] Read/Write/Notify characteristics.
 - [x] Read/Write descriptors.
 

analysis_options.yaml

@@ -1 +1,18 @@
-include: package:pedantic/analysis_options.yaml
+include: package:flutter_lints/flutter.yaml
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options
+
+analyzer:
+  exclude: 
+    - "**/*.g.dart"
+    - "**/*.pb.dart"
+    - "**/*.pbenum.dart"
+    - "**/*.pbjson.dart"
+    - "**/*.pbserver.dart"
+    - "**/*.mocks.dart"
+
+linter:
+  rules:
+    prefer_single_quotes: true
+    require_trailing_commas: true

android/.gitignore

@@ -6,3 +6,4 @@
 .DS_Store
 /build
 /captures
+.cxx

android/build.gradle

@@ -2,15 +2,14 @@ group 'dev.yanshouwang.bluetooth_low_energy'
 version '1.0-SNAPSHOT'
 
 buildscript {
-    ext.kotlin_version = '1.5.21'
+    ext.kotlin_version = '1.6.10'
     repositories {
         google()
         mavenCentral()
-        maven { url 'https://mirrors.cloud.tencent.com/nexus/repository/maven-public/' }
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.0'
+        classpath 'com.android.tools.build:gradle:7.1.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
@@ -19,7 +18,6 @@ rootProject.allprojects {
     repositories {
         google()
         mavenCentral()
-        maven { url 'https://mirrors.cloud.tencent.com/nexus/repository/maven-public/' }
     }
 }
 
@@ -27,11 +25,21 @@ apply plugin: 'com.android.library'
 apply plugin: 'kotlin-android'
 
 android {
-    compileSdkVersion 30
+    compileSdkVersion 31
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }
+
     defaultConfig {
         minSdkVersion 21
     }
@@ -39,5 +47,6 @@ android {
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    implementation 'com.google.protobuf:protobuf-kotlin:3.17.3'
+    implementation 'com.google.protobuf:protobuf-kotlin:3.19.4'
+    implementation 'com.google.guava:guava:31.1-android'
 }

android/gradle.properties

@@ -1,3 +0,0 @@
-org.gradle.jvmargs=-Xmx1536M
-android.useAndroidX=true
-android.enableJetifier=true

android/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +0,0 @@
-distributionBase=GRADLE_USER_HOME
-distributionPath=wrapper/dists
-zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip

android/src/main/AndroidManifest.xml

@@ -1,7 +1,12 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="dev.yanshouwang.bluetooth_low_energy">
+          package="dev.yanshouwang.bluetooth_low_energy">
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
 
-    <uses-permission android:name="android.permission.BLUETOOTH" />
-    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
-    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
+    <uses-permission android:name="android.permission.BLUETOOTH"
+                     android:maxSdkVersion="30"/>
+    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"
+                     android:maxSdkVersion="30"/>
+
+    <uses-permission android:name="android.permission.BLUETOOTH_SCAN"/>
+    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT"/>
 </manifest>

android/src/main/java/dev/yanshouwang/bluetooth_low_energy/pigeon/Api.java

@@ -0,0 +1,930 @@
+// Autogenerated from Pigeon (v4.0.2), do not edit directly.
+// See also: https://pub.dev/packages/pigeon
+
+package dev.yanshouwang.bluetooth_low_energy.pigeon;
+
+import android.util.Log;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import io.flutter.plugin.common.BasicMessageChannel;
+import io.flutter.plugin.common.BinaryMessenger;
+import io.flutter.plugin.common.MessageCodec;
+import io.flutter.plugin.common.StandardMessageCodec;
+import java.io.ByteArrayOutputStream;
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.HashMap;
+
+/** Generated class from Pigeon. */
+@SuppressWarnings({"unused", "unchecked", "CodeBlock2Expr", "RedundantSuppression"})
+public class Api {
+
+  public interface Result<T> {
+    void success(T result);
+    void error(Throwable error);
+  }
+  private static class CentralManagerHostApiCodec extends StandardMessageCodec {
+    public static final CentralManagerHostApiCodec INSTANCE = new CentralManagerHostApiCodec();
+    private CentralManagerHostApiCodec() {}
+  }
+
+  /** Generated interface from Pigeon that represents a handler of messages from Flutter.*/
+  public interface CentralManagerHostApi {
+    void authorize(Result<Boolean> result);
+    @NonNull Long getState();
+    void addStateObserver();
+    void removeStateObserver();
+    void startScan(@Nullable List<byte[]> uuidBuffers, Result<Void> result);
+    void stopScan();
+    void connect(@NonNull byte[] uuidBuffer, Result<byte[]> result);
+
+    /** The codec used by CentralManagerHostApi. */
+    static MessageCodec<Object> getCodec() {
+      return CentralManagerHostApiCodec.INSTANCE;
+    }
+
+    /** Sets up an instance of `CentralManagerHostApi` to handle messages through the `binaryMessenger`. */
+    static void setup(BinaryMessenger binaryMessenger, CentralManagerHostApi api) {
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.CentralManagerHostApi.authorize", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              Result<Boolean> resultCallback = new Result<Boolean>() {
+                public void success(Boolean result) {
+                  wrapped.put("result", result);
+                  reply.reply(wrapped);
+                }
+                public void error(Throwable error) {
+                  wrapped.put("error", wrapError(error));
+                  reply.reply(wrapped);
+                }
+              };
+
+              api.authorize(resultCallback);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+              reply.reply(wrapped);
+            }
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.CentralManagerHostApi.getState", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              Long output = api.getState();
+              wrapped.put("result", output);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+            }
+            reply.reply(wrapped);
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.CentralManagerHostApi.addStateObserver", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              api.addStateObserver();
+              wrapped.put("result", null);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+            }
+            reply.reply(wrapped);
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.CentralManagerHostApi.removeStateObserver", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              api.removeStateObserver();
+              wrapped.put("result", null);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+            }
+            reply.reply(wrapped);
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.CentralManagerHostApi.startScan", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              List<byte[]> uuidBuffersArg = (List<byte[]>)args.get(0);
+              Result<Void> resultCallback = new Result<Void>() {
+                public void success(Void result) {
+                  wrapped.put("result", null);
+                  reply.reply(wrapped);
+                }
+                public void error(Throwable error) {
+                  wrapped.put("error", wrapError(error));
+                  reply.reply(wrapped);
+                }
+              };
+
+              api.startScan(uuidBuffersArg, resultCallback);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+              reply.reply(wrapped);
+            }
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.CentralManagerHostApi.stopScan", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              api.stopScan();
+              wrapped.put("result", null);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+            }
+            reply.reply(wrapped);
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.CentralManagerHostApi.connect", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              byte[] uuidBufferArg = (byte[])args.get(0);
+              if (uuidBufferArg == null) {
+                throw new NullPointerException("uuidBufferArg unexpectedly null.");
+              }
+              Result<byte[]> resultCallback = new Result<byte[]>() {
+                public void success(byte[] result) {
+                  wrapped.put("result", result);
+                  reply.reply(wrapped);
+                }
+                public void error(Throwable error) {
+                  wrapped.put("error", wrapError(error));
+                  reply.reply(wrapped);
+                }
+              };
+
+              api.connect(uuidBufferArg, resultCallback);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+              reply.reply(wrapped);
+            }
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+    }
+  }
+  private static class CentralManagerFlutterApiCodec extends StandardMessageCodec {
+    public static final CentralManagerFlutterApiCodec INSTANCE = new CentralManagerFlutterApiCodec();
+    private CentralManagerFlutterApiCodec() {}
+  }
+
+  /** Generated class from Pigeon that represents Flutter messages that can be called from Java.*/
+  public static class CentralManagerFlutterApi {
+    private final BinaryMessenger binaryMessenger;
+    public CentralManagerFlutterApi(BinaryMessenger argBinaryMessenger){
+      this.binaryMessenger = argBinaryMessenger;
+    }
+    public interface Reply<T> {
+      void reply(T reply);
+    }
+    static MessageCodec<Object> getCodec() {
+      return CentralManagerFlutterApiCodec.INSTANCE;
+    }
+
+    public void notifyState(@NonNull Long stateNumberArg, Reply<Void> callback) {
+      BasicMessageChannel<Object> channel =
+          new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.CentralManagerFlutterApi.notifyState", getCodec());
+      channel.send(new ArrayList<Object>(Arrays.asList(stateNumberArg)), channelReply -> {
+        callback.reply(null);
+      });
+    }
+    public void notifyAdvertisement(@NonNull byte[] advertisementBufferArg, Reply<Void> callback) {
+      BasicMessageChannel<Object> channel =
+          new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.CentralManagerFlutterApi.notifyAdvertisement", getCodec());
+      channel.send(new ArrayList<Object>(Arrays.asList(advertisementBufferArg)), channelReply -> {
+        callback.reply(null);
+      });
+    }
+  }
+  private static class PeripheralHostApiCodec extends StandardMessageCodec {
+    public static final PeripheralHostApiCodec INSTANCE = new PeripheralHostApiCodec();
+    private PeripheralHostApiCodec() {}
+  }
+
+  /** Generated interface from Pigeon that represents a handler of messages from Flutter.*/
+  public interface PeripheralHostApi {
+    void allocate(@NonNull Long id, @NonNull Long instanceId);
+    void free(@NonNull Long id);
+    void disconnect(@NonNull Long id, Result<Void> result);
+    void discoverServices(@NonNull Long id, Result<List<byte[]>> result);
+
+    /** The codec used by PeripheralHostApi. */
+    static MessageCodec<Object> getCodec() {
+      return PeripheralHostApiCodec.INSTANCE;
+    }
+
+    /** Sets up an instance of `PeripheralHostApi` to handle messages through the `binaryMessenger`. */
+    static void setup(BinaryMessenger binaryMessenger, PeripheralHostApi api) {
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.PeripheralHostApi.allocate", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              Number idArg = (Number)args.get(0);
+              if (idArg == null) {
+                throw new NullPointerException("idArg unexpectedly null.");
+              }
+              Number instanceIdArg = (Number)args.get(1);
+              if (instanceIdArg == null) {
+                throw new NullPointerException("instanceIdArg unexpectedly null.");
+              }
+              api.allocate((idArg == null) ? null : idArg.longValue(), (instanceIdArg == null) ? null : instanceIdArg.longValue());
+              wrapped.put("result", null);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+            }
+            reply.reply(wrapped);
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.PeripheralHostApi.free", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              Number idArg = (Number)args.get(0);
+              if (idArg == null) {
+                throw new NullPointerException("idArg unexpectedly null.");
+              }
+              api.free((idArg == null) ? null : idArg.longValue());
+              wrapped.put("result", null);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+            }
+            reply.reply(wrapped);
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.PeripheralHostApi.disconnect", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              Number idArg = (Number)args.get(0);
+              if (idArg == null) {
+                throw new NullPointerException("idArg unexpectedly null.");
+              }
+              Result<Void> resultCallback = new Result<Void>() {
+                public void success(Void result) {
+                  wrapped.put("result", null);
+                  reply.reply(wrapped);
+                }
+                public void error(Throwable error) {
+                  wrapped.put("error", wrapError(error));
+                  reply.reply(wrapped);
+                }
+              };
+
+              api.disconnect((idArg == null) ? null : idArg.longValue(), resultCallback);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+              reply.reply(wrapped);
+            }
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.PeripheralHostApi.discoverServices", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              Number idArg = (Number)args.get(0);
+              if (idArg == null) {
+                throw new NullPointerException("idArg unexpectedly null.");
+              }
+              Result<List<byte[]>> resultCallback = new Result<List<byte[]>>() {
+                public void success(List<byte[]> result) {
+                  wrapped.put("result", result);
+                  reply.reply(wrapped);
+                }
+                public void error(Throwable error) {
+                  wrapped.put("error", wrapError(error));
+                  reply.reply(wrapped);
+                }
+              };
+
+              api.discoverServices((idArg == null) ? null : idArg.longValue(), resultCallback);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+              reply.reply(wrapped);
+            }
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+    }
+  }
+  private static class PeripheralFlutterApiCodec extends StandardMessageCodec {
+    public static final PeripheralFlutterApiCodec INSTANCE = new PeripheralFlutterApiCodec();
+    private PeripheralFlutterApiCodec() {}
+  }
+
+  /** Generated class from Pigeon that represents Flutter messages that can be called from Java.*/
+  public static class PeripheralFlutterApi {
+    private final BinaryMessenger binaryMessenger;
+    public PeripheralFlutterApi(BinaryMessenger argBinaryMessenger){
+      this.binaryMessenger = argBinaryMessenger;
+    }
+    public interface Reply<T> {
+      void reply(T reply);
+    }
+    static MessageCodec<Object> getCodec() {
+      return PeripheralFlutterApiCodec.INSTANCE;
+    }
+
+    public void notifyConnectionLost(@NonNull Long idArg, @NonNull byte[] errorBufferArg, Reply<Void> callback) {
+      BasicMessageChannel<Object> channel =
+          new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.PeripheralFlutterApi.notifyConnectionLost", getCodec());
+      channel.send(new ArrayList<Object>(Arrays.asList(idArg, errorBufferArg)), channelReply -> {
+        callback.reply(null);
+      });
+    }
+  }
+  private static class GattServiceHostApiCodec extends StandardMessageCodec {
+    public static final GattServiceHostApiCodec INSTANCE = new GattServiceHostApiCodec();
+    private GattServiceHostApiCodec() {}
+  }
+
+  /** Generated interface from Pigeon that represents a handler of messages from Flutter.*/
+  public interface GattServiceHostApi {
+    void allocate(@NonNull Long id, @NonNull Long instanceId);
+    void free(@NonNull Long id);
+    void discoverCharacteristics(@NonNull Long id, Result<List<byte[]>> result);
+
+    /** The codec used by GattServiceHostApi. */
+    static MessageCodec<Object> getCodec() {
+      return GattServiceHostApiCodec.INSTANCE;
+    }
+
+    /** Sets up an instance of `GattServiceHostApi` to handle messages through the `binaryMessenger`. */
+    static void setup(BinaryMessenger binaryMessenger, GattServiceHostApi api) {
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.GattServiceHostApi.allocate", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              Number idArg = (Number)args.get(0);
+              if (idArg == null) {
+                throw new NullPointerException("idArg unexpectedly null.");
+              }
+              Number instanceIdArg = (Number)args.get(1);
+              if (instanceIdArg == null) {
+                throw new NullPointerException("instanceIdArg unexpectedly null.");
+              }
+              api.allocate((idArg == null) ? null : idArg.longValue(), (instanceIdArg == null) ? null : instanceIdArg.longValue());
+              wrapped.put("result", null);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+            }
+            reply.reply(wrapped);
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.GattServiceHostApi.free", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              Number idArg = (Number)args.get(0);
+              if (idArg == null) {
+                throw new NullPointerException("idArg unexpectedly null.");
+              }
+              api.free((idArg == null) ? null : idArg.longValue());
+              wrapped.put("result", null);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+            }
+            reply.reply(wrapped);
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.GattServiceHostApi.discoverCharacteristics", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              Number idArg = (Number)args.get(0);
+              if (idArg == null) {
+                throw new NullPointerException("idArg unexpectedly null.");
+              }
+              Result<List<byte[]>> resultCallback = new Result<List<byte[]>>() {
+                public void success(List<byte[]> result) {
+                  wrapped.put("result", result);
+                  reply.reply(wrapped);
+                }
+                public void error(Throwable error) {
+                  wrapped.put("error", wrapError(error));
+                  reply.reply(wrapped);
+                }
+              };
+
+              api.discoverCharacteristics((idArg == null) ? null : idArg.longValue(), resultCallback);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+              reply.reply(wrapped);
+            }
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+    }
+  }
+  private static class GattCharacteristicHostApiCodec extends StandardMessageCodec {
+    public static final GattCharacteristicHostApiCodec INSTANCE = new GattCharacteristicHostApiCodec();
+    private GattCharacteristicHostApiCodec() {}
+  }
+
+  /** Generated interface from Pigeon that represents a handler of messages from Flutter.*/
+  public interface GattCharacteristicHostApi {
+    void allocate(@NonNull Long id, @NonNull Long instanceId);
+    void free(@NonNull Long id);
+    void discoverDescriptors(@NonNull Long id, Result<List<byte[]>> result);
+    void read(@NonNull Long id, Result<byte[]> result);
+    void write(@NonNull Long id, @NonNull byte[] value, @NonNull Boolean withoutResponse, Result<Void> result);
+    void setNotify(@NonNull Long id, @NonNull Boolean value, Result<Void> result);
+
+    /** The codec used by GattCharacteristicHostApi. */
+    static MessageCodec<Object> getCodec() {
+      return GattCharacteristicHostApiCodec.INSTANCE;
+    }
+
+    /** Sets up an instance of `GattCharacteristicHostApi` to handle messages through the `binaryMessenger`. */
+    static void setup(BinaryMessenger binaryMessenger, GattCharacteristicHostApi api) {
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.GattCharacteristicHostApi.allocate", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              Number idArg = (Number)args.get(0);
+              if (idArg == null) {
+                throw new NullPointerException("idArg unexpectedly null.");
+              }
+              Number instanceIdArg = (Number)args.get(1);
+              if (instanceIdArg == null) {
+                throw new NullPointerException("instanceIdArg unexpectedly null.");
+              }
+              api.allocate((idArg == null) ? null : idArg.longValue(), (instanceIdArg == null) ? null : instanceIdArg.longValue());
+              wrapped.put("result", null);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+            }
+            reply.reply(wrapped);
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.GattCharacteristicHostApi.free", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              Number idArg = (Number)args.get(0);
+              if (idArg == null) {
+                throw new NullPointerException("idArg unexpectedly null.");
+              }
+              api.free((idArg == null) ? null : idArg.longValue());
+              wrapped.put("result", null);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+            }
+            reply.reply(wrapped);
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.GattCharacteristicHostApi.discoverDescriptors", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              Number idArg = (Number)args.get(0);
+              if (idArg == null) {
+                throw new NullPointerException("idArg unexpectedly null.");
+              }
+              Result<List<byte[]>> resultCallback = new Result<List<byte[]>>() {
+                public void success(List<byte[]> result) {
+                  wrapped.put("result", result);
+                  reply.reply(wrapped);
+                }
+                public void error(Throwable error) {
+                  wrapped.put("error", wrapError(error));
+                  reply.reply(wrapped);
+                }
+              };
+
+              api.discoverDescriptors((idArg == null) ? null : idArg.longValue(), resultCallback);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+              reply.reply(wrapped);
+            }
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.GattCharacteristicHostApi.read", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              Number idArg = (Number)args.get(0);
+              if (idArg == null) {
+                throw new NullPointerException("idArg unexpectedly null.");
+              }
+              Result<byte[]> resultCallback = new Result<byte[]>() {
+                public void success(byte[] result) {
+                  wrapped.put("result", result);
+                  reply.reply(wrapped);
+                }
+                public void error(Throwable error) {
+                  wrapped.put("error", wrapError(error));
+                  reply.reply(wrapped);
+                }
+              };
+
+              api.read((idArg == null) ? null : idArg.longValue(), resultCallback);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+              reply.reply(wrapped);
+            }
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.GattCharacteristicHostApi.write", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              Number idArg = (Number)args.get(0);
+              if (idArg == null) {
+                throw new NullPointerException("idArg unexpectedly null.");
+              }
+              byte[] valueArg = (byte[])args.get(1);
+              if (valueArg == null) {
+                throw new NullPointerException("valueArg unexpectedly null.");
+              }
+              Boolean withoutResponseArg = (Boolean)args.get(2);
+              if (withoutResponseArg == null) {
+                throw new NullPointerException("withoutResponseArg unexpectedly null.");
+              }
+              Result<Void> resultCallback = new Result<Void>() {
+                public void success(Void result) {
+                  wrapped.put("result", null);
+                  reply.reply(wrapped);
+                }
+                public void error(Throwable error) {
+                  wrapped.put("error", wrapError(error));
+                  reply.reply(wrapped);
+                }
+              };
+
+              api.write((idArg == null) ? null : idArg.longValue(), valueArg, withoutResponseArg, resultCallback);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+              reply.reply(wrapped);
+            }
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.GattCharacteristicHostApi.setNotify", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              Number idArg = (Number)args.get(0);
+              if (idArg == null) {
+                throw new NullPointerException("idArg unexpectedly null.");
+              }
+              Boolean valueArg = (Boolean)args.get(1);
+              if (valueArg == null) {
+                throw new NullPointerException("valueArg unexpectedly null.");
+              }
+              Result<Void> resultCallback = new Result<Void>() {
+                public void success(Void result) {
+                  wrapped.put("result", null);
+                  reply.reply(wrapped);
+                }
+                public void error(Throwable error) {
+                  wrapped.put("error", wrapError(error));
+                  reply.reply(wrapped);
+                }
+              };
+
+              api.setNotify((idArg == null) ? null : idArg.longValue(), valueArg, resultCallback);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+              reply.reply(wrapped);
+            }
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+    }
+  }
+  private static class GattCharacteristicFlutterApiCodec extends StandardMessageCodec {
+    public static final GattCharacteristicFlutterApiCodec INSTANCE = new GattCharacteristicFlutterApiCodec();
+    private GattCharacteristicFlutterApiCodec() {}
+  }
+
+  /** Generated class from Pigeon that represents Flutter messages that can be called from Java.*/
+  public static class GattCharacteristicFlutterApi {
+    private final BinaryMessenger binaryMessenger;
+    public GattCharacteristicFlutterApi(BinaryMessenger argBinaryMessenger){
+      this.binaryMessenger = argBinaryMessenger;
+    }
+    public interface Reply<T> {
+      void reply(T reply);
+    }
+    static MessageCodec<Object> getCodec() {
+      return GattCharacteristicFlutterApiCodec.INSTANCE;
+    }
+
+    public void notifyValue(@NonNull Long idArg, @NonNull byte[] valueArg, Reply<Void> callback) {
+      BasicMessageChannel<Object> channel =
+          new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.GattCharacteristicFlutterApi.notifyValue", getCodec());
+      channel.send(new ArrayList<Object>(Arrays.asList(idArg, valueArg)), channelReply -> {
+        callback.reply(null);
+      });
+    }
+  }
+  private static class GattDescriptorHostApiCodec extends StandardMessageCodec {
+    public static final GattDescriptorHostApiCodec INSTANCE = new GattDescriptorHostApiCodec();
+    private GattDescriptorHostApiCodec() {}
+  }
+
+  /** Generated interface from Pigeon that represents a handler of messages from Flutter.*/
+  public interface GattDescriptorHostApi {
+    void allocate(@NonNull Long id, @NonNull Long instanceId);
+    void free(@NonNull Long id);
+    void read(@NonNull Long id, Result<byte[]> result);
+    void write(@NonNull Long id, @NonNull byte[] value, Result<Void> result);
+
+    /** The codec used by GattDescriptorHostApi. */
+    static MessageCodec<Object> getCodec() {
+      return GattDescriptorHostApiCodec.INSTANCE;
+    }
+
+    /** Sets up an instance of `GattDescriptorHostApi` to handle messages through the `binaryMessenger`. */
+    static void setup(BinaryMessenger binaryMessenger, GattDescriptorHostApi api) {
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.GattDescriptorHostApi.allocate", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              Number idArg = (Number)args.get(0);
+              if (idArg == null) {
+                throw new NullPointerException("idArg unexpectedly null.");
+              }
+              Number instanceIdArg = (Number)args.get(1);
+              if (instanceIdArg == null) {
+                throw new NullPointerException("instanceIdArg unexpectedly null.");
+              }
+              api.allocate((idArg == null) ? null : idArg.longValue(), (instanceIdArg == null) ? null : instanceIdArg.longValue());
+              wrapped.put("result", null);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+            }
+            reply.reply(wrapped);
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.GattDescriptorHostApi.free", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              Number idArg = (Number)args.get(0);
+              if (idArg == null) {
+                throw new NullPointerException("idArg unexpectedly null.");
+              }
+              api.free((idArg == null) ? null : idArg.longValue());
+              wrapped.put("result", null);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+            }
+            reply.reply(wrapped);
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.GattDescriptorHostApi.read", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              Number idArg = (Number)args.get(0);
+              if (idArg == null) {
+                throw new NullPointerException("idArg unexpectedly null.");
+              }
+              Result<byte[]> resultCallback = new Result<byte[]>() {
+                public void success(byte[] result) {
+                  wrapped.put("result", result);
+                  reply.reply(wrapped);
+                }
+                public void error(Throwable error) {
+                  wrapped.put("error", wrapError(error));
+                  reply.reply(wrapped);
+                }
+              };
+
+              api.read((idArg == null) ? null : idArg.longValue(), resultCallback);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+              reply.reply(wrapped);
+            }
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.GattDescriptorHostApi.write", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              ArrayList<Object> args = (ArrayList<Object>)message;
+              Number idArg = (Number)args.get(0);
+              if (idArg == null) {
+                throw new NullPointerException("idArg unexpectedly null.");
+              }
+              byte[] valueArg = (byte[])args.get(1);
+              if (valueArg == null) {
+                throw new NullPointerException("valueArg unexpectedly null.");
+              }
+              Result<Void> resultCallback = new Result<Void>() {
+                public void success(Void result) {
+                  wrapped.put("result", null);
+                  reply.reply(wrapped);
+                }
+                public void error(Throwable error) {
+                  wrapped.put("error", wrapError(error));
+                  reply.reply(wrapped);
+                }
+              };
+
+              api.write((idArg == null) ? null : idArg.longValue(), valueArg, resultCallback);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+              reply.reply(wrapped);
+            }
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+    }
+  }
+  private static Map<String, Object> wrapError(Throwable exception) {
+    Map<String, Object> errorMap = new HashMap<>();
+    errorMap.put("message", exception.toString());
+    errorMap.put("code", exception.getClass().getSimpleName());
+    errorMap.put("details", "Cause: " + exception.getCause() + ", Stacktrace: " + Log.getStackTraceString(exception));
+    return errorMap;
+  }
+}

android/src/main/java/dev/yanshouwang/bluetooth_low_energy/proto/AdvertisementOrBuilder.java

@@ -0,0 +1,153 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+public interface AdvertisementOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:proto.Advertisement)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   * <code>.proto.UUID uuid = 1;</code>
+   * @return Whether the uuid field is set.
+   */
+  boolean hasUuid();
+  /**
+   * <code>.proto.UUID uuid = 1;</code>
+   * @return The uuid.
+   */
+  dev.yanshouwang.bluetooth_low_energy.proto.UUID getUuid();
+  /**
+   * <code>.proto.UUID uuid = 1;</code>
+   */
+  dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder getUuidOrBuilder();
+
+  /**
+   * <code>int32 rssi = 2;</code>
+   * @return The rssi.
+   */
+  int getRssi();
+
+  /**
+   * <code>optional bool connectable = 3;</code>
+   * @return Whether the connectable field is set.
+   */
+  boolean hasConnectable();
+  /**
+   * <code>optional bool connectable = 3;</code>
+   * @return The connectable.
+   */
+  boolean getConnectable();
+
+  /**
+   * <code>bytes data = 4;</code>
+   * @return The data.
+   */
+  com.google.protobuf.ByteString getData();
+
+  /**
+   * <code>optional string local_name = 5;</code>
+   * @return Whether the localName field is set.
+   */
+  boolean hasLocalName();
+  /**
+   * <code>optional string local_name = 5;</code>
+   * @return The localName.
+   */
+  java.lang.String getLocalName();
+  /**
+   * <code>optional string local_name = 5;</code>
+   * @return The bytes for localName.
+   */
+  com.google.protobuf.ByteString
+      getLocalNameBytes();
+
+  /**
+   * <code>bytes manufacturer_specific_data = 6;</code>
+   * @return The manufacturerSpecificData.
+   */
+  com.google.protobuf.ByteString getManufacturerSpecificData();
+
+  /**
+   * <code>repeated .proto.ServiceData service_datas = 7;</code>
+   */
+  java.util.List<dev.yanshouwang.bluetooth_low_energy.proto.ServiceData> 
+      getServiceDatasList();
+  /**
+   * <code>repeated .proto.ServiceData service_datas = 7;</code>
+   */
+  dev.yanshouwang.bluetooth_low_energy.proto.ServiceData getServiceDatas(int index);
+  /**
+   * <code>repeated .proto.ServiceData service_datas = 7;</code>
+   */
+  int getServiceDatasCount();
+  /**
+   * <code>repeated .proto.ServiceData service_datas = 7;</code>
+   */
+  java.util.List<? extends dev.yanshouwang.bluetooth_low_energy.proto.ServiceDataOrBuilder> 
+      getServiceDatasOrBuilderList();
+  /**
+   * <code>repeated .proto.ServiceData service_datas = 7;</code>
+   */
+  dev.yanshouwang.bluetooth_low_energy.proto.ServiceDataOrBuilder getServiceDatasOrBuilder(
+      int index);
+
+  /**
+   * <code>repeated .proto.UUID service_uuids = 8;</code>
+   */
+  java.util.List<dev.yanshouwang.bluetooth_low_energy.proto.UUID> 
+      getServiceUuidsList();
+  /**
+   * <code>repeated .proto.UUID service_uuids = 8;</code>
+   */
+  dev.yanshouwang.bluetooth_low_energy.proto.UUID getServiceUuids(int index);
+  /**
+   * <code>repeated .proto.UUID service_uuids = 8;</code>
+   */
+  int getServiceUuidsCount();
+  /**
+   * <code>repeated .proto.UUID service_uuids = 8;</code>
+   */
+  java.util.List<? extends dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder> 
+      getServiceUuidsOrBuilderList();
+  /**
+   * <code>repeated .proto.UUID service_uuids = 8;</code>
+   */
+  dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder getServiceUuidsOrBuilder(
+      int index);
+
+  /**
+   * <code>repeated .proto.UUID solicited_service_uuids = 9;</code>
+   */
+  java.util.List<dev.yanshouwang.bluetooth_low_energy.proto.UUID> 
+      getSolicitedServiceUuidsList();
+  /**
+   * <code>repeated .proto.UUID solicited_service_uuids = 9;</code>
+   */
+  dev.yanshouwang.bluetooth_low_energy.proto.UUID getSolicitedServiceUuids(int index);
+  /**
+   * <code>repeated .proto.UUID solicited_service_uuids = 9;</code>
+   */
+  int getSolicitedServiceUuidsCount();
+  /**
+   * <code>repeated .proto.UUID solicited_service_uuids = 9;</code>
+   */
+  java.util.List<? extends dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder> 
+      getSolicitedServiceUuidsOrBuilderList();
+  /**
+   * <code>repeated .proto.UUID solicited_service_uuids = 9;</code>
+   */
+  dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder getSolicitedServiceUuidsOrBuilder(
+      int index);
+
+  /**
+   * <code>optional int32 tx_power_level = 10;</code>
+   * @return Whether the txPowerLevel field is set.
+   */
+  boolean hasTxPowerLevel();
+  /**
+   * <code>optional int32 tx_power_level = 10;</code>
+   * @return The txPowerLevel.
+   */
+  int getTxPowerLevel();
+}

android/src/main/java/dev/yanshouwang/bluetooth_low_energy/proto/BluetoothLowEnergyException.java

@@ -0,0 +1,559 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+/**
+ * Protobuf type {@code proto.BluetoothLowEnergyException}
+ */
+public final class BluetoothLowEnergyException extends
+    com.google.protobuf.GeneratedMessageV3 implements
+    // @@protoc_insertion_point(message_implements:proto.BluetoothLowEnergyException)
+    BluetoothLowEnergyExceptionOrBuilder {
+private static final long serialVersionUID = 0L;
+  // Use BluetoothLowEnergyException.newBuilder() to construct.
+  private BluetoothLowEnergyException(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+  private BluetoothLowEnergyException() {
+    message_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(
+      UnusedPrivateParameter unused) {
+    return new BluetoothLowEnergyException();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet
+  getUnknownFields() {
+    return this.unknownFields;
+  }
+  private BluetoothLowEnergyException(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10: {
+            java.lang.String s = input.readStringRequireUtf8();
+
+            message_ = s;
+            break;
+          }
+          default: {
+            if (!parseUnknownField(
+                input, unknownFields, extensionRegistry, tag)) {
+              done = true;
+            }
+            break;
+          }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(
+          e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+  public static final com.google.protobuf.Descriptors.Descriptor
+      getDescriptor() {
+    return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_BluetoothLowEnergyException_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_BluetoothLowEnergyException_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException.class, dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException.Builder.class);
+  }
+
+  public static final int MESSAGE_FIELD_NUMBER = 1;
+  private volatile java.lang.Object message_;
+  /**
+   * <code>string message = 1;</code>
+   * @return The message.
+   */
+  @java.lang.Override
+  public java.lang.String getMessage() {
+    java.lang.Object ref = message_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = 
+          (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      message_ = s;
+      return s;
+    }
+  }
+  /**
+   * <code>string message = 1;</code>
+   * @return The bytes for message.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString
+      getMessageBytes() {
+    java.lang.Object ref = message_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b = 
+          com.google.protobuf.ByteString.copyFromUtf8(
+              (java.lang.String) ref);
+      message_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  private byte memoizedIsInitialized = -1;
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output)
+                      throws java.io.IOException {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(message_)) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, message_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(message_)) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, message_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+     return true;
+    }
+    if (!(obj instanceof dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException)) {
+      return super.equals(obj);
+    }
+    dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException other = (dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException) obj;
+
+    if (!getMessage()
+        .equals(other.getMessage())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + MESSAGE_FIELD_NUMBER;
+    hash = (53 * hash) + getMessage().hashCode();
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException parseFrom(
+      java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException parseFrom(
+      java.nio.ByteBuffer data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException parseFrom(
+      byte[] data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException parseFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException parseDelimitedFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException parseFrom(
+      com.google.protobuf.CodedInputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() { return newBuilder(); }
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+  public static Builder newBuilder(dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE
+        ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(
+      com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   * Protobuf type {@code proto.BluetoothLowEnergyException}
+   */
+  public static final class Builder extends
+      com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
+      // @@protoc_insertion_point(builder_implements:proto.BluetoothLowEnergyException)
+      dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyExceptionOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_BluetoothLowEnergyException_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_BluetoothLowEnergyException_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException.class, dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException.Builder.class);
+    }
+
+    // Construct using dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(
+        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3
+              .alwaysUseFieldBuilders) {
+      }
+    }
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      message_ = "";
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor
+        getDescriptorForType() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_BluetoothLowEnergyException_descriptor;
+    }
+
+    @java.lang.Override
+    public dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException getDefaultInstanceForType() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException build() {
+      dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException buildPartial() {
+      dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException result = new dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException(this);
+      result.message_ = message_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.setField(field, value);
+    }
+    @java.lang.Override
+    public Builder clearField(
+        com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+    @java.lang.Override
+    public Builder clearOneof(
+        com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException) {
+        return mergeFrom((dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException)other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException other) {
+      if (other == dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException.getDefaultInstance()) return this;
+      if (!other.getMessage().isEmpty()) {
+        message_ = other.message_;
+        onChanged();
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object message_ = "";
+    /**
+     * <code>string message = 1;</code>
+     * @return The message.
+     */
+    public java.lang.String getMessage() {
+      java.lang.Object ref = message_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs =
+            (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        message_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     * <code>string message = 1;</code>
+     * @return The bytes for message.
+     */
+    public com.google.protobuf.ByteString
+        getMessageBytes() {
+      java.lang.Object ref = message_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b = 
+            com.google.protobuf.ByteString.copyFromUtf8(
+                (java.lang.String) ref);
+        message_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     * <code>string message = 1;</code>
+     * @param value The message to set.
+     * @return This builder for chaining.
+     */
+    public Builder setMessage(
+        java.lang.String value) {
+      if (value == null) {
+    throw new NullPointerException();
+  }
+  
+      message_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string message = 1;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearMessage() {
+      
+      message_ = getDefaultInstance().getMessage();
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string message = 1;</code>
+     * @param value The bytes for message to set.
+     * @return This builder for chaining.
+     */
+    public Builder setMessageBytes(
+        com.google.protobuf.ByteString value) {
+      if (value == null) {
+    throw new NullPointerException();
+  }
+  checkByteStringIsUtf8(value);
+      
+      message_ = value;
+      onChanged();
+      return this;
+    }
+    @java.lang.Override
+    public final Builder setUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+
+    // @@protoc_insertion_point(builder_scope:proto.BluetoothLowEnergyException)
+  }
+
+  // @@protoc_insertion_point(class_scope:proto.BluetoothLowEnergyException)
+  private static final dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException DEFAULT_INSTANCE;
+  static {
+    DEFAULT_INSTANCE = new dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException();
+  }
+
+  public static dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<BluetoothLowEnergyException>
+      PARSER = new com.google.protobuf.AbstractParser<BluetoothLowEnergyException>() {
+    @java.lang.Override
+    public BluetoothLowEnergyException parsePartialFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return new BluetoothLowEnergyException(input, extensionRegistry);
+    }
+  };
+
+  public static com.google.protobuf.Parser<BluetoothLowEnergyException> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<BluetoothLowEnergyException> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+
+}
+

android/src/main/java/dev/yanshouwang/bluetooth_low_energy/proto/BluetoothLowEnergyExceptionOrBuilder.java

@@ -0,0 +1,21 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+public interface BluetoothLowEnergyExceptionOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:proto.BluetoothLowEnergyException)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   * <code>string message = 1;</code>
+   * @return The message.
+   */
+  java.lang.String getMessage();
+  /**
+   * <code>string message = 1;</code>
+   * @return The bytes for message.
+   */
+  com.google.protobuf.ByteString
+      getMessageBytes();
+}

android/src/main/java/dev/yanshouwang/bluetooth_low_energy/proto/BluetoothState.java

@@ -0,0 +1,122 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+/**
+ * Protobuf enum {@code proto.BluetoothState}
+ */
+public enum BluetoothState
+    implements com.google.protobuf.ProtocolMessageEnum {
+  /**
+   * <code>BLUETOOTH_STATE_UNSUPPORTED = 0;</code>
+   */
+  BLUETOOTH_STATE_UNSUPPORTED(0),
+  /**
+   * <code>BLUETOOTH_STATE_POWERED_OFF = 1;</code>
+   */
+  BLUETOOTH_STATE_POWERED_OFF(1),
+  /**
+   * <code>BLUETOOTH_STATE_POWERED_ON = 2;</code>
+   */
+  BLUETOOTH_STATE_POWERED_ON(2),
+  UNRECOGNIZED(-1),
+  ;
+
+  /**
+   * <code>BLUETOOTH_STATE_UNSUPPORTED = 0;</code>
+   */
+  public static final int BLUETOOTH_STATE_UNSUPPORTED_VALUE = 0;
+  /**
+   * <code>BLUETOOTH_STATE_POWERED_OFF = 1;</code>
+   */
+  public static final int BLUETOOTH_STATE_POWERED_OFF_VALUE = 1;
+  /**
+   * <code>BLUETOOTH_STATE_POWERED_ON = 2;</code>
+   */
+  public static final int BLUETOOTH_STATE_POWERED_ON_VALUE = 2;
+
+
+  public final int getNumber() {
+    if (this == UNRECOGNIZED) {
+      throw new java.lang.IllegalArgumentException(
+          "Can't get the number of an unknown enum value.");
+    }
+    return value;
+  }
+
+  /**
+   * @param value The numeric wire value of the corresponding enum entry.
+   * @return The enum associated with the given numeric wire value.
+   * @deprecated Use {@link #forNumber(int)} instead.
+   */
+  @java.lang.Deprecated
+  public static BluetoothState valueOf(int value) {
+    return forNumber(value);
+  }
+
+  /**
+   * @param value The numeric wire value of the corresponding enum entry.
+   * @return The enum associated with the given numeric wire value.
+   */
+  public static BluetoothState forNumber(int value) {
+    switch (value) {
+      case 0: return BLUETOOTH_STATE_UNSUPPORTED;
+      case 1: return BLUETOOTH_STATE_POWERED_OFF;
+      case 2: return BLUETOOTH_STATE_POWERED_ON;
+      default: return null;
+    }
+  }
+
+  public static com.google.protobuf.Internal.EnumLiteMap<BluetoothState>
+      internalGetValueMap() {
+    return internalValueMap;
+  }
+  private static final com.google.protobuf.Internal.EnumLiteMap<
+      BluetoothState> internalValueMap =
+        new com.google.protobuf.Internal.EnumLiteMap<BluetoothState>() {
+          public BluetoothState findValueByNumber(int number) {
+            return BluetoothState.forNumber(number);
+          }
+        };
+
+  public final com.google.protobuf.Descriptors.EnumValueDescriptor
+      getValueDescriptor() {
+    if (this == UNRECOGNIZED) {
+      throw new java.lang.IllegalStateException(
+          "Can't get the descriptor of an unrecognized enum value.");
+    }
+    return getDescriptor().getValues().get(ordinal());
+  }
+  public final com.google.protobuf.Descriptors.EnumDescriptor
+      getDescriptorForType() {
+    return getDescriptor();
+  }
+  public static final com.google.protobuf.Descriptors.EnumDescriptor
+      getDescriptor() {
+    return dev.yanshouwang.bluetooth_low_energy.proto.Messages.getDescriptor().getEnumTypes().get(0);
+  }
+
+  private static final BluetoothState[] VALUES = values();
+
+  public static BluetoothState valueOf(
+      com.google.protobuf.Descriptors.EnumValueDescriptor desc) {
+    if (desc.getType() != getDescriptor()) {
+      throw new java.lang.IllegalArgumentException(
+        "EnumValueDescriptor is not for this type.");
+    }
+    if (desc.getIndex() == -1) {
+      return UNRECOGNIZED;
+    }
+    return VALUES[desc.getIndex()];
+  }
+
+  private final int value;
+
+  private BluetoothState(int value) {
+    this.value = value;
+  }
+
+  // @@protoc_insertion_point(enum_scope:proto.BluetoothState)
+}
+

android/src/main/java/dev/yanshouwang/bluetooth_low_energy/proto/GattCharacteristic.java

@@ -0,0 +1,934 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+/**
+ * Protobuf type {@code proto.GattCharacteristic}
+ */
+public final class GattCharacteristic extends
+    com.google.protobuf.GeneratedMessageV3 implements
+    // @@protoc_insertion_point(message_implements:proto.GattCharacteristic)
+    GattCharacteristicOrBuilder {
+private static final long serialVersionUID = 0L;
+  // Use GattCharacteristic.newBuilder() to construct.
+  private GattCharacteristic(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+  private GattCharacteristic() {
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(
+      UnusedPrivateParameter unused) {
+    return new GattCharacteristic();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet
+  getUnknownFields() {
+    return this.unknownFields;
+  }
+  private GattCharacteristic(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
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+            uuid_ = input.readMessage(dev.yanshouwang.bluetooth_low_energy.proto.UUID.parser(), extensionRegistry);
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+              uuid_ = subBuilder.buildPartial();
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+
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+  }
+
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+  @java.lang.Override
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+
+  public static final int UUID_FIELD_NUMBER = 2;
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+  @java.lang.Override
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+
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+  private boolean canRead_;
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+   * @return The canRead.
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+  /**
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+    memoizedSize = size;
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+  }
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+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+     return true;
+    }
+    if (!(obj instanceof dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristic)) {
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+    if (getCanNotify()
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+    return true;
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+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
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+      com.google.protobuf.ByteString data)
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+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
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+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristic parseFrom(
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+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
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+        .parseDelimitedWithIOException(PARSER, input);
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+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristic other) {
+      if (other == dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristic.getDefaultInstance()) return this;
+      if (other.getId() != 0L) {
+        setId(other.getId());
+      }
+      if (other.hasUuid()) {
+        mergeUuid(other.getUuid());
+      }
+      if (other.getCanRead() != false) {
+        setCanRead(other.getCanRead());
+      }
+      if (other.getCanWrite() != false) {
+        setCanWrite(other.getCanWrite());
+      }
+      if (other.getCanWriteWithoutResponse() != false) {
+        setCanWriteWithoutResponse(other.getCanWriteWithoutResponse());
+      }
+      if (other.getCanNotify() != false) {
+        setCanNotify(other.getCanNotify());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristic parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristic) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private long id_ ;
+    /**
+     * <code>int64 id = 1;</code>
+     * @return The id.
+     */
+    @java.lang.Override
+    public long getId() {
+      return id_;
+    }
+    /**
+     * <code>int64 id = 1;</code>
+     * @param value The id to set.
+     * @return This builder for chaining.
+     */
+    public Builder setId(long value) {
+      
+      id_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>int64 id = 1;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearId() {
+      
+      id_ = 0L;
+      onChanged();
+      return this;
+    }
+
+    private dev.yanshouwang.bluetooth_low_energy.proto.UUID uuid_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+        dev.yanshouwang.bluetooth_low_energy.proto.UUID, dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder, dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder> uuidBuilder_;
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     * @return Whether the uuid field is set.
+     */
+    public boolean hasUuid() {
+      return uuidBuilder_ != null || uuid_ != null;
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     * @return The uuid.
+     */
+    public dev.yanshouwang.bluetooth_low_energy.proto.UUID getUuid() {
+      if (uuidBuilder_ == null) {
+        return uuid_ == null ? dev.yanshouwang.bluetooth_low_energy.proto.UUID.getDefaultInstance() : uuid_;
+      } else {
+        return uuidBuilder_.getMessage();
+      }
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    public Builder setUuid(dev.yanshouwang.bluetooth_low_energy.proto.UUID value) {
+      if (uuidBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        uuid_ = value;
+        onChanged();
+      } else {
+        uuidBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    public Builder setUuid(
+        dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder builderForValue) {
+      if (uuidBuilder_ == null) {
+        uuid_ = builderForValue.build();
+        onChanged();
+      } else {
+        uuidBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    public Builder mergeUuid(dev.yanshouwang.bluetooth_low_energy.proto.UUID value) {
+      if (uuidBuilder_ == null) {
+        if (uuid_ != null) {
+          uuid_ =
+            dev.yanshouwang.bluetooth_low_energy.proto.UUID.newBuilder(uuid_).mergeFrom(value).buildPartial();
+        } else {
+          uuid_ = value;
+        }
+        onChanged();
+      } else {
+        uuidBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    public Builder clearUuid() {
+      if (uuidBuilder_ == null) {
+        uuid_ = null;
+        onChanged();
+      } else {
+        uuid_ = null;
+        uuidBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    public dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder getUuidBuilder() {
+      
+      onChanged();
+      return getUuidFieldBuilder().getBuilder();
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    public dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder getUuidOrBuilder() {
+      if (uuidBuilder_ != null) {
+        return uuidBuilder_.getMessageOrBuilder();
+      } else {
+        return uuid_ == null ?
+            dev.yanshouwang.bluetooth_low_energy.proto.UUID.getDefaultInstance() : uuid_;
+      }
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+        dev.yanshouwang.bluetooth_low_energy.proto.UUID, dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder, dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder> 
+        getUuidFieldBuilder() {
+      if (uuidBuilder_ == null) {
+        uuidBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
+            dev.yanshouwang.bluetooth_low_energy.proto.UUID, dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder, dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder>(
+                getUuid(),
+                getParentForChildren(),
+                isClean());
+        uuid_ = null;
+      }
+      return uuidBuilder_;
+    }
+
+    private boolean canRead_ ;
+    /**
+     * <code>bool can_read = 3;</code>
+     * @return The canRead.
+     */
+    @java.lang.Override
+    public boolean getCanRead() {
+      return canRead_;
+    }
+    /**
+     * <code>bool can_read = 3;</code>
+     * @param value The canRead to set.
+     * @return This builder for chaining.
+     */
+    public Builder setCanRead(boolean value) {
+      
+      canRead_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>bool can_read = 3;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearCanRead() {
+      
+      canRead_ = false;
+      onChanged();
+      return this;
+    }
+
+    private boolean canWrite_ ;
+    /**
+     * <code>bool can_write = 4;</code>
+     * @return The canWrite.
+     */
+    @java.lang.Override
+    public boolean getCanWrite() {
+      return canWrite_;
+    }
+    /**
+     * <code>bool can_write = 4;</code>
+     * @param value The canWrite to set.
+     * @return This builder for chaining.
+     */
+    public Builder setCanWrite(boolean value) {
+      
+      canWrite_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>bool can_write = 4;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearCanWrite() {
+      
+      canWrite_ = false;
+      onChanged();
+      return this;
+    }
+
+    private boolean canWriteWithoutResponse_ ;
+    /**
+     * <code>bool can_write_without_response = 5;</code>
+     * @return The canWriteWithoutResponse.
+     */
+    @java.lang.Override
+    public boolean getCanWriteWithoutResponse() {
+      return canWriteWithoutResponse_;
+    }
+    /**
+     * <code>bool can_write_without_response = 5;</code>
+     * @param value The canWriteWithoutResponse to set.
+     * @return This builder for chaining.
+     */
+    public Builder setCanWriteWithoutResponse(boolean value) {
+      
+      canWriteWithoutResponse_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>bool can_write_without_response = 5;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearCanWriteWithoutResponse() {
+      
+      canWriteWithoutResponse_ = false;
+      onChanged();
+      return this;
+    }
+
+    private boolean canNotify_ ;
+    /**
+     * <code>bool can_notify = 6;</code>
+     * @return The canNotify.
+     */
+    @java.lang.Override
+    public boolean getCanNotify() {
+      return canNotify_;
+    }
+    /**
+     * <code>bool can_notify = 6;</code>
+     * @param value The canNotify to set.
+     * @return This builder for chaining.
+     */
+    public Builder setCanNotify(boolean value) {
+      
+      canNotify_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>bool can_notify = 6;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearCanNotify() {
+      
+      canNotify_ = false;
+      onChanged();
+      return this;
+    }
+    @java.lang.Override
+    public final Builder setUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+
+    // @@protoc_insertion_point(builder_scope:proto.GattCharacteristic)
+  }
+
+  // @@protoc_insertion_point(class_scope:proto.GattCharacteristic)
+  private static final dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristic DEFAULT_INSTANCE;
+  static {
+    DEFAULT_INSTANCE = new dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristic();
+  }
+
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristic getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<GattCharacteristic>
+      PARSER = new com.google.protobuf.AbstractParser<GattCharacteristic>() {
+    @java.lang.Override
+    public GattCharacteristic parsePartialFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return new GattCharacteristic(input, extensionRegistry);
+    }
+  };
+
+  public static com.google.protobuf.Parser<GattCharacteristic> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<GattCharacteristic> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristic getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+
+}
+

android/src/main/java/dev/yanshouwang/bluetooth_low_energy/proto/GattCharacteristicOrBuilder.java

@@ -0,0 +1,54 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+public interface GattCharacteristicOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:proto.GattCharacteristic)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   * <code>int64 id = 1;</code>
+   * @return The id.
+   */
+  long getId();
+
+  /**
+   * <code>.proto.UUID uuid = 2;</code>
+   * @return Whether the uuid field is set.
+   */
+  boolean hasUuid();
+  /**
+   * <code>.proto.UUID uuid = 2;</code>
+   * @return The uuid.
+   */
+  dev.yanshouwang.bluetooth_low_energy.proto.UUID getUuid();
+  /**
+   * <code>.proto.UUID uuid = 2;</code>
+   */
+  dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder getUuidOrBuilder();
+
+  /**
+   * <code>bool can_read = 3;</code>
+   * @return The canRead.
+   */
+  boolean getCanRead();
+
+  /**
+   * <code>bool can_write = 4;</code>
+   * @return The canWrite.
+   */
+  boolean getCanWrite();
+
+  /**
+   * <code>bool can_write_without_response = 5;</code>
+   * @return The canWriteWithoutResponse.
+   */
+  boolean getCanWriteWithoutResponse();
+
+  /**
+   * <code>bool can_notify = 6;</code>
+   * @return The canNotify.
+   */
+  boolean getCanNotify();
+}

android/src/main/java/dev/yanshouwang/bluetooth_low_energy/proto/GattDescriptor.java

@@ -0,0 +1,674 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+/**
+ * Protobuf type {@code proto.GattDescriptor}
+ */
+public final class GattDescriptor extends
+    com.google.protobuf.GeneratedMessageV3 implements
+    // @@protoc_insertion_point(message_implements:proto.GattDescriptor)
+    GattDescriptorOrBuilder {
+private static final long serialVersionUID = 0L;
+  // Use GattDescriptor.newBuilder() to construct.
+  private GattDescriptor(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+  private GattDescriptor() {
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(
+      UnusedPrivateParameter unused) {
+    return new GattDescriptor();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet
+  getUnknownFields() {
+    return this.unknownFields;
+  }
+  private GattDescriptor(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 8: {
+
+            id_ = input.readInt64();
+            break;
+          }
+          case 18: {
+            dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder subBuilder = null;
+            if (uuid_ != null) {
+              subBuilder = uuid_.toBuilder();
+            }
+            uuid_ = input.readMessage(dev.yanshouwang.bluetooth_low_energy.proto.UUID.parser(), extensionRegistry);
+            if (subBuilder != null) {
+              subBuilder.mergeFrom(uuid_);
+              uuid_ = subBuilder.buildPartial();
+            }
+
+            break;
+          }
+          default: {
+            if (!parseUnknownField(
+                input, unknownFields, extensionRegistry, tag)) {
+              done = true;
+            }
+            break;
+          }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(
+          e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+  public static final com.google.protobuf.Descriptors.Descriptor
+      getDescriptor() {
+    return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_GattDescriptor_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_GattDescriptor_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor.class, dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor.Builder.class);
+  }
+
+  public static final int ID_FIELD_NUMBER = 1;
+  private long id_;
+  /**
+   * <code>int64 id = 1;</code>
+   * @return The id.
+   */
+  @java.lang.Override
+  public long getId() {
+    return id_;
+  }
+
+  public static final int UUID_FIELD_NUMBER = 2;
+  private dev.yanshouwang.bluetooth_low_energy.proto.UUID uuid_;
+  /**
+   * <code>.proto.UUID uuid = 2;</code>
+   * @return Whether the uuid field is set.
+   */
+  @java.lang.Override
+  public boolean hasUuid() {
+    return uuid_ != null;
+  }
+  /**
+   * <code>.proto.UUID uuid = 2;</code>
+   * @return The uuid.
+   */
+  @java.lang.Override
+  public dev.yanshouwang.bluetooth_low_energy.proto.UUID getUuid() {
+    return uuid_ == null ? dev.yanshouwang.bluetooth_low_energy.proto.UUID.getDefaultInstance() : uuid_;
+  }
+  /**
+   * <code>.proto.UUID uuid = 2;</code>
+   */
+  @java.lang.Override
+  public dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder getUuidOrBuilder() {
+    return getUuid();
+  }
+
+  private byte memoizedIsInitialized = -1;
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output)
+                      throws java.io.IOException {
+    if (id_ != 0L) {
+      output.writeInt64(1, id_);
+    }
+    if (uuid_ != null) {
+      output.writeMessage(2, getUuid());
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (id_ != 0L) {
+      size += com.google.protobuf.CodedOutputStream
+        .computeInt64Size(1, id_);
+    }
+    if (uuid_ != null) {
+      size += com.google.protobuf.CodedOutputStream
+        .computeMessageSize(2, getUuid());
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+     return true;
+    }
+    if (!(obj instanceof dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor)) {
+      return super.equals(obj);
+    }
+    dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor other = (dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor) obj;
+
+    if (getId()
+        != other.getId()) return false;
+    if (hasUuid() != other.hasUuid()) return false;
+    if (hasUuid()) {
+      if (!getUuid()
+          .equals(other.getUuid())) return false;
+    }
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + ID_FIELD_NUMBER;
+    hash = (53 * hash) + com.google.protobuf.Internal.hashLong(
+        getId());
+    if (hasUuid()) {
+      hash = (37 * hash) + UUID_FIELD_NUMBER;
+      hash = (53 * hash) + getUuid().hashCode();
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor parseFrom(
+      java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor parseFrom(
+      java.nio.ByteBuffer data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor parseFrom(
+      byte[] data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor parseFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor parseDelimitedFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor parseFrom(
+      com.google.protobuf.CodedInputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() { return newBuilder(); }
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+  public static Builder newBuilder(dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE
+        ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(
+      com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   * Protobuf type {@code proto.GattDescriptor}
+   */
+  public static final class Builder extends
+      com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
+      // @@protoc_insertion_point(builder_implements:proto.GattDescriptor)
+      dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptorOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_GattDescriptor_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_GattDescriptor_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor.class, dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor.Builder.class);
+    }
+
+    // Construct using dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(
+        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3
+              .alwaysUseFieldBuilders) {
+      }
+    }
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      id_ = 0L;
+
+      if (uuidBuilder_ == null) {
+        uuid_ = null;
+      } else {
+        uuid_ = null;
+        uuidBuilder_ = null;
+      }
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor
+        getDescriptorForType() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_GattDescriptor_descriptor;
+    }
+
+    @java.lang.Override
+    public dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor getDefaultInstanceForType() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor build() {
+      dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor buildPartial() {
+      dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor result = new dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor(this);
+      result.id_ = id_;
+      if (uuidBuilder_ == null) {
+        result.uuid_ = uuid_;
+      } else {
+        result.uuid_ = uuidBuilder_.build();
+      }
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.setField(field, value);
+    }
+    @java.lang.Override
+    public Builder clearField(
+        com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+    @java.lang.Override
+    public Builder clearOneof(
+        com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor) {
+        return mergeFrom((dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor)other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor other) {
+      if (other == dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor.getDefaultInstance()) return this;
+      if (other.getId() != 0L) {
+        setId(other.getId());
+      }
+      if (other.hasUuid()) {
+        mergeUuid(other.getUuid());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private long id_ ;
+    /**
+     * <code>int64 id = 1;</code>
+     * @return The id.
+     */
+    @java.lang.Override
+    public long getId() {
+      return id_;
+    }
+    /**
+     * <code>int64 id = 1;</code>
+     * @param value The id to set.
+     * @return This builder for chaining.
+     */
+    public Builder setId(long value) {
+      
+      id_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>int64 id = 1;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearId() {
+      
+      id_ = 0L;
+      onChanged();
+      return this;
+    }
+
+    private dev.yanshouwang.bluetooth_low_energy.proto.UUID uuid_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+        dev.yanshouwang.bluetooth_low_energy.proto.UUID, dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder, dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder> uuidBuilder_;
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     * @return Whether the uuid field is set.
+     */
+    public boolean hasUuid() {
+      return uuidBuilder_ != null || uuid_ != null;
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     * @return The uuid.
+     */
+    public dev.yanshouwang.bluetooth_low_energy.proto.UUID getUuid() {
+      if (uuidBuilder_ == null) {
+        return uuid_ == null ? dev.yanshouwang.bluetooth_low_energy.proto.UUID.getDefaultInstance() : uuid_;
+      } else {
+        return uuidBuilder_.getMessage();
+      }
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    public Builder setUuid(dev.yanshouwang.bluetooth_low_energy.proto.UUID value) {
+      if (uuidBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        uuid_ = value;
+        onChanged();
+      } else {
+        uuidBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    public Builder setUuid(
+        dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder builderForValue) {
+      if (uuidBuilder_ == null) {
+        uuid_ = builderForValue.build();
+        onChanged();
+      } else {
+        uuidBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    public Builder mergeUuid(dev.yanshouwang.bluetooth_low_energy.proto.UUID value) {
+      if (uuidBuilder_ == null) {
+        if (uuid_ != null) {
+          uuid_ =
+            dev.yanshouwang.bluetooth_low_energy.proto.UUID.newBuilder(uuid_).mergeFrom(value).buildPartial();
+        } else {
+          uuid_ = value;
+        }
+        onChanged();
+      } else {
+        uuidBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    public Builder clearUuid() {
+      if (uuidBuilder_ == null) {
+        uuid_ = null;
+        onChanged();
+      } else {
+        uuid_ = null;
+        uuidBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    public dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder getUuidBuilder() {
+      
+      onChanged();
+      return getUuidFieldBuilder().getBuilder();
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    public dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder getUuidOrBuilder() {
+      if (uuidBuilder_ != null) {
+        return uuidBuilder_.getMessageOrBuilder();
+      } else {
+        return uuid_ == null ?
+            dev.yanshouwang.bluetooth_low_energy.proto.UUID.getDefaultInstance() : uuid_;
+      }
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+        dev.yanshouwang.bluetooth_low_energy.proto.UUID, dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder, dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder> 
+        getUuidFieldBuilder() {
+      if (uuidBuilder_ == null) {
+        uuidBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
+            dev.yanshouwang.bluetooth_low_energy.proto.UUID, dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder, dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder>(
+                getUuid(),
+                getParentForChildren(),
+                isClean());
+        uuid_ = null;
+      }
+      return uuidBuilder_;
+    }
+    @java.lang.Override
+    public final Builder setUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+
+    // @@protoc_insertion_point(builder_scope:proto.GattDescriptor)
+  }
+
+  // @@protoc_insertion_point(class_scope:proto.GattDescriptor)
+  private static final dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor DEFAULT_INSTANCE;
+  static {
+    DEFAULT_INSTANCE = new dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor();
+  }
+
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<GattDescriptor>
+      PARSER = new com.google.protobuf.AbstractParser<GattDescriptor>() {
+    @java.lang.Override
+    public GattDescriptor parsePartialFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return new GattDescriptor(input, extensionRegistry);
+    }
+  };
+
+  public static com.google.protobuf.Parser<GattDescriptor> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<GattDescriptor> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+
+}
+

android/src/main/java/dev/yanshouwang/bluetooth_low_energy/proto/GattDescriptorOrBuilder.java

@@ -0,0 +1,30 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+public interface GattDescriptorOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:proto.GattDescriptor)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   * <code>int64 id = 1;</code>
+   * @return The id.
+   */
+  long getId();
+
+  /**
+   * <code>.proto.UUID uuid = 2;</code>
+   * @return Whether the uuid field is set.
+   */
+  boolean hasUuid();
+  /**
+   * <code>.proto.UUID uuid = 2;</code>
+   * @return The uuid.
+   */
+  dev.yanshouwang.bluetooth_low_energy.proto.UUID getUuid();
+  /**
+   * <code>.proto.UUID uuid = 2;</code>
+   */
+  dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder getUuidOrBuilder();
+}

android/src/main/java/dev/yanshouwang/bluetooth_low_energy/proto/GattService.java

@@ -0,0 +1,674 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+/**
+ * Protobuf type {@code proto.GattService}
+ */
+public final class GattService extends
+    com.google.protobuf.GeneratedMessageV3 implements
+    // @@protoc_insertion_point(message_implements:proto.GattService)
+    GattServiceOrBuilder {
+private static final long serialVersionUID = 0L;
+  // Use GattService.newBuilder() to construct.
+  private GattService(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+  private GattService() {
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(
+      UnusedPrivateParameter unused) {
+    return new GattService();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet
+  getUnknownFields() {
+    return this.unknownFields;
+  }
+  private GattService(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 8: {
+
+            id_ = input.readInt64();
+            break;
+          }
+          case 18: {
+            dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder subBuilder = null;
+            if (uuid_ != null) {
+              subBuilder = uuid_.toBuilder();
+            }
+            uuid_ = input.readMessage(dev.yanshouwang.bluetooth_low_energy.proto.UUID.parser(), extensionRegistry);
+            if (subBuilder != null) {
+              subBuilder.mergeFrom(uuid_);
+              uuid_ = subBuilder.buildPartial();
+            }
+
+            break;
+          }
+          default: {
+            if (!parseUnknownField(
+                input, unknownFields, extensionRegistry, tag)) {
+              done = true;
+            }
+            break;
+          }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(
+          e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+  public static final com.google.protobuf.Descriptors.Descriptor
+      getDescriptor() {
+    return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_GattService_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_GattService_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            dev.yanshouwang.bluetooth_low_energy.proto.GattService.class, dev.yanshouwang.bluetooth_low_energy.proto.GattService.Builder.class);
+  }
+
+  public static final int ID_FIELD_NUMBER = 1;
+  private long id_;
+  /**
+   * <code>int64 id = 1;</code>
+   * @return The id.
+   */
+  @java.lang.Override
+  public long getId() {
+    return id_;
+  }
+
+  public static final int UUID_FIELD_NUMBER = 2;
+  private dev.yanshouwang.bluetooth_low_energy.proto.UUID uuid_;
+  /**
+   * <code>.proto.UUID uuid = 2;</code>
+   * @return Whether the uuid field is set.
+   */
+  @java.lang.Override
+  public boolean hasUuid() {
+    return uuid_ != null;
+  }
+  /**
+   * <code>.proto.UUID uuid = 2;</code>
+   * @return The uuid.
+   */
+  @java.lang.Override
+  public dev.yanshouwang.bluetooth_low_energy.proto.UUID getUuid() {
+    return uuid_ == null ? dev.yanshouwang.bluetooth_low_energy.proto.UUID.getDefaultInstance() : uuid_;
+  }
+  /**
+   * <code>.proto.UUID uuid = 2;</code>
+   */
+  @java.lang.Override
+  public dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder getUuidOrBuilder() {
+    return getUuid();
+  }
+
+  private byte memoizedIsInitialized = -1;
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output)
+                      throws java.io.IOException {
+    if (id_ != 0L) {
+      output.writeInt64(1, id_);
+    }
+    if (uuid_ != null) {
+      output.writeMessage(2, getUuid());
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (id_ != 0L) {
+      size += com.google.protobuf.CodedOutputStream
+        .computeInt64Size(1, id_);
+    }
+    if (uuid_ != null) {
+      size += com.google.protobuf.CodedOutputStream
+        .computeMessageSize(2, getUuid());
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+     return true;
+    }
+    if (!(obj instanceof dev.yanshouwang.bluetooth_low_energy.proto.GattService)) {
+      return super.equals(obj);
+    }
+    dev.yanshouwang.bluetooth_low_energy.proto.GattService other = (dev.yanshouwang.bluetooth_low_energy.proto.GattService) obj;
+
+    if (getId()
+        != other.getId()) return false;
+    if (hasUuid() != other.hasUuid()) return false;
+    if (hasUuid()) {
+      if (!getUuid()
+          .equals(other.getUuid())) return false;
+    }
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + ID_FIELD_NUMBER;
+    hash = (53 * hash) + com.google.protobuf.Internal.hashLong(
+        getId());
+    if (hasUuid()) {
+      hash = (37 * hash) + UUID_FIELD_NUMBER;
+      hash = (53 * hash) + getUuid().hashCode();
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattService parseFrom(
+      java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattService parseFrom(
+      java.nio.ByteBuffer data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattService parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattService parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattService parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattService parseFrom(
+      byte[] data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattService parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattService parseFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattService parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattService parseDelimitedFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattService parseFrom(
+      com.google.protobuf.CodedInputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattService parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() { return newBuilder(); }
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+  public static Builder newBuilder(dev.yanshouwang.bluetooth_low_energy.proto.GattService prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE
+        ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(
+      com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   * Protobuf type {@code proto.GattService}
+   */
+  public static final class Builder extends
+      com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
+      // @@protoc_insertion_point(builder_implements:proto.GattService)
+      dev.yanshouwang.bluetooth_low_energy.proto.GattServiceOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_GattService_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_GattService_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              dev.yanshouwang.bluetooth_low_energy.proto.GattService.class, dev.yanshouwang.bluetooth_low_energy.proto.GattService.Builder.class);
+    }
+
+    // Construct using dev.yanshouwang.bluetooth_low_energy.proto.GattService.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(
+        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3
+              .alwaysUseFieldBuilders) {
+      }
+    }
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      id_ = 0L;
+
+      if (uuidBuilder_ == null) {
+        uuid_ = null;
+      } else {
+        uuid_ = null;
+        uuidBuilder_ = null;
+      }
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor
+        getDescriptorForType() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_GattService_descriptor;
+    }
+
+    @java.lang.Override
+    public dev.yanshouwang.bluetooth_low_energy.proto.GattService getDefaultInstanceForType() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.GattService.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public dev.yanshouwang.bluetooth_low_energy.proto.GattService build() {
+      dev.yanshouwang.bluetooth_low_energy.proto.GattService result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public dev.yanshouwang.bluetooth_low_energy.proto.GattService buildPartial() {
+      dev.yanshouwang.bluetooth_low_energy.proto.GattService result = new dev.yanshouwang.bluetooth_low_energy.proto.GattService(this);
+      result.id_ = id_;
+      if (uuidBuilder_ == null) {
+        result.uuid_ = uuid_;
+      } else {
+        result.uuid_ = uuidBuilder_.build();
+      }
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.setField(field, value);
+    }
+    @java.lang.Override
+    public Builder clearField(
+        com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+    @java.lang.Override
+    public Builder clearOneof(
+        com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof dev.yanshouwang.bluetooth_low_energy.proto.GattService) {
+        return mergeFrom((dev.yanshouwang.bluetooth_low_energy.proto.GattService)other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(dev.yanshouwang.bluetooth_low_energy.proto.GattService other) {
+      if (other == dev.yanshouwang.bluetooth_low_energy.proto.GattService.getDefaultInstance()) return this;
+      if (other.getId() != 0L) {
+        setId(other.getId());
+      }
+      if (other.hasUuid()) {
+        mergeUuid(other.getUuid());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      dev.yanshouwang.bluetooth_low_energy.proto.GattService parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (dev.yanshouwang.bluetooth_low_energy.proto.GattService) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private long id_ ;
+    /**
+     * <code>int64 id = 1;</code>
+     * @return The id.
+     */
+    @java.lang.Override
+    public long getId() {
+      return id_;
+    }
+    /**
+     * <code>int64 id = 1;</code>
+     * @param value The id to set.
+     * @return This builder for chaining.
+     */
+    public Builder setId(long value) {
+      
+      id_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>int64 id = 1;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearId() {
+      
+      id_ = 0L;
+      onChanged();
+      return this;
+    }
+
+    private dev.yanshouwang.bluetooth_low_energy.proto.UUID uuid_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+        dev.yanshouwang.bluetooth_low_energy.proto.UUID, dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder, dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder> uuidBuilder_;
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     * @return Whether the uuid field is set.
+     */
+    public boolean hasUuid() {
+      return uuidBuilder_ != null || uuid_ != null;
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     * @return The uuid.
+     */
+    public dev.yanshouwang.bluetooth_low_energy.proto.UUID getUuid() {
+      if (uuidBuilder_ == null) {
+        return uuid_ == null ? dev.yanshouwang.bluetooth_low_energy.proto.UUID.getDefaultInstance() : uuid_;
+      } else {
+        return uuidBuilder_.getMessage();
+      }
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    public Builder setUuid(dev.yanshouwang.bluetooth_low_energy.proto.UUID value) {
+      if (uuidBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        uuid_ = value;
+        onChanged();
+      } else {
+        uuidBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    public Builder setUuid(
+        dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder builderForValue) {
+      if (uuidBuilder_ == null) {
+        uuid_ = builderForValue.build();
+        onChanged();
+      } else {
+        uuidBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    public Builder mergeUuid(dev.yanshouwang.bluetooth_low_energy.proto.UUID value) {
+      if (uuidBuilder_ == null) {
+        if (uuid_ != null) {
+          uuid_ =
+            dev.yanshouwang.bluetooth_low_energy.proto.UUID.newBuilder(uuid_).mergeFrom(value).buildPartial();
+        } else {
+          uuid_ = value;
+        }
+        onChanged();
+      } else {
+        uuidBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    public Builder clearUuid() {
+      if (uuidBuilder_ == null) {
+        uuid_ = null;
+        onChanged();
+      } else {
+        uuid_ = null;
+        uuidBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    public dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder getUuidBuilder() {
+      
+      onChanged();
+      return getUuidFieldBuilder().getBuilder();
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    public dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder getUuidOrBuilder() {
+      if (uuidBuilder_ != null) {
+        return uuidBuilder_.getMessageOrBuilder();
+      } else {
+        return uuid_ == null ?
+            dev.yanshouwang.bluetooth_low_energy.proto.UUID.getDefaultInstance() : uuid_;
+      }
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+        dev.yanshouwang.bluetooth_low_energy.proto.UUID, dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder, dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder> 
+        getUuidFieldBuilder() {
+      if (uuidBuilder_ == null) {
+        uuidBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
+            dev.yanshouwang.bluetooth_low_energy.proto.UUID, dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder, dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder>(
+                getUuid(),
+                getParentForChildren(),
+                isClean());
+        uuid_ = null;
+      }
+      return uuidBuilder_;
+    }
+    @java.lang.Override
+    public final Builder setUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+
+    // @@protoc_insertion_point(builder_scope:proto.GattService)
+  }
+
+  // @@protoc_insertion_point(class_scope:proto.GattService)
+  private static final dev.yanshouwang.bluetooth_low_energy.proto.GattService DEFAULT_INSTANCE;
+  static {
+    DEFAULT_INSTANCE = new dev.yanshouwang.bluetooth_low_energy.proto.GattService();
+  }
+
+  public static dev.yanshouwang.bluetooth_low_energy.proto.GattService getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<GattService>
+      PARSER = new com.google.protobuf.AbstractParser<GattService>() {
+    @java.lang.Override
+    public GattService parsePartialFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return new GattService(input, extensionRegistry);
+    }
+  };
+
+  public static com.google.protobuf.Parser<GattService> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<GattService> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public dev.yanshouwang.bluetooth_low_energy.proto.GattService getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+
+}
+

android/src/main/java/dev/yanshouwang/bluetooth_low_energy/proto/GattServiceOrBuilder.java

@@ -0,0 +1,30 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+public interface GattServiceOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:proto.GattService)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   * <code>int64 id = 1;</code>
+   * @return The id.
+   */
+  long getId();
+
+  /**
+   * <code>.proto.UUID uuid = 2;</code>
+   * @return Whether the uuid field is set.
+   */
+  boolean hasUuid();
+  /**
+   * <code>.proto.UUID uuid = 2;</code>
+   * @return The uuid.
+   */
+  dev.yanshouwang.bluetooth_low_energy.proto.UUID getUuid();
+  /**
+   * <code>.proto.UUID uuid = 2;</code>
+   */
+  dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder getUuidOrBuilder();
+}

android/src/main/java/dev/yanshouwang/bluetooth_low_energy/proto/Messages.java

@@ -0,0 +1,148 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+public final class Messages {
+  private Messages() {}
+  public static void registerAllExtensions(
+      com.google.protobuf.ExtensionRegistryLite registry) {
+  }
+
+  public static void registerAllExtensions(
+      com.google.protobuf.ExtensionRegistry registry) {
+    registerAllExtensions(
+        (com.google.protobuf.ExtensionRegistryLite) registry);
+  }
+  static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_proto_Advertisement_descriptor;
+  static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_proto_Advertisement_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_proto_Peripheral_descriptor;
+  static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_proto_Peripheral_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_proto_GattService_descriptor;
+  static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_proto_GattService_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_proto_GattCharacteristic_descriptor;
+  static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_proto_GattCharacteristic_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_proto_GattDescriptor_descriptor;
+  static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_proto_GattDescriptor_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_proto_UUID_descriptor;
+  static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_proto_UUID_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_proto_ServiceData_descriptor;
+  static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_proto_ServiceData_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_proto_BluetoothLowEnergyException_descriptor;
+  static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_proto_BluetoothLowEnergyException_fieldAccessorTable;
+
+  public static com.google.protobuf.Descriptors.FileDescriptor
+      getDescriptor() {
+    return descriptor;
+  }
+  private static  com.google.protobuf.Descriptors.FileDescriptor
+      descriptor;
+  static {
+    java.lang.String[] descriptorData = {
+      "\n\024proto/messages.proto\022\005proto\"\351\002\n\rAdvert" +
+      "isement\022\031\n\004uuid\030\001 \001(\0132\013.proto.UUID\022\014\n\004rs" +
+      "si\030\002 \001(\005\022\030\n\013connectable\030\003 \001(\010H\000\210\001\001\022\014\n\004da" +
+      "ta\030\004 \001(\014\022\027\n\nlocal_name\030\005 \001(\tH\001\210\001\001\022\"\n\032man" +
+      "ufacturer_specific_data\030\006 \001(\014\022)\n\rservice" +
+      "_datas\030\007 \003(\0132\022.proto.ServiceData\022\"\n\rserv" +
+      "ice_uuids\030\010 \003(\0132\013.proto.UUID\022,\n\027solicite" +
+      "d_service_uuids\030\t \003(\0132\013.proto.UUID\022\033\n\016tx" +
+      "_power_level\030\n \001(\005H\002\210\001\001B\016\n\014_connectableB" +
+      "\r\n\013_local_nameB\021\n\017_tx_power_level\"6\n\nPer" +
+      "ipheral\022\n\n\002id\030\001 \001(\003\022\034\n\024maximum_write_len" +
+      "gth\030\002 \001(\005\"4\n\013GattService\022\n\n\002id\030\001 \001(\003\022\031\n\004" +
+      "uuid\030\002 \001(\0132\013.proto.UUID\"\230\001\n\022GattCharacte" +
+      "ristic\022\n\n\002id\030\001 \001(\003\022\031\n\004uuid\030\002 \001(\0132\013.proto" +
+      ".UUID\022\020\n\010can_read\030\003 \001(\010\022\021\n\tcan_write\030\004 \001" +
+      "(\010\022\"\n\032can_write_without_response\030\005 \001(\010\022\022" +
+      "\n\ncan_notify\030\006 \001(\010\"7\n\016GattDescriptor\022\n\n\002" +
+      "id\030\001 \001(\003\022\031\n\004uuid\030\002 \001(\0132\013.proto.UUID\"\025\n\004U" +
+      "UID\022\r\n\005value\030\001 \001(\t\"6\n\013ServiceData\022\031\n\004uui" +
+      "d\030\001 \001(\0132\013.proto.UUID\022\014\n\004data\030\002 \001(\014\".\n\033Bl" +
+      "uetoothLowEnergyException\022\017\n\007message\030\001 \001" +
+      "(\t*r\n\016BluetoothState\022\037\n\033BLUETOOTH_STATE_" +
+      "UNSUPPORTED\020\000\022\037\n\033BLUETOOTH_STATE_POWERED" +
+      "_OFF\020\001\022\036\n\032BLUETOOTH_STATE_POWERED_ON\020\002B." +
+      "\n*dev.yanshouwang.bluetooth_low_energy.p" +
+      "rotoP\001b\006proto3"
+    };
+    descriptor = com.google.protobuf.Descriptors.FileDescriptor
+      .internalBuildGeneratedFileFrom(descriptorData,
+        new com.google.protobuf.Descriptors.FileDescriptor[] {
+        });
+    internal_static_proto_Advertisement_descriptor =
+      getDescriptor().getMessageTypes().get(0);
+    internal_static_proto_Advertisement_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_proto_Advertisement_descriptor,
+        new java.lang.String[] { "Uuid", "Rssi", "Connectable", "Data", "LocalName", "ManufacturerSpecificData", "ServiceDatas", "ServiceUuids", "SolicitedServiceUuids", "TxPowerLevel", "Connectable", "LocalName", "TxPowerLevel", });
+    internal_static_proto_Peripheral_descriptor =
+      getDescriptor().getMessageTypes().get(1);
+    internal_static_proto_Peripheral_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_proto_Peripheral_descriptor,
+        new java.lang.String[] { "Id", "MaximumWriteLength", });
+    internal_static_proto_GattService_descriptor =
+      getDescriptor().getMessageTypes().get(2);
+    internal_static_proto_GattService_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_proto_GattService_descriptor,
+        new java.lang.String[] { "Id", "Uuid", });
+    internal_static_proto_GattCharacteristic_descriptor =
+      getDescriptor().getMessageTypes().get(3);
+    internal_static_proto_GattCharacteristic_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_proto_GattCharacteristic_descriptor,
+        new java.lang.String[] { "Id", "Uuid", "CanRead", "CanWrite", "CanWriteWithoutResponse", "CanNotify", });
+    internal_static_proto_GattDescriptor_descriptor =
+      getDescriptor().getMessageTypes().get(4);
+    internal_static_proto_GattDescriptor_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_proto_GattDescriptor_descriptor,
+        new java.lang.String[] { "Id", "Uuid", });
+    internal_static_proto_UUID_descriptor =
+      getDescriptor().getMessageTypes().get(5);
+    internal_static_proto_UUID_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_proto_UUID_descriptor,
+        new java.lang.String[] { "Value", });
+    internal_static_proto_ServiceData_descriptor =
+      getDescriptor().getMessageTypes().get(6);
+    internal_static_proto_ServiceData_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_proto_ServiceData_descriptor,
+        new java.lang.String[] { "Uuid", "Data", });
+    internal_static_proto_BluetoothLowEnergyException_descriptor =
+      getDescriptor().getMessageTypes().get(7);
+    internal_static_proto_BluetoothLowEnergyException_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_proto_BluetoothLowEnergyException_descriptor,
+        new java.lang.String[] { "Message", });
+  }
+
+  // @@protoc_insertion_point(outer_class_scope)
+}

android/src/main/java/dev/yanshouwang/bluetooth_low_energy/proto/Peripheral.java

@@ -0,0 +1,550 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+/**
+ * Protobuf type {@code proto.Peripheral}
+ */
+public final class Peripheral extends
+    com.google.protobuf.GeneratedMessageV3 implements
+    // @@protoc_insertion_point(message_implements:proto.Peripheral)
+    PeripheralOrBuilder {
+private static final long serialVersionUID = 0L;
+  // Use Peripheral.newBuilder() to construct.
+  private Peripheral(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+  private Peripheral() {
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(
+      UnusedPrivateParameter unused) {
+    return new Peripheral();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet
+  getUnknownFields() {
+    return this.unknownFields;
+  }
+  private Peripheral(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
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+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(
+          e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+  public static final com.google.protobuf.Descriptors.Descriptor
+      getDescriptor() {
+    return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_Peripheral_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
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+            dev.yanshouwang.bluetooth_low_energy.proto.Peripheral.class, dev.yanshouwang.bluetooth_low_energy.proto.Peripheral.Builder.class);
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+
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+   * @return The id.
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+  private int maximumWriteLength_;
+  /**
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+   * @return The maximumWriteLength.
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+  @java.lang.Override
+  public int getMaximumWriteLength() {
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+  }
+
+  private byte memoizedIsInitialized = -1;
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
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+    memoizedIsInitialized = 1;
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+  public void writeTo(com.google.protobuf.CodedOutputStream output)
+                      throws java.io.IOException {
+    if (id_ != 0L) {
+      output.writeInt64(1, id_);
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+    if (maximumWriteLength_ != 0) {
+      output.writeInt32(2, maximumWriteLength_);
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+    unknownFields.writeTo(output);
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+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
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+        .computeInt32Size(2, maximumWriteLength_);
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+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+     return true;
+    }
+    if (!(obj instanceof dev.yanshouwang.bluetooth_low_energy.proto.Peripheral)) {
+      return super.equals(obj);
+    }
+    dev.yanshouwang.bluetooth_low_energy.proto.Peripheral other = (dev.yanshouwang.bluetooth_low_energy.proto.Peripheral) obj;
+
+    if (getId()
+        != other.getId()) return false;
+    if (getMaximumWriteLength()
+        != other.getMaximumWriteLength()) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + ID_FIELD_NUMBER;
+    hash = (53 * hash) + com.google.protobuf.Internal.hashLong(
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+    hash = (37 * hash) + MAXIMUM_WRITE_LENGTH_FIELD_NUMBER;
+    hash = (53 * hash) + getMaximumWriteLength();
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static dev.yanshouwang.bluetooth_low_energy.proto.Peripheral parseFrom(
+      java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.Peripheral parseFrom(
+      java.nio.ByteBuffer data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.Peripheral parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.Peripheral parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.Peripheral parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.Peripheral parseFrom(
+      byte[] data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.Peripheral parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.Peripheral parseFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.Peripheral parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.Peripheral parseDelimitedFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.Peripheral parseFrom(
+      com.google.protobuf.CodedInputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.Peripheral parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() { return newBuilder(); }
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+  public static Builder newBuilder(dev.yanshouwang.bluetooth_low_energy.proto.Peripheral prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE
+        ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(
+      com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   * Protobuf type {@code proto.Peripheral}
+   */
+  public static final class Builder extends
+      com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
+      // @@protoc_insertion_point(builder_implements:proto.Peripheral)
+      dev.yanshouwang.bluetooth_low_energy.proto.PeripheralOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_Peripheral_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_Peripheral_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              dev.yanshouwang.bluetooth_low_energy.proto.Peripheral.class, dev.yanshouwang.bluetooth_low_energy.proto.Peripheral.Builder.class);
+    }
+
+    // Construct using dev.yanshouwang.bluetooth_low_energy.proto.Peripheral.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(
+        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3
+              .alwaysUseFieldBuilders) {
+      }
+    }
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      id_ = 0L;
+
+      maximumWriteLength_ = 0;
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor
+        getDescriptorForType() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_Peripheral_descriptor;
+    }
+
+    @java.lang.Override
+    public dev.yanshouwang.bluetooth_low_energy.proto.Peripheral getDefaultInstanceForType() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Peripheral.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public dev.yanshouwang.bluetooth_low_energy.proto.Peripheral build() {
+      dev.yanshouwang.bluetooth_low_energy.proto.Peripheral result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public dev.yanshouwang.bluetooth_low_energy.proto.Peripheral buildPartial() {
+      dev.yanshouwang.bluetooth_low_energy.proto.Peripheral result = new dev.yanshouwang.bluetooth_low_energy.proto.Peripheral(this);
+      result.id_ = id_;
+      result.maximumWriteLength_ = maximumWriteLength_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.setField(field, value);
+    }
+    @java.lang.Override
+    public Builder clearField(
+        com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+    @java.lang.Override
+    public Builder clearOneof(
+        com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof dev.yanshouwang.bluetooth_low_energy.proto.Peripheral) {
+        return mergeFrom((dev.yanshouwang.bluetooth_low_energy.proto.Peripheral)other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(dev.yanshouwang.bluetooth_low_energy.proto.Peripheral other) {
+      if (other == dev.yanshouwang.bluetooth_low_energy.proto.Peripheral.getDefaultInstance()) return this;
+      if (other.getId() != 0L) {
+        setId(other.getId());
+      }
+      if (other.getMaximumWriteLength() != 0) {
+        setMaximumWriteLength(other.getMaximumWriteLength());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      dev.yanshouwang.bluetooth_low_energy.proto.Peripheral parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (dev.yanshouwang.bluetooth_low_energy.proto.Peripheral) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private long id_ ;
+    /**
+     * <code>int64 id = 1;</code>
+     * @return The id.
+     */
+    @java.lang.Override
+    public long getId() {
+      return id_;
+    }
+    /**
+     * <code>int64 id = 1;</code>
+     * @param value The id to set.
+     * @return This builder for chaining.
+     */
+    public Builder setId(long value) {
+      
+      id_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>int64 id = 1;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearId() {
+      
+      id_ = 0L;
+      onChanged();
+      return this;
+    }
+
+    private int maximumWriteLength_ ;
+    /**
+     * <code>int32 maximum_write_length = 2;</code>
+     * @return The maximumWriteLength.
+     */
+    @java.lang.Override
+    public int getMaximumWriteLength() {
+      return maximumWriteLength_;
+    }
+    /**
+     * <code>int32 maximum_write_length = 2;</code>
+     * @param value The maximumWriteLength to set.
+     * @return This builder for chaining.
+     */
+    public Builder setMaximumWriteLength(int value) {
+      
+      maximumWriteLength_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>int32 maximum_write_length = 2;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearMaximumWriteLength() {
+      
+      maximumWriteLength_ = 0;
+      onChanged();
+      return this;
+    }
+    @java.lang.Override
+    public final Builder setUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+
+    // @@protoc_insertion_point(builder_scope:proto.Peripheral)
+  }
+
+  // @@protoc_insertion_point(class_scope:proto.Peripheral)
+  private static final dev.yanshouwang.bluetooth_low_energy.proto.Peripheral DEFAULT_INSTANCE;
+  static {
+    DEFAULT_INSTANCE = new dev.yanshouwang.bluetooth_low_energy.proto.Peripheral();
+  }
+
+  public static dev.yanshouwang.bluetooth_low_energy.proto.Peripheral getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<Peripheral>
+      PARSER = new com.google.protobuf.AbstractParser<Peripheral>() {
+    @java.lang.Override
+    public Peripheral parsePartialFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return new Peripheral(input, extensionRegistry);
+    }
+  };
+
+  public static com.google.protobuf.Parser<Peripheral> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<Peripheral> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public dev.yanshouwang.bluetooth_low_energy.proto.Peripheral getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+
+}
+

android/src/main/java/dev/yanshouwang/bluetooth_low_energy/proto/PeripheralOrBuilder.java

@@ -0,0 +1,21 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+public interface PeripheralOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:proto.Peripheral)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   * <code>int64 id = 1;</code>
+   * @return The id.
+   */
+  long getId();
+
+  /**
+   * <code>int32 maximum_write_length = 2;</code>
+   * @return The maximumWriteLength.
+   */
+  int getMaximumWriteLength();
+}

android/src/main/java/dev/yanshouwang/bluetooth_low_energy/proto/ServiceData.java

@@ -0,0 +1,677 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+/**
+ * Protobuf type {@code proto.ServiceData}
+ */
+public final class ServiceData extends
+    com.google.protobuf.GeneratedMessageV3 implements
+    // @@protoc_insertion_point(message_implements:proto.ServiceData)
+    ServiceDataOrBuilder {
+private static final long serialVersionUID = 0L;
+  // Use ServiceData.newBuilder() to construct.
+  private ServiceData(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+  private ServiceData() {
+    data_ = com.google.protobuf.ByteString.EMPTY;
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(
+      UnusedPrivateParameter unused) {
+    return new ServiceData();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet
+  getUnknownFields() {
+    return this.unknownFields;
+  }
+  private ServiceData(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
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+      while (!done) {
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+        switch (tag) {
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+            break;
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+              uuid_ = subBuilder.buildPartial();
+            }
+
+            break;
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+
+            data_ = input.readBytes();
+            break;
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+            }
+            break;
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+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(
+          e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+  public static final com.google.protobuf.Descriptors.Descriptor
+      getDescriptor() {
+    return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_ServiceData_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_ServiceData_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            dev.yanshouwang.bluetooth_low_energy.proto.ServiceData.class, dev.yanshouwang.bluetooth_low_energy.proto.ServiceData.Builder.class);
+  }
+
+  public static final int UUID_FIELD_NUMBER = 1;
+  private dev.yanshouwang.bluetooth_low_energy.proto.UUID uuid_;
+  /**
+   * <code>.proto.UUID uuid = 1;</code>
+   * @return Whether the uuid field is set.
+   */
+  @java.lang.Override
+  public boolean hasUuid() {
+    return uuid_ != null;
+  }
+  /**
+   * <code>.proto.UUID uuid = 1;</code>
+   * @return The uuid.
+   */
+  @java.lang.Override
+  public dev.yanshouwang.bluetooth_low_energy.proto.UUID getUuid() {
+    return uuid_ == null ? dev.yanshouwang.bluetooth_low_energy.proto.UUID.getDefaultInstance() : uuid_;
+  }
+  /**
+   * <code>.proto.UUID uuid = 1;</code>
+   */
+  @java.lang.Override
+  public dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder getUuidOrBuilder() {
+    return getUuid();
+  }
+
+  public static final int DATA_FIELD_NUMBER = 2;
+  private com.google.protobuf.ByteString data_;
+  /**
+   * <code>bytes data = 2;</code>
+   * @return The data.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getData() {
+    return data_;
+  }
+
+  private byte memoizedIsInitialized = -1;
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output)
+                      throws java.io.IOException {
+    if (uuid_ != null) {
+      output.writeMessage(1, getUuid());
+    }
+    if (!data_.isEmpty()) {
+      output.writeBytes(2, data_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (uuid_ != null) {
+      size += com.google.protobuf.CodedOutputStream
+        .computeMessageSize(1, getUuid());
+    }
+    if (!data_.isEmpty()) {
+      size += com.google.protobuf.CodedOutputStream
+        .computeBytesSize(2, data_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+     return true;
+    }
+    if (!(obj instanceof dev.yanshouwang.bluetooth_low_energy.proto.ServiceData)) {
+      return super.equals(obj);
+    }
+    dev.yanshouwang.bluetooth_low_energy.proto.ServiceData other = (dev.yanshouwang.bluetooth_low_energy.proto.ServiceData) obj;
+
+    if (hasUuid() != other.hasUuid()) return false;
+    if (hasUuid()) {
+      if (!getUuid()
+          .equals(other.getUuid())) return false;
+    }
+    if (!getData()
+        .equals(other.getData())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    if (hasUuid()) {
+      hash = (37 * hash) + UUID_FIELD_NUMBER;
+      hash = (53 * hash) + getUuid().hashCode();
+    }
+    hash = (37 * hash) + DATA_FIELD_NUMBER;
+    hash = (53 * hash) + getData().hashCode();
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static dev.yanshouwang.bluetooth_low_energy.proto.ServiceData parseFrom(
+      java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.ServiceData parseFrom(
+      java.nio.ByteBuffer data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.ServiceData parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.ServiceData parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.ServiceData parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.ServiceData parseFrom(
+      byte[] data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.ServiceData parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.ServiceData parseFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.ServiceData parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.ServiceData parseDelimitedFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.ServiceData parseFrom(
+      com.google.protobuf.CodedInputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.ServiceData parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() { return newBuilder(); }
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+  public static Builder newBuilder(dev.yanshouwang.bluetooth_low_energy.proto.ServiceData prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE
+        ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(
+      com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   * Protobuf type {@code proto.ServiceData}
+   */
+  public static final class Builder extends
+      com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
+      // @@protoc_insertion_point(builder_implements:proto.ServiceData)
+      dev.yanshouwang.bluetooth_low_energy.proto.ServiceDataOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_ServiceData_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_ServiceData_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              dev.yanshouwang.bluetooth_low_energy.proto.ServiceData.class, dev.yanshouwang.bluetooth_low_energy.proto.ServiceData.Builder.class);
+    }
+
+    // Construct using dev.yanshouwang.bluetooth_low_energy.proto.ServiceData.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(
+        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3
+              .alwaysUseFieldBuilders) {
+      }
+    }
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      if (uuidBuilder_ == null) {
+        uuid_ = null;
+      } else {
+        uuid_ = null;
+        uuidBuilder_ = null;
+      }
+      data_ = com.google.protobuf.ByteString.EMPTY;
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor
+        getDescriptorForType() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_ServiceData_descriptor;
+    }
+
+    @java.lang.Override
+    public dev.yanshouwang.bluetooth_low_energy.proto.ServiceData getDefaultInstanceForType() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.ServiceData.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public dev.yanshouwang.bluetooth_low_energy.proto.ServiceData build() {
+      dev.yanshouwang.bluetooth_low_energy.proto.ServiceData result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public dev.yanshouwang.bluetooth_low_energy.proto.ServiceData buildPartial() {
+      dev.yanshouwang.bluetooth_low_energy.proto.ServiceData result = new dev.yanshouwang.bluetooth_low_energy.proto.ServiceData(this);
+      if (uuidBuilder_ == null) {
+        result.uuid_ = uuid_;
+      } else {
+        result.uuid_ = uuidBuilder_.build();
+      }
+      result.data_ = data_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.setField(field, value);
+    }
+    @java.lang.Override
+    public Builder clearField(
+        com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+    @java.lang.Override
+    public Builder clearOneof(
+        com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof dev.yanshouwang.bluetooth_low_energy.proto.ServiceData) {
+        return mergeFrom((dev.yanshouwang.bluetooth_low_energy.proto.ServiceData)other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(dev.yanshouwang.bluetooth_low_energy.proto.ServiceData other) {
+      if (other == dev.yanshouwang.bluetooth_low_energy.proto.ServiceData.getDefaultInstance()) return this;
+      if (other.hasUuid()) {
+        mergeUuid(other.getUuid());
+      }
+      if (other.getData() != com.google.protobuf.ByteString.EMPTY) {
+        setData(other.getData());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      dev.yanshouwang.bluetooth_low_energy.proto.ServiceData parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (dev.yanshouwang.bluetooth_low_energy.proto.ServiceData) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private dev.yanshouwang.bluetooth_low_energy.proto.UUID uuid_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+        dev.yanshouwang.bluetooth_low_energy.proto.UUID, dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder, dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder> uuidBuilder_;
+    /**
+     * <code>.proto.UUID uuid = 1;</code>
+     * @return Whether the uuid field is set.
+     */
+    public boolean hasUuid() {
+      return uuidBuilder_ != null || uuid_ != null;
+    }
+    /**
+     * <code>.proto.UUID uuid = 1;</code>
+     * @return The uuid.
+     */
+    public dev.yanshouwang.bluetooth_low_energy.proto.UUID getUuid() {
+      if (uuidBuilder_ == null) {
+        return uuid_ == null ? dev.yanshouwang.bluetooth_low_energy.proto.UUID.getDefaultInstance() : uuid_;
+      } else {
+        return uuidBuilder_.getMessage();
+      }
+    }
+    /**
+     * <code>.proto.UUID uuid = 1;</code>
+     */
+    public Builder setUuid(dev.yanshouwang.bluetooth_low_energy.proto.UUID value) {
+      if (uuidBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        uuid_ = value;
+        onChanged();
+      } else {
+        uuidBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     * <code>.proto.UUID uuid = 1;</code>
+     */
+    public Builder setUuid(
+        dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder builderForValue) {
+      if (uuidBuilder_ == null) {
+        uuid_ = builderForValue.build();
+        onChanged();
+      } else {
+        uuidBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     * <code>.proto.UUID uuid = 1;</code>
+     */
+    public Builder mergeUuid(dev.yanshouwang.bluetooth_low_energy.proto.UUID value) {
+      if (uuidBuilder_ == null) {
+        if (uuid_ != null) {
+          uuid_ =
+            dev.yanshouwang.bluetooth_low_energy.proto.UUID.newBuilder(uuid_).mergeFrom(value).buildPartial();
+        } else {
+          uuid_ = value;
+        }
+        onChanged();
+      } else {
+        uuidBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     * <code>.proto.UUID uuid = 1;</code>
+     */
+    public Builder clearUuid() {
+      if (uuidBuilder_ == null) {
+        uuid_ = null;
+        onChanged();
+      } else {
+        uuid_ = null;
+        uuidBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     * <code>.proto.UUID uuid = 1;</code>
+     */
+    public dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder getUuidBuilder() {
+      
+      onChanged();
+      return getUuidFieldBuilder().getBuilder();
+    }
+    /**
+     * <code>.proto.UUID uuid = 1;</code>
+     */
+    public dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder getUuidOrBuilder() {
+      if (uuidBuilder_ != null) {
+        return uuidBuilder_.getMessageOrBuilder();
+      } else {
+        return uuid_ == null ?
+            dev.yanshouwang.bluetooth_low_energy.proto.UUID.getDefaultInstance() : uuid_;
+      }
+    }
+    /**
+     * <code>.proto.UUID uuid = 1;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+        dev.yanshouwang.bluetooth_low_energy.proto.UUID, dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder, dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder> 
+        getUuidFieldBuilder() {
+      if (uuidBuilder_ == null) {
+        uuidBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
+            dev.yanshouwang.bluetooth_low_energy.proto.UUID, dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder, dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder>(
+                getUuid(),
+                getParentForChildren(),
+                isClean());
+        uuid_ = null;
+      }
+      return uuidBuilder_;
+    }
+
+    private com.google.protobuf.ByteString data_ = com.google.protobuf.ByteString.EMPTY;
+    /**
+     * <code>bytes data = 2;</code>
+     * @return The data.
+     */
+    @java.lang.Override
+    public com.google.protobuf.ByteString getData() {
+      return data_;
+    }
+    /**
+     * <code>bytes data = 2;</code>
+     * @param value The data to set.
+     * @return This builder for chaining.
+     */
+    public Builder setData(com.google.protobuf.ByteString value) {
+      if (value == null) {
+    throw new NullPointerException();
+  }
+  
+      data_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>bytes data = 2;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearData() {
+      
+      data_ = getDefaultInstance().getData();
+      onChanged();
+      return this;
+    }
+    @java.lang.Override
+    public final Builder setUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+
+    // @@protoc_insertion_point(builder_scope:proto.ServiceData)
+  }
+
+  // @@protoc_insertion_point(class_scope:proto.ServiceData)
+  private static final dev.yanshouwang.bluetooth_low_energy.proto.ServiceData DEFAULT_INSTANCE;
+  static {
+    DEFAULT_INSTANCE = new dev.yanshouwang.bluetooth_low_energy.proto.ServiceData();
+  }
+
+  public static dev.yanshouwang.bluetooth_low_energy.proto.ServiceData getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<ServiceData>
+      PARSER = new com.google.protobuf.AbstractParser<ServiceData>() {
+    @java.lang.Override
+    public ServiceData parsePartialFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return new ServiceData(input, extensionRegistry);
+    }
+  };
+
+  public static com.google.protobuf.Parser<ServiceData> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<ServiceData> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public dev.yanshouwang.bluetooth_low_energy.proto.ServiceData getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+
+}
+

android/src/main/java/dev/yanshouwang/bluetooth_low_energy/proto/ServiceDataOrBuilder.java

@@ -0,0 +1,30 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+public interface ServiceDataOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:proto.ServiceData)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   * <code>.proto.UUID uuid = 1;</code>
+   * @return Whether the uuid field is set.
+   */
+  boolean hasUuid();
+  /**
+   * <code>.proto.UUID uuid = 1;</code>
+   * @return The uuid.
+   */
+  dev.yanshouwang.bluetooth_low_energy.proto.UUID getUuid();
+  /**
+   * <code>.proto.UUID uuid = 1;</code>
+   */
+  dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder getUuidOrBuilder();
+
+  /**
+   * <code>bytes data = 2;</code>
+   * @return The data.
+   */
+  com.google.protobuf.ByteString getData();
+}

android/src/main/java/dev/yanshouwang/bluetooth_low_energy/proto/UUID.java

@@ -0,0 +1,559 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+/**
+ * Protobuf type {@code proto.UUID}
+ */
+public final class UUID extends
+    com.google.protobuf.GeneratedMessageV3 implements
+    // @@protoc_insertion_point(message_implements:proto.UUID)
+    UUIDOrBuilder {
+private static final long serialVersionUID = 0L;
+  // Use UUID.newBuilder() to construct.
+  private UUID(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+  private UUID() {
+    value_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(
+      UnusedPrivateParameter unused) {
+    return new UUID();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet
+  getUnknownFields() {
+    return this.unknownFields;
+  }
+  private UUID(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10: {
+            java.lang.String s = input.readStringRequireUtf8();
+
+            value_ = s;
+            break;
+          }
+          default: {
+            if (!parseUnknownField(
+                input, unknownFields, extensionRegistry, tag)) {
+              done = true;
+            }
+            break;
+          }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(
+          e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+  public static final com.google.protobuf.Descriptors.Descriptor
+      getDescriptor() {
+    return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_UUID_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
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+    if (!(obj instanceof dev.yanshouwang.bluetooth_low_energy.proto.UUID)) {
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+
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+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
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+    hash = (53 * hash) + getValue().hashCode();
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+  public static dev.yanshouwang.bluetooth_low_energy.proto.UUID parseFrom(
+      java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.UUID parseFrom(
+      java.nio.ByteBuffer data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.UUID parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.UUID parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.UUID parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.UUID parseFrom(
+      byte[] data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.UUID parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.UUID parseFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.UUID parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.UUID parseDelimitedFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.UUID parseFrom(
+      com.google.protobuf.CodedInputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static dev.yanshouwang.bluetooth_low_energy.proto.UUID parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() { return newBuilder(); }
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+  public static Builder newBuilder(dev.yanshouwang.bluetooth_low_energy.proto.UUID prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE
+        ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(
+      com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   * Protobuf type {@code proto.UUID}
+   */
+  public static final class Builder extends
+      com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
+      // @@protoc_insertion_point(builder_implements:proto.UUID)
+      dev.yanshouwang.bluetooth_low_energy.proto.UUIDOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_UUID_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_UUID_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              dev.yanshouwang.bluetooth_low_energy.proto.UUID.class, dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder.class);
+    }
+
+    // Construct using dev.yanshouwang.bluetooth_low_energy.proto.UUID.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(
+        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3
+              .alwaysUseFieldBuilders) {
+      }
+    }
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      value_ = "";
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor
+        getDescriptorForType() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.Messages.internal_static_proto_UUID_descriptor;
+    }
+
+    @java.lang.Override
+    public dev.yanshouwang.bluetooth_low_energy.proto.UUID getDefaultInstanceForType() {
+      return dev.yanshouwang.bluetooth_low_energy.proto.UUID.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public dev.yanshouwang.bluetooth_low_energy.proto.UUID build() {
+      dev.yanshouwang.bluetooth_low_energy.proto.UUID result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public dev.yanshouwang.bluetooth_low_energy.proto.UUID buildPartial() {
+      dev.yanshouwang.bluetooth_low_energy.proto.UUID result = new dev.yanshouwang.bluetooth_low_energy.proto.UUID(this);
+      result.value_ = value_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.setField(field, value);
+    }
+    @java.lang.Override
+    public Builder clearField(
+        com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+    @java.lang.Override
+    public Builder clearOneof(
+        com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof dev.yanshouwang.bluetooth_low_energy.proto.UUID) {
+        return mergeFrom((dev.yanshouwang.bluetooth_low_energy.proto.UUID)other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(dev.yanshouwang.bluetooth_low_energy.proto.UUID other) {
+      if (other == dev.yanshouwang.bluetooth_low_energy.proto.UUID.getDefaultInstance()) return this;
+      if (!other.getValue().isEmpty()) {
+        value_ = other.value_;
+        onChanged();
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      dev.yanshouwang.bluetooth_low_energy.proto.UUID parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (dev.yanshouwang.bluetooth_low_energy.proto.UUID) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object value_ = "";
+    /**
+     * <code>string value = 1;</code>
+     * @return The value.
+     */
+    public java.lang.String getValue() {
+      java.lang.Object ref = value_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs =
+            (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        value_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     * <code>string value = 1;</code>
+     * @return The bytes for value.
+     */
+    public com.google.protobuf.ByteString
+        getValueBytes() {
+      java.lang.Object ref = value_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b = 
+            com.google.protobuf.ByteString.copyFromUtf8(
+                (java.lang.String) ref);
+        value_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     * <code>string value = 1;</code>
+     * @param value The value to set.
+     * @return This builder for chaining.
+     */
+    public Builder setValue(
+        java.lang.String value) {
+      if (value == null) {
+    throw new NullPointerException();
+  }
+  
+      value_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string value = 1;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearValue() {
+      
+      value_ = getDefaultInstance().getValue();
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string value = 1;</code>
+     * @param value The bytes for value to set.
+     * @return This builder for chaining.
+     */
+    public Builder setValueBytes(
+        com.google.protobuf.ByteString value) {
+      if (value == null) {
+    throw new NullPointerException();
+  }
+  checkByteStringIsUtf8(value);
+      
+      value_ = value;
+      onChanged();
+      return this;
+    }
+    @java.lang.Override
+    public final Builder setUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+
+    // @@protoc_insertion_point(builder_scope:proto.UUID)
+  }
+
+  // @@protoc_insertion_point(class_scope:proto.UUID)
+  private static final dev.yanshouwang.bluetooth_low_energy.proto.UUID DEFAULT_INSTANCE;
+  static {
+    DEFAULT_INSTANCE = new dev.yanshouwang.bluetooth_low_energy.proto.UUID();
+  }
+
+  public static dev.yanshouwang.bluetooth_low_energy.proto.UUID getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<UUID>
+      PARSER = new com.google.protobuf.AbstractParser<UUID>() {
+    @java.lang.Override
+    public UUID parsePartialFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return new UUID(input, extensionRegistry);
+    }
+  };
+
+  public static com.google.protobuf.Parser<UUID> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<UUID> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public dev.yanshouwang.bluetooth_low_energy.proto.UUID getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+
+}
+

android/src/main/java/dev/yanshouwang/bluetooth_low_energy/proto/UUIDOrBuilder.java

@@ -0,0 +1,21 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+public interface UUIDOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:proto.UUID)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   * <code>string value = 1;</code>
+   * @return The value.
+   */
+  java.lang.String getValue();
+  /**
+   * <code>string value = 1;</code>
+   * @return The bytes for value.
+   */
+  com.google.protobuf.ByteString
+      getValueBytes();
+}

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/BluetoothLowEnergyException.kt

@@ -0,0 +1,3 @@
+package dev.yanshouwang.bluetooth_low_energy
+
+class BluetoothLowEnergyException(message: String) : Exception(message)

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/BluetoothLowEnergyPlugin.kt

@@ -1,599 +1,132 @@
 package dev.yanshouwang.bluetooth_low_energy
 
-import android.Manifest
-import android.bluetooth.*
-import android.bluetooth.le.*
-import android.content.BroadcastReceiver
+import android.bluetooth.BluetoothAdapter
+import android.bluetooth.BluetoothDevice
+import android.bluetooth.BluetoothManager
+import android.bluetooth.le.ScanRecord
 import android.content.Context
-import android.content.Intent
-import android.content.IntentFilter
 import android.content.pm.PackageManager
-import android.os.Build
 import android.os.Handler
-import android.os.ParcelUuid
-import android.util.Log
 import androidx.annotation.NonNull
-import androidx.core.app.ActivityCompat
 import androidx.core.content.ContextCompat
-import com.google.protobuf.ByteString
-import dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.*
-import dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.MessageCategory.*
+import dev.yanshouwang.bluetooth_low_energy.pigeon.Api
+import dev.yanshouwang.bluetooth_low_energy.proto.BluetoothState
 import io.flutter.embedding.engine.plugins.FlutterPlugin
 import io.flutter.embedding.engine.plugins.activity.ActivityAware
 import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
-import io.flutter.plugin.common.EventChannel
-import io.flutter.plugin.common.EventChannel.EventSink
-import io.flutter.plugin.common.EventChannel.StreamHandler
-import io.flutter.plugin.common.MethodCall
-import io.flutter.plugin.common.MethodChannel
-import io.flutter.plugin.common.MethodChannel.MethodCallHandler
-import io.flutter.plugin.common.MethodChannel.Result
-import io.flutter.plugin.common.PluginRegistry.RequestPermissionsResultListener
-import java.util.*
-
-const val NAMESPACE = "yanshouwang.dev/bluetooth_low_energy"
-
-typealias StartScanHandler = (code: Int) -> Unit
-typealias RequestPermissionsHandler = (granted: Boolean) -> Unit
+import java.util.concurrent.Executor
 
 /** BluetoothLowEnergyPlugin */
-class BluetoothLowEnergyPlugin : FlutterPlugin, MethodCallHandler, StreamHandler, ActivityAware, RequestPermissionsResultListener {
-    companion object {
-        private const val CLIENT_CHARACTERISTIC_CONFIG = "00002902-0000-1000-8000-00805f9b34fb"
-        private const val BLUETOOTH_ADAPTER_STATE_UNKNOWN = -1
-        private const val NO_ERROR = 0
-        private const val REQUEST_CODE = 443
-    }
-
-    private lateinit var method: MethodChannel
-    private lateinit var event: EventChannel
-    private lateinit var context: Context
-
-    private var binding: ActivityPluginBinding? = null
-    private var events: EventSink? = null
-
-    private val bluetoothAvailable by lazy { context.packageManager.hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE) }
-    private val bluetoothManager by lazy { context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager }
-    private val bluetoothAdapter by lazy { bluetoothManager.adapter }
-    private val handler by lazy { Handler(context.mainLooper) }
-
-    private val bluetoothState: BluetoothState
-        get() {
-            return if (bluetoothAvailable) bluetoothAdapter.state.messageState
-            else BluetoothState.UNSUPPORTED
-        }
-
-    private val bluetoothStateReceiver by lazy {
-        object : BroadcastReceiver() {
-            override fun onReceive(context: Context?, intent: Intent?) {
-                val oldState = intent!!.getIntExtra(BluetoothAdapter.EXTRA_PREVIOUS_STATE, BLUETOOTH_ADAPTER_STATE_UNKNOWN).messageState
-                val newState = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BLUETOOTH_ADAPTER_STATE_UNKNOWN).messageState
-                if (newState == oldState) return
-                if (newState != BluetoothState.POWERED_ON && scanning) scanning = false
-                val event = Message.newBuilder()
-                        .setCategory(BLUETOOTH_STATE)
-                        .setState(newState)
-                        .build()
-                        .toByteArray()
-                events?.success(event)
-            }
-        }
-    }
-
-    private val hasPermission
-        get() = ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED
-
-    private var requestPermissionsHandler: RequestPermissionsHandler? = null
-
-    private var scanCode = NO_ERROR
-    private var scanning = false
-
-    private val scanCallback by lazy {
-        object : ScanCallback() {
-            override fun onScanFailed(errorCode: Int) {
-                super.onScanFailed(errorCode)
-                scanCode = errorCode
-            }
-
-            override fun onScanResult(callbackType: Int, result: ScanResult?) {
-                super.onScanResult(callbackType, result)
-                if (result == null) return
-                val record = result.scanRecord
-                val advertisements =
-                        if (record == null) ByteString.EMPTY
-                        else ByteString.copyFrom(record.bytes)
-                // TODO: We can't get connectable value before Android 8.0, here we just return true
-                //  remove this useless code after the minSdkVersion set to 26 or later.
-                val connectable =
-                        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) result.isConnectable
-                        else true
-                val builder = Discovery.newBuilder()
-                        .setUuid(result.device.uuid)
-                        .setRssi(result.rssi)
-                        .setAdvertisements(advertisements)
-                        .setConnectable(connectable)
-                val discovery = builder.build()
-                val event = Message.newBuilder()
-                        .setCategory(CENTRAL_DISCOVERED)
-                        .setDiscovery(discovery)
-                        .build()
-                        .toByteArray()
-                events?.success(event)
-            }
-
-            override fun onBatchScanResults(results: MutableList<ScanResult>?) {
-                super.onBatchScanResults(results)
-                if (results == null) return
-                for (result in results) {
-                    val record = result.scanRecord
-                    val advertisements =
-                            if (record == null) ByteString.EMPTY
-                            else ByteString.copyFrom(record.bytes)
-                    // TODO: We can't get connectable value before Android 8.0, here we just return true
-                    //  remove this useless code after the minSdkVersion set to 26 or later.
-                    val connectable =
-                            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) result.isConnectable
-                            else true
-                    val builder = Discovery.newBuilder()
-                            .setUuid(result.device.uuid)
-                            .setRssi(result.rssi)
-                            .setAdvertisements(advertisements)
-                            .setConnectable(connectable)
-                    val discovery = builder.build()
-                    val event = Message.newBuilder()
-                            .setCategory(CENTRAL_DISCOVERED)
-                            .setDiscovery(discovery)
-                            .build()
-                            .toByteArray()
-                    events?.success(event)
-                }
-            }
-        }
-    }
-
-    private val nativeGATTs by lazy { mutableMapOf<String, NativeGATT>() }
-
-    private val connects by lazy { mutableMapOf<BluetoothGatt, Result>() }
-    private val maximumWriteLengths by lazy { mutableMapOf<BluetoothGatt, Int>() }
-    private val disconnects by lazy { mutableMapOf<BluetoothGatt, Result>() }
-    private val characteristicReads by lazy { mutableMapOf<BluetoothGattCharacteristic, Result>() }
-    private val characteristicWrites by lazy { mutableMapOf<BluetoothGattCharacteristic, Result>() }
-    private val descriptorReads by lazy { mutableMapOf<BluetoothGattDescriptor, Result>() }
-    private val descriptorWrites by lazy { mutableMapOf<BluetoothGattDescriptor, Result>() }
-
-    private val bluetoothGattCallback by lazy {
-        object : BluetoothGattCallback() {
-            override fun onConnectionStateChange(gatt: BluetoothGatt?, status: Int, newState: Int) {
-                super.onConnectionStateChange(gatt, status, newState)
-                when (status) {
-                    BluetoothGatt.GATT_SUCCESS -> {
-                        when (newState) {
-                            BluetoothProfile.STATE_DISCONNECTED -> {
-                                // Maybe disconnect succeed, connect failed, or connection lost when an adaptor closed event triggered.
-                                gatt!!.close()
-                                val connect = connects.remove(gatt)
-                                if (connect != null) handler.post { connect.error("GATT error with status: $status.", null, null) }
-                                else {
-                                    val nativeGATT = nativeGATTs.entries.first { entry -> entry.value.value === gatt }
-                                    nativeGATTs.remove(nativeGATT.key)
-                                    val disconnect = disconnects.remove(gatt)
-                                    if (disconnect != null) handler.post { disconnect.success() }
-                                    else {
-                                        val connectionLost = GattConnectionLost.newBuilder()
-                                                .setKey(nativeGATT.key)
-                                                .setError("GATT error with status: $status")
-                                                .build()
-                                        val event = Message.newBuilder()
-                                                .setCategory(GATT_CONNECTION_LOST)
-                                                .setConnectionLost(connectionLost)
-                                                .build()
-                                                .toByteArray()
-                                        handler.post { events?.success(event) }
-                                    }
-                                }
-                            }
-                            BluetoothProfile.STATE_CONNECTED -> {
-                                // Must be connect succeed.
-                                val requested = gatt!!.requestMtu(512)
-                                if (!requested) gatt.disconnect()
-                            }
-                            else -> throw NotImplementedError() // should never be called.
-                        }
-                    }
-                    else -> {
-                        // Maybe connect failed, disconnect failed or connection lost.
-                        gatt!!.close()
-                        val connect = connects.remove(gatt)
-                        if (connect != null) handler.post { connect.error("GATT error with status: $status", null, null) }
-                        else {
-                            val nativeGATT = nativeGATTs.entries.first { entry -> entry.value.value === gatt }
-                            nativeGATTs.remove(nativeGATT.key)
-                            val disconnect = disconnects.remove(gatt)
-                            if (disconnect != null) handler.post { disconnect.error("GATT error with status: $status", null, null) }
-                            else {
-                                val connectionLost = GattConnectionLost.newBuilder()
-                                        .setKey(nativeGATT.key)
-                                        .setError("GATT error with status: $status")
-                                        .build()
-                                val event = Message.newBuilder()
-                                        .setCategory(GATT_CONNECTION_LOST)
-                                        .setConnectionLost(connectionLost)
-                                        .build()
-                                        .toByteArray()
-                                handler.post { events?.success(event) }
-                            }
-                        }
-                    }
-                }
-            }
-
-            override fun onMtuChanged(gatt: BluetoothGatt?, mtu: Int, status: Int) {
-                super.onMtuChanged(gatt, mtu, status)
-                when (status) {
-                    BluetoothGatt.GATT_SUCCESS -> {
-                        val discovered = gatt!!.discoverServices()
-                        if (discovered) maximumWriteLengths[gatt] = mtu - 3
-                        else gatt.disconnect()
-                    }
-                    else -> gatt!!.disconnect()
-                }
-            }
-
-            override fun onServicesDiscovered(gatt: BluetoothGatt?, status: Int) {
-                super.onServicesDiscovered(gatt, status)
-                val maximumWriteLength = maximumWriteLengths.remove(gatt)!!
-                when (status) {
-                    BluetoothGatt.GATT_SUCCESS -> {
-                        val nativeServices = mutableMapOf<String, NativeGattService>()
-                        val messageServices = mutableListOf<GattService>()
-                        for (service in gatt!!.services) {
-                            val nativeCharacteristics = mutableMapOf<String, NativeGattCharacteristic>()
-                            val messageCharacteristics = mutableListOf<GattCharacteristic>()
-                            for (characteristic in service.characteristics) {
-                                val nativeDescriptors = mutableMapOf<String, NativeGattDescriptor>()
-                                val messageDescriptors = mutableListOf<GattDescriptor>()
-                                for (descriptor in characteristic.descriptors) {
-                                    // Add native descriptor.
-                                    val nativeDescriptor = NativeGattDescriptor(descriptor)
-                                    nativeDescriptors[nativeDescriptor.key] = nativeDescriptor
-                                    // Add message descriptor.
-                                    val descriptorUUID = descriptor.uuid.toString()
-                                    val messageDescriptor = GattDescriptor.newBuilder()
-                                            .setKey(nativeDescriptor.key)
-                                            .setUuid(descriptorUUID)
-                                            .build()
-                                    messageDescriptors.add(messageDescriptor)
-                                }
-                                // Add native characteristic.
-                                val nativeCharacteristic = NativeGattCharacteristic(characteristic, nativeDescriptors)
-                                nativeCharacteristics[nativeCharacteristic.key] = nativeCharacteristic
-                                // Add message characteristic.
-                                val characteristicUUID = characteristic.uuid.toString()
-                                val canRead = characteristic.properties and BluetoothGattCharacteristic.PROPERTY_READ != 0
-                                val canWrite = characteristic.properties and BluetoothGattCharacteristic.PROPERTY_WRITE != 0
-                                val canWriteWithoutResponse = characteristic.properties and BluetoothGattCharacteristic.PROPERTY_WRITE_NO_RESPONSE != 0
-                                val canNotify = characteristic.properties and BluetoothGattCharacteristic.PROPERTY_NOTIFY != 0
-                                val messageCharacteristic = GattCharacteristic.newBuilder()
-                                        .setKey(nativeCharacteristic.key)
-                                        .setUuid(characteristicUUID)
-                                        .setCanRead(canRead)
-                                        .setCanWrite(canWrite)
-                                        .setCanWriteWithoutResponse(canWriteWithoutResponse)
-                                        .setCanNotify(canNotify)
-                                        .addAllDescriptors(messageDescriptors)
-                                        .build()
-                                messageCharacteristics.add(messageCharacteristic)
-                            }
-                            // Add native service.
-                            val nativeService = NativeGattService(service, nativeCharacteristics)
-                            nativeServices[nativeService.key] = nativeService
-                            // Add message service.
-                            val serviceUUID = service.uuid.toString()
-                            val messageService = GattService.newBuilder()
-                                    .setKey(nativeService.key)
-                                    .setUuid(serviceUUID)
-                                    .addAllCharacteristics(messageCharacteristics)
-                                    .build()
-                            messageServices.add(messageService)
-                        }
-                        // Add native gatt.
-                        val nativeGATT = NativeGATT(gatt, nativeServices)
-                        nativeGATTs[nativeGATT.key] = nativeGATT
-                        // Add message gatt.
-                        val reply = GATT.newBuilder()
-                                .setKey(nativeGATT.key)
-                                .setMaximumWriteLength(maximumWriteLength)
-                                .addAllServices(messageServices)
-                                .build()
-                                .toByteArray()
-                        val connect = connects.remove(gatt)!!
-                        handler.post { connect.success(reply) }
-                    }
-                    else -> gatt!!.disconnect()
-                }
-            }
-
-            override fun onCharacteristicRead(gatt: BluetoothGatt?, characteristic: BluetoothGattCharacteristic?, status: Int) {
-                super.onCharacteristicRead(gatt, characteristic, status)
-                val read = characteristicReads.remove(characteristic)!!
-                when (status) {
-                    BluetoothGatt.GATT_SUCCESS -> handler.post { read.success(characteristic!!.value) }
-                    else -> handler.post { read.error("GATT error with status: $status", null, null) }
-                }
-            }
-
-            override fun onCharacteristicWrite(gatt: BluetoothGatt?, characteristic: BluetoothGattCharacteristic?, status: Int) {
-                super.onCharacteristicWrite(gatt, characteristic, status)
-                val write = characteristicWrites.remove(characteristic)!!
-                when (status) {
-                    BluetoothGatt.GATT_SUCCESS -> handler.post { write.success() }
-                    else -> handler.post { write.error("GATT error with status: $status", null, null) }
-                }
-            }
-
-            override fun onCharacteristicChanged(gatt: BluetoothGatt?, characteristic: BluetoothGattCharacteristic?) {
-                super.onCharacteristicChanged(gatt, characteristic)
-                val nativeGATT = nativeGATTs.values.first { entry -> entry.value === gatt }
-                val nativeService = nativeGATT.services.values.first { entry -> entry.value === characteristic!!.service }
-                val nativeCharacteristic = nativeService.characteristics.values.first { entry -> entry.value === characteristic }
-                val value = ByteString.copyFrom(characteristic!!.value)
-                val characteristicValue = GattCharacteristicValue.newBuilder()
-                        .setGattKey(nativeGATT.key)
-                        .setServiceKey(nativeService.key)
-                        .setKey(nativeCharacteristic.key)
-                        .setValue(value)
-                        .build()
-                val event = Message.newBuilder()
-                        .setCategory(GATT_CHARACTERISTIC_NOTIFY)
-                        .setCharacteristicValue(characteristicValue)
-                        .build()
-                        .toByteArray()
-                handler.post { events?.success(event) }
-            }
-
-            override fun onDescriptorRead(gatt: BluetoothGatt?, descriptor: BluetoothGattDescriptor?, status: Int) {
-                super.onDescriptorRead(gatt, descriptor, status)
-                val read = descriptorReads.remove(descriptor)!!
-                when (status) {
-                    BluetoothGatt.GATT_SUCCESS -> handler.post { read.success(descriptor!!.value) }
-                    else -> handler.post { read.error("GATT error with status: $status", null, null) }
-                }
-            }
-
-            override fun onDescriptorWrite(gatt: BluetoothGatt?, descriptor: BluetoothGattDescriptor?, status: Int) {
-                super.onDescriptorWrite(gatt, descriptor, status)
-                val write = descriptorWrites.remove(descriptor)!!
-                when (status) {
-                    BluetoothGatt.GATT_SUCCESS -> handler.post { write.success() }
-                    else -> handler.post { write.error("GATT error with status: $status", null, null) }
-                }
-            }
-        }
-    }
-
-    private fun startScan(services: List<String>, startScanHandler: StartScanHandler) {
-        val filters = services.map { service ->
-            val serviceUUID = ParcelUuid.fromString(service)
-            ScanFilter.Builder()
-                    .setServiceUuid(serviceUUID)
-                    .build()
-        }
-        val settings = ScanSettings.Builder()
-                .setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY)
-                .build()
-        bluetoothAdapter.bluetoothLeScanner.startScan(filters, settings, scanCallback)
-        // use handler.post to delay until #onScanFailed executed.
-        handler.post {
-            val code = scanCode
-            when (code) {
-                NO_ERROR -> scanning = true
-                else -> scanCode = NO_ERROR
-            }
-            startScanHandler.invoke(code)
-        }
-    }
-
-    private fun stopScan() {
-        bluetoothAdapter.bluetoothLeScanner.stopScan(scanCallback)
-        scanning = false
-    }
-
+class BluetoothLowEnergyPlugin : FlutterPlugin, ActivityAware {
     override fun onAttachedToEngine(@NonNull binding: FlutterPlugin.FlutterPluginBinding) {
-        method = MethodChannel(binding.binaryMessenger, "$NAMESPACE/method")
-        method.setMethodCallHandler(this)
-        event = EventChannel(binding.binaryMessenger, "$NAMESPACE/event")
-        event.setStreamHandler(this)
-        context = binding.applicationContext
-        // Register bluetooth adapter state receiver.
-        val adapterStateFilter = IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED)
-        context.registerReceiver(bluetoothStateReceiver, adapterStateFilter)
+        val binaryMessenger = binding.binaryMessenger
+
+        items[KEY_CENTRAL_MANAGER_FLUTTER_API] = Api.CentralManagerFlutterApi(binaryMessenger)
+        items[KEY_PERIPHERAL_FLUTTER_API] = Api.PeripheralFlutterApi(binaryMessenger)
+        items[KEY_GATT_CHARACTERISTIC_FLUTTER_API] = Api.GattCharacteristicFlutterApi(binaryMessenger)
+
+        Api.CentralManagerHostApi.setup(binaryMessenger, MyCentralManagerHostApi)
+        Api.PeripheralHostApi.setup(binaryMessenger, MyPeripheralHostApi)
+        Api.GattServiceHostApi.setup(binaryMessenger, MyGattServiceHostApi)
+        Api.GattCharacteristicHostApi.setup(binaryMessenger, MyGattCharacteristicHostApi)
+        Api.GattDescriptorHostApi.setup(binaryMessenger, MyGattDescriptorHostApi)
     }
 
     override fun onDetachedFromEngine(@NonNull binding: FlutterPlugin.FlutterPluginBinding) {
-        // Clear connections.
-        for (nativeGATT in nativeGATTs.values) nativeGATT.value.disconnect()
-        // Stop scan.
-        if (scanning) stopScan()
-        // Unregister bluetooth adapter state receiver.
-        context.unregisterReceiver(bluetoothStateReceiver)
-        event.setStreamHandler(null)
-        method.setMethodCallHandler(null)
-    }
+        val binaryMessenger = binding.binaryMessenger
 
-    override fun onMethodCall(@NonNull call: MethodCall, @NonNull result: Result) {
-        val data = call.arguments<ByteArray>()
-        val command = Message.parseFrom(data)
-        when (command.category!!) {
-            BLUETOOTH_STATE -> result.success(bluetoothState.number)
-            CENTRAL_START_DISCOVERY -> {
-                val startDiscovery = Runnable {
-                    val services = command.startDiscoveryArguments.servicesList
-                    val startScanHandler: StartScanHandler = { code ->
-                        when (code) {
-                            NO_ERROR -> result.success()
-                            else -> result.error("Discovery start failed with code: $code", null, null)
-                        }
-                    }
-                    startScan(services, startScanHandler)
-                }
-                when {
-                    hasPermission -> startDiscovery.run()
-                    else -> {
-                        requestPermissionsHandler = { granted ->
-                            if (granted) startDiscovery.run()
-                            else result.error("Discovery start failed because `ACCESS_FINE_LOCATION` was denied by user.", null, null)
-                        }
-                        val permissions = arrayOf(Manifest.permission.ACCESS_FINE_LOCATION)
-                        ActivityCompat.requestPermissions(binding!!.activity, permissions, REQUEST_CODE)
-                    }
-                }
-            }
-            CENTRAL_STOP_DISCOVERY -> {
-                stopScan()
-                result.success()
-            }
-            CENTRAL_CONNECT -> {
-                val device = bluetoothAdapter.getRemoteDevice(command.connectArguments.uuid.address)
-                val gatt = when {
-                    // Use TRANSPORT_LE to avoid none flag device on Android 23 or later.
-                    Build.VERSION.SDK_INT >= Build.VERSION_CODES.M -> device.connectGatt(context, false, bluetoothGattCallback, BluetoothDevice.TRANSPORT_LE)
-                    else -> device.connectGatt(context, false, bluetoothGattCallback)
-                }
-                connects[gatt] = result
-            }
-            GATT_DISCONNECT -> {
-                val nativeGATT = nativeGATTs[command.disconnectArguments.key]!!
-                disconnects[nativeGATT.value] = result
-                nativeGATT.value.disconnect()
-            }
-            GATT_CHARACTERISTIC_READ -> {
-                val nativeGATT = nativeGATTs[command.characteristicReadArguments.gattKey]!!
-                val nativeService = nativeGATT.services[command.characteristicReadArguments.serviceKey]!!
-                val nativeCharacteristic = nativeService.characteristics[command.characteristicReadArguments.key]!!
-                val read = nativeGATT.value.readCharacteristic(nativeCharacteristic.value)
-                if (read) characteristicReads[nativeCharacteristic.value] = result
-                else result.error("Characteristic read failed.", null, null)
-            }
-            GATT_CHARACTERISTIC_WRITE -> {
-                val nativeGATT = nativeGATTs[command.characteristicWriteArguments.gattKey]!!
-                val nativeService = nativeGATT.services[command.characteristicWriteArguments.serviceKey]!!
-                val nativeCharacteristic = nativeService.characteristics[command.characteristicWriteArguments.key]!!
-                nativeCharacteristic.value.writeType =
-                        if (command.characteristicWriteArguments.withoutResponse) BluetoothGattCharacteristic.WRITE_TYPE_NO_RESPONSE
-                        else BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT
-                nativeCharacteristic.value.value = command.characteristicWriteArguments.value.toByteArray()
-                val written = nativeGATT.value.writeCharacteristic(nativeCharacteristic.value)
-                if (written) characteristicWrites[nativeCharacteristic.value] = result
-                else result.error("Characteristic write failed.", null, null)
-            }
-            GATT_CHARACTERISTIC_NOTIFY -> {
-                val nativeGATT = nativeGATTs[command.characteristicNotifyArguments.gattKey]!!
-                val nativeService = nativeGATT.services[command.characteristicNotifyArguments.serviceKey]!!
-                val nativeCharacteristic = nativeService.characteristics[command.characteristicNotifyArguments.key]!!
-                val descriptorUUID = UUID.fromString(CLIENT_CHARACTERISTIC_CONFIG)
-                val descriptor = nativeCharacteristic.value.getDescriptor(descriptorUUID)
-                val notified = nativeGATT.value.setCharacteristicNotification(nativeCharacteristic.value, command.characteristicNotifyArguments.state)
-                if (notified) {
-                    descriptor.value =
-                            if (command.characteristicNotifyArguments.state) BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE
-                            else BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE
-                    val written = nativeGATT.value.writeDescriptor(descriptor)
-                    if (written) descriptorWrites[descriptor] = result
-                    else result.error("Client characteristic config descriptor write failed.", null, null)
-                } else result.error("Characteristic Notify failed.", null, null)
-            }
-            GATT_DESCRIPTOR_READ -> {
-                val nativeGATT = nativeGATTs[command.descriptorReadArguments.gattKey]!!
-                val nativeService = nativeGATT.services[command.descriptorReadArguments.serviceKey]!!
-                val nativeCharacteristic = nativeService.characteristics[command.descriptorReadArguments.characteristicKey]!!
-                val nativeDescriptor = nativeCharacteristic.descriptors[command.descriptorReadArguments.key]!!
-                val read = nativeGATT.value.readDescriptor(nativeDescriptor.value)
-                if (read) descriptorReads[nativeDescriptor.value] = result
-                else result.error("Descriptor read failed.", null, null)
-            }
-            GATT_DESCRIPTOR_WRITE -> {
-                val nativeGATT = nativeGATTs[command.descriptorWriteArguments.gattKey]!!
-                val nativeService = nativeGATT.services[command.descriptorWriteArguments.serviceKey]!!
-                val nativeCharacteristic = nativeService.characteristics[command.descriptorWriteArguments.characteristicKey]!!
-                val nativeDescriptor = nativeCharacteristic.descriptors[command.descriptorWriteArguments.key]!!
-                nativeDescriptor.value.value = command.descriptorWriteArguments.value.toByteArray()
-                val written = nativeGATT.value.writeDescriptor(nativeDescriptor.value)
-                if (written) descriptorWrites[nativeDescriptor.value] = result
-                else result.error("Descriptor write failed.", null, null)
-            }
-            else -> result.notImplemented()
-        }
-    }
+        items.remove(KEY_CENTRAL_MANAGER_FLUTTER_API)
+        items.remove(KEY_PERIPHERAL_FLUTTER_API)
+        items.remove(KEY_GATT_CHARACTERISTIC_FLUTTER_API)
 
-    override fun onListen(arguments: Any?, events: EventSink?) {
-        Log.d(TAG, "onListen")
-        this.events = events
-    }
-
-    override fun onCancel(arguments: Any?) {
-        Log.d(TAG, "onCancel")
-        // This must be a hot reload for now, clear all status here.
-        // Clear connections.
-        for (nativeGATT in nativeGATTs.values) nativeGATT.value.disconnect()
-        // Stop scan.
-        if (scanning) stopScan()
-        events = null
+        Api.CentralManagerHostApi.setup(binaryMessenger, null)
+        Api.PeripheralHostApi.setup(binaryMessenger, null)
+        Api.GattServiceHostApi.setup(binaryMessenger, null)
+        Api.GattCharacteristicHostApi.setup(binaryMessenger, null)
+        Api.GattDescriptorHostApi.setup(binaryMessenger, null)
     }
 
     override fun onAttachedToActivity(binding: ActivityPluginBinding) {
-        this.binding = binding
-        this.binding!!.addRequestPermissionsResultListener(this)
-    }
-
-    override fun onDetachedFromActivity() {
-        binding!!.removeRequestPermissionsResultListener(this)
-        binding = null
-    }
-
-    override fun onReattachedToActivityForConfigChanges(binding: ActivityPluginBinding) {
-        onAttachedToActivity(binding)
+        items[KEY_ACTIVITY_PLUGIN_BINDING] = binding
+        binding.addRequestPermissionsResultListener(MyRequestPermissionsResultListener)
     }
 
     override fun onDetachedFromActivityForConfigChanges() {
         onDetachedFromActivity()
     }
 
-    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>?, grantResults: IntArray?): Boolean {
-        return when {
-            requestCode != REQUEST_CODE || requestPermissionsHandler == null -> false
-            else -> {
-                val granted =
-                        grantResults != null && grantResults.all { result -> result == PackageManager.PERMISSION_GRANTED }
-                requestPermissionsHandler!!.invoke(granted)
-                requestPermissionsHandler = null
-                true
-            }
-        }
+    override fun onReattachedToActivityForConfigChanges(binding: ActivityPluginBinding) {
+        onAttachedToActivity(binding)
+    }
+
+    override fun onDetachedFromActivity() {
+        val binding = items.remove(KEY_ACTIVITY_PLUGIN_BINDING) as ActivityPluginBinding
+        binding.removeRequestPermissionsResultListener(MyRequestPermissionsResultListener)
     }
 }
 
-val Any.TAG: String
-    get() = this::class.java.simpleName
+const val KEY_CENTRAL_MANAGER_FLUTTER_API = "KEY_CENTRAL_MANAGER_FLUTTER_API"
+const val KEY_PERIPHERAL_FLUTTER_API = "KEY_PERIPHERAL_FLUTTER_API"
+const val KEY_GATT_CHARACTERISTIC_FLUTTER_API = "KEY_GATT_CHARACTERISTIC_FLUTTER_API"
+const val KEY_ACTIVITY_PLUGIN_BINDING = "KEY_ACTIVITY_PLUGIN_BINDING"
+const val REQUEST_CODE = 443
+const val KEY_AUTHORIZE_RESULT = "KEY_AUTHORIZE_RESULT"
+const val KEY_START_SCAN_ERROR = "KEY_START_SCAN_ERROR"
+const val KEY_CONNECT_RESULT = "KEY_CONNECT_RESULT"
+const val KEY_DISCONNECT_RESULT = "KEY_DISCONNECT_RESULT"
+const val KEY_DISCOVER_SERVICES_RESULT = "KEY_DISCOVER_SERVICES_RESULT"
+const val KEY_READ_RESULT = "KEY_READ_RESULT"
+const val KEY_WRITE_RESULT = "KEY_WRITE_RESULT"
+const val DATA_TYPE_MANUFACTURER_SPECIFIC_DATA = 0xFF;
 
-fun Result.success() {
-    success(null)
-}
+val items = mutableMapOf<String, Any>()
+val instances = mutableMapOf<Long, Any>()
+val identifiers = mutableMapOf<Any, Long>()
 
-val Int.messageState: BluetoothState
+val activity get() = (items[KEY_ACTIVITY_PLUGIN_BINDING] as ActivityPluginBinding).activity
+val centralFlutterApi get() = items[KEY_CENTRAL_MANAGER_FLUTTER_API] as Api.CentralManagerFlutterApi
+val peripheralFlutterApi get() = items[KEY_PERIPHERAL_FLUTTER_API] as Api.PeripheralFlutterApi
+val characteristicFlutterApi get() = items[KEY_GATT_CHARACTERISTIC_FLUTTER_API] as Api.GattCharacteristicFlutterApi
+
+val bluetoothManager get() = activity.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
+val bluetoothAdapter get() = bluetoothManager.adapter as BluetoothAdapter
+val bluetoothAvailable get() = activity.packageManager.hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)
+val mainHandler get() = Handler(activity.mainLooper)
+val mainExecutor: Executor get() = ContextCompat.getMainExecutor(activity)
+
+val Int.bluetoothState
     get() = when (this) {
-        BluetoothAdapter.STATE_OFF -> BluetoothState.POWERED_OFF
-        BluetoothAdapter.STATE_TURNING_ON -> BluetoothState.POWERED_OFF
-        BluetoothAdapter.STATE_ON -> BluetoothState.POWERED_ON
-        BluetoothAdapter.STATE_TURNING_OFF -> BluetoothState.POWERED_ON
-        else -> BluetoothState.UNRECOGNIZED
+        BluetoothAdapter.STATE_OFF -> BluetoothState.BLUETOOTH_STATE_POWERED_OFF
+        BluetoothAdapter.STATE_TURNING_ON -> BluetoothState.BLUETOOTH_STATE_POWERED_OFF
+        BluetoothAdapter.STATE_ON -> BluetoothState.BLUETOOTH_STATE_POWERED_ON
+        BluetoothAdapter.STATE_TURNING_OFF -> BluetoothState.BLUETOOTH_STATE_POWERED_ON
+        else -> throw IllegalArgumentException()
     }
 
-val BluetoothDevice.uuid: String
+val BluetoothDevice.uuidString: String
     get() {
         val node = address.filter { char -> char != ':' }.lowercase()
-        // We don't known the timestamp of the bluetooth device, use nil UUID as prefix.
-        return "00000000-0000-0000-0000-$node"
+        // We don't know the timestamp of the bluetooth device, use nil UUID as prefix.
+        return "00000000-0000-0000-$node"
     }
 
 val String.address: String
-    get() = takeLast(12).chunked(2).joinToString(":").uppercase()
+    get() = takeLast(12).chunked(2).joinToString(":").uppercase()
+
+val ScanRecord.rawManufacturerSpecificData: ByteArray?
+    get() {
+        var offset = 0;
+        while (offset < bytes.size) {
+            val length = bytes[offset++].toInt() and 0xff
+            if (length == 0) {
+                break
+            }
+            val end = offset + length
+            val type = bytes[offset++].toInt() and 0xff
+            if (type == DATA_TYPE_MANUFACTURER_SPECIFIC_DATA) {
+                return bytes.slice(offset until end).toByteArray()
+            }
+            offset = end
+        }
+        return null
+    }

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/ConnectArgumentsKt.kt

@@ -1,45 +0,0 @@
-//Generated by the protocol buffer compiler. DO NOT EDIT!
-// source: message.proto
-
-package dev.yanshouwang.bluetooth_low_energy;
-
-@kotlin.jvm.JvmSynthetic
-inline fun connectArguments(block: dev.yanshouwang.bluetooth_low_energy.ConnectArgumentsKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.ConnectArguments =
-  dev.yanshouwang.bluetooth_low_energy.ConnectArgumentsKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.ConnectArguments.newBuilder()).apply { block() }._build()
-object ConnectArgumentsKt {
-  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-  @com.google.protobuf.kotlin.ProtoDslMarker
-  class Dsl private constructor(
-    @kotlin.jvm.JvmField private val _builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.ConnectArguments.Builder
-  ) {
-    companion object {
-      @kotlin.jvm.JvmSynthetic
-      @kotlin.PublishedApi
-      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.ConnectArguments.Builder): Dsl = Dsl(builder)
-    }
-
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.PublishedApi
-    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.ConnectArguments = _builder.build()
-
-    /**
-     * <code>string uuid = 1;</code>
-     */
-    var uuid: kotlin.String
-      @JvmName("getUuid")
-      get() = _builder.getUuid()
-      @JvmName("setUuid")
-      set(value) {
-        _builder.setUuid(value)
-      }
-    /**
-     * <code>string uuid = 1;</code>
-     */
-    fun clearUuid() {
-      _builder.clearUuid()
-    }
-  }
-}
-@kotlin.jvm.JvmSynthetic
-inline fun dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.ConnectArguments.copy(block: dev.yanshouwang.bluetooth_low_energy.ConnectArgumentsKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.ConnectArguments =
-  dev.yanshouwang.bluetooth_low_energy.ConnectArgumentsKt.Dsl._create(this.toBuilder()).apply { block() }._build()

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/DiscoveryKt.kt

@@ -1,96 +0,0 @@
-//Generated by the protocol buffer compiler. DO NOT EDIT!
-// source: message.proto
-
-package dev.yanshouwang.bluetooth_low_energy;
-
-@kotlin.jvm.JvmSynthetic
-inline fun discovery(block: dev.yanshouwang.bluetooth_low_energy.DiscoveryKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.Discovery =
-  dev.yanshouwang.bluetooth_low_energy.DiscoveryKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.Discovery.newBuilder()).apply { block() }._build()
-object DiscoveryKt {
-  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-  @com.google.protobuf.kotlin.ProtoDslMarker
-  class Dsl private constructor(
-    @kotlin.jvm.JvmField private val _builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.Discovery.Builder
-  ) {
-    companion object {
-      @kotlin.jvm.JvmSynthetic
-      @kotlin.PublishedApi
-      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.Discovery.Builder): Dsl = Dsl(builder)
-    }
-
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.PublishedApi
-    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.Discovery = _builder.build()
-
-    /**
-     * <code>string uuid = 1;</code>
-     */
-    var uuid: kotlin.String
-      @JvmName("getUuid")
-      get() = _builder.getUuid()
-      @JvmName("setUuid")
-      set(value) {
-        _builder.setUuid(value)
-      }
-    /**
-     * <code>string uuid = 1;</code>
-     */
-    fun clearUuid() {
-      _builder.clearUuid()
-    }
-
-    /**
-     * <code>sint32 rssi = 2;</code>
-     */
-    var rssi: kotlin.Int
-      @JvmName("getRssi")
-      get() = _builder.getRssi()
-      @JvmName("setRssi")
-      set(value) {
-        _builder.setRssi(value)
-      }
-    /**
-     * <code>sint32 rssi = 2;</code>
-     */
-    fun clearRssi() {
-      _builder.clearRssi()
-    }
-
-    /**
-     * <code>bytes advertisements = 3;</code>
-     */
-    var advertisements: com.google.protobuf.ByteString
-      @JvmName("getAdvertisements")
-      get() = _builder.getAdvertisements()
-      @JvmName("setAdvertisements")
-      set(value) {
-        _builder.setAdvertisements(value)
-      }
-    /**
-     * <code>bytes advertisements = 3;</code>
-     */
-    fun clearAdvertisements() {
-      _builder.clearAdvertisements()
-    }
-
-    /**
-     * <code>bool connectable = 4;</code>
-     */
-    var connectable: kotlin.Boolean
-      @JvmName("getConnectable")
-      get() = _builder.getConnectable()
-      @JvmName("setConnectable")
-      set(value) {
-        _builder.setConnectable(value)
-      }
-    /**
-     * <code>bool connectable = 4;</code>
-     */
-    fun clearConnectable() {
-      _builder.clearConnectable()
-    }
-  }
-}
-@kotlin.jvm.JvmSynthetic
-inline fun dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.Discovery.copy(block: dev.yanshouwang.bluetooth_low_energy.DiscoveryKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.Discovery =
-  dev.yanshouwang.bluetooth_low_energy.DiscoveryKt.Dsl._create(this.toBuilder()).apply { block() }._build()

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/GATTKt.kt

@@ -1,125 +0,0 @@
-//Generated by the protocol buffer compiler. DO NOT EDIT!
-// source: message.proto
-
-package dev.yanshouwang.bluetooth_low_energy;
-
-@kotlin.jvm.JvmSynthetic
-inline fun gATT(block: dev.yanshouwang.bluetooth_low_energy.GATTKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GATT =
-  dev.yanshouwang.bluetooth_low_energy.GATTKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GATT.newBuilder()).apply { block() }._build()
-object GATTKt {
-  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-  @com.google.protobuf.kotlin.ProtoDslMarker
-  class Dsl private constructor(
-    @kotlin.jvm.JvmField private val _builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GATT.Builder
-  ) {
-    companion object {
-      @kotlin.jvm.JvmSynthetic
-      @kotlin.PublishedApi
-      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GATT.Builder): Dsl = Dsl(builder)
-    }
-
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.PublishedApi
-    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GATT = _builder.build()
-
-    /**
-     * <code>string key = 1;</code>
-     */
-    var key: kotlin.String
-      @JvmName("getKey")
-      get() = _builder.getKey()
-      @JvmName("setKey")
-      set(value) {
-        _builder.setKey(value)
-      }
-    /**
-     * <code>string key = 1;</code>
-     */
-    fun clearKey() {
-      _builder.clearKey()
-    }
-
-    /**
-     * <code>int32 maximumWriteLength = 2;</code>
-     */
-    var maximumWriteLength: kotlin.Int
-      @JvmName("getMaximumWriteLength")
-      get() = _builder.getMaximumWriteLength()
-      @JvmName("setMaximumWriteLength")
-      set(value) {
-        _builder.setMaximumWriteLength(value)
-      }
-    /**
-     * <code>int32 maximumWriteLength = 2;</code>
-     */
-    fun clearMaximumWriteLength() {
-      _builder.clearMaximumWriteLength()
-    }
-
-    /**
-     * An uninstantiable, behaviorless type to represent the field in
-     * generics.
-     */
-    @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-    class ServicesProxy private constructor() : com.google.protobuf.kotlin.DslProxy()
-    /**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattService services = 3;</code>
-     */
-     val services: com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService, ServicesProxy>
-      @kotlin.jvm.JvmSynthetic
-      get() = com.google.protobuf.kotlin.DslList(
-        _builder.getServicesList()
-      )
-    /**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattService services = 3;</code>
-     * @param value The services to add.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("addServices")
-    fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService, ServicesProxy>.add(value: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService) {
-      _builder.addServices(value)
-    }/**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattService services = 3;</code>
-     * @param value The services to add.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("plusAssignServices")
-    inline operator fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService, ServicesProxy>.plusAssign(value: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService) {
-      add(value)
-    }/**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattService services = 3;</code>
-     * @param values The services to add.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("addAllServices")
-    fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService, ServicesProxy>.addAll(values: kotlin.collections.Iterable<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService>) {
-      _builder.addAllServices(values)
-    }/**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattService services = 3;</code>
-     * @param values The services to add.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("plusAssignAllServices")
-    inline operator fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService, ServicesProxy>.plusAssign(values: kotlin.collections.Iterable<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService>) {
-      addAll(values)
-    }/**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattService services = 3;</code>
-     * @param index The index to set the value at.
-     * @param value The services to set.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("setServices")
-    operator fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService, ServicesProxy>.set(index: kotlin.Int, value: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService) {
-      _builder.setServices(index, value)
-    }/**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattService services = 3;</code>
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("clearServices")
-    fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService, ServicesProxy>.clear() {
-      _builder.clearServices()
-    }}
-}
-@kotlin.jvm.JvmSynthetic
-inline fun dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GATT.copy(block: dev.yanshouwang.bluetooth_low_energy.GATTKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GATT =
-  dev.yanshouwang.bluetooth_low_energy.GATTKt.Dsl._create(this.toBuilder()).apply { block() }._build()

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/GattCharacteristicKt.kt

@@ -1,193 +0,0 @@
-//Generated by the protocol buffer compiler. DO NOT EDIT!
-// source: message.proto
-
-package dev.yanshouwang.bluetooth_low_energy;
-
-@kotlin.jvm.JvmSynthetic
-inline fun gattCharacteristic(block: dev.yanshouwang.bluetooth_low_energy.GattCharacteristicKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic =
-  dev.yanshouwang.bluetooth_low_energy.GattCharacteristicKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic.newBuilder()).apply { block() }._build()
-object GattCharacteristicKt {
-  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-  @com.google.protobuf.kotlin.ProtoDslMarker
-  class Dsl private constructor(
-    @kotlin.jvm.JvmField private val _builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic.Builder
-  ) {
-    companion object {
-      @kotlin.jvm.JvmSynthetic
-      @kotlin.PublishedApi
-      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic.Builder): Dsl = Dsl(builder)
-    }
-
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.PublishedApi
-    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic = _builder.build()
-
-    /**
-     * <code>string key = 1;</code>
-     */
-    var key: kotlin.String
-      @JvmName("getKey")
-      get() = _builder.getKey()
-      @JvmName("setKey")
-      set(value) {
-        _builder.setKey(value)
-      }
-    /**
-     * <code>string key = 1;</code>
-     */
-    fun clearKey() {
-      _builder.clearKey()
-    }
-
-    /**
-     * <code>string uuid = 2;</code>
-     */
-    var uuid: kotlin.String
-      @JvmName("getUuid")
-      get() = _builder.getUuid()
-      @JvmName("setUuid")
-      set(value) {
-        _builder.setUuid(value)
-      }
-    /**
-     * <code>string uuid = 2;</code>
-     */
-    fun clearUuid() {
-      _builder.clearUuid()
-    }
-
-    /**
-     * <code>bool canRead = 3;</code>
-     */
-    var canRead: kotlin.Boolean
-      @JvmName("getCanRead")
-      get() = _builder.getCanRead()
-      @JvmName("setCanRead")
-      set(value) {
-        _builder.setCanRead(value)
-      }
-    /**
-     * <code>bool canRead = 3;</code>
-     */
-    fun clearCanRead() {
-      _builder.clearCanRead()
-    }
-
-    /**
-     * <code>bool canWrite = 4;</code>
-     */
-    var canWrite: kotlin.Boolean
-      @JvmName("getCanWrite")
-      get() = _builder.getCanWrite()
-      @JvmName("setCanWrite")
-      set(value) {
-        _builder.setCanWrite(value)
-      }
-    /**
-     * <code>bool canWrite = 4;</code>
-     */
-    fun clearCanWrite() {
-      _builder.clearCanWrite()
-    }
-
-    /**
-     * <code>bool canWriteWithoutResponse = 5;</code>
-     */
-    var canWriteWithoutResponse: kotlin.Boolean
-      @JvmName("getCanWriteWithoutResponse")
-      get() = _builder.getCanWriteWithoutResponse()
-      @JvmName("setCanWriteWithoutResponse")
-      set(value) {
-        _builder.setCanWriteWithoutResponse(value)
-      }
-    /**
-     * <code>bool canWriteWithoutResponse = 5;</code>
-     */
-    fun clearCanWriteWithoutResponse() {
-      _builder.clearCanWriteWithoutResponse()
-    }
-
-    /**
-     * <code>bool canNotify = 6;</code>
-     */
-    var canNotify: kotlin.Boolean
-      @JvmName("getCanNotify")
-      get() = _builder.getCanNotify()
-      @JvmName("setCanNotify")
-      set(value) {
-        _builder.setCanNotify(value)
-      }
-    /**
-     * <code>bool canNotify = 6;</code>
-     */
-    fun clearCanNotify() {
-      _builder.clearCanNotify()
-    }
-
-    /**
-     * An uninstantiable, behaviorless type to represent the field in
-     * generics.
-     */
-    @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-    class DescriptorsProxy private constructor() : com.google.protobuf.kotlin.DslProxy()
-    /**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattDescriptor descriptors = 7;</code>
-     */
-     val descriptors: com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor, DescriptorsProxy>
-      @kotlin.jvm.JvmSynthetic
-      get() = com.google.protobuf.kotlin.DslList(
-        _builder.getDescriptorsList()
-      )
-    /**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattDescriptor descriptors = 7;</code>
-     * @param value The descriptors to add.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("addDescriptors")
-    fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor, DescriptorsProxy>.add(value: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor) {
-      _builder.addDescriptors(value)
-    }/**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattDescriptor descriptors = 7;</code>
-     * @param value The descriptors to add.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("plusAssignDescriptors")
-    inline operator fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor, DescriptorsProxy>.plusAssign(value: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor) {
-      add(value)
-    }/**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattDescriptor descriptors = 7;</code>
-     * @param values The descriptors to add.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("addAllDescriptors")
-    fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor, DescriptorsProxy>.addAll(values: kotlin.collections.Iterable<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor>) {
-      _builder.addAllDescriptors(values)
-    }/**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattDescriptor descriptors = 7;</code>
-     * @param values The descriptors to add.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("plusAssignAllDescriptors")
-    inline operator fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor, DescriptorsProxy>.plusAssign(values: kotlin.collections.Iterable<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor>) {
-      addAll(values)
-    }/**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattDescriptor descriptors = 7;</code>
-     * @param index The index to set the value at.
-     * @param value The descriptors to set.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("setDescriptors")
-    operator fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor, DescriptorsProxy>.set(index: kotlin.Int, value: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor) {
-      _builder.setDescriptors(index, value)
-    }/**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattDescriptor descriptors = 7;</code>
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("clearDescriptors")
-    fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor, DescriptorsProxy>.clear() {
-      _builder.clearDescriptors()
-    }}
-}
-@kotlin.jvm.JvmSynthetic
-inline fun dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic.copy(block: dev.yanshouwang.bluetooth_low_energy.GattCharacteristicKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic =
-  dev.yanshouwang.bluetooth_low_energy.GattCharacteristicKt.Dsl._create(this.toBuilder()).apply { block() }._build()

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/GattCharacteristicNotifyArgumentsKt.kt

@@ -1,96 +0,0 @@
-//Generated by the protocol buffer compiler. DO NOT EDIT!
-// source: message.proto
-
-package dev.yanshouwang.bluetooth_low_energy;
-
-@kotlin.jvm.JvmSynthetic
-inline fun gattCharacteristicNotifyArguments(block: dev.yanshouwang.bluetooth_low_energy.GattCharacteristicNotifyArgumentsKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicNotifyArguments =
-  dev.yanshouwang.bluetooth_low_energy.GattCharacteristicNotifyArgumentsKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicNotifyArguments.newBuilder()).apply { block() }._build()
-object GattCharacteristicNotifyArgumentsKt {
-  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-  @com.google.protobuf.kotlin.ProtoDslMarker
-  class Dsl private constructor(
-    @kotlin.jvm.JvmField private val _builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicNotifyArguments.Builder
-  ) {
-    companion object {
-      @kotlin.jvm.JvmSynthetic
-      @kotlin.PublishedApi
-      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicNotifyArguments.Builder): Dsl = Dsl(builder)
-    }
-
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.PublishedApi
-    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicNotifyArguments = _builder.build()
-
-    /**
-     * <code>string gatt_key = 1;</code>
-     */
-    var gattKey: kotlin.String
-      @JvmName("getGattKey")
-      get() = _builder.getGattKey()
-      @JvmName("setGattKey")
-      set(value) {
-        _builder.setGattKey(value)
-      }
-    /**
-     * <code>string gatt_key = 1;</code>
-     */
-    fun clearGattKey() {
-      _builder.clearGattKey()
-    }
-
-    /**
-     * <code>string service_key = 2;</code>
-     */
-    var serviceKey: kotlin.String
-      @JvmName("getServiceKey")
-      get() = _builder.getServiceKey()
-      @JvmName("setServiceKey")
-      set(value) {
-        _builder.setServiceKey(value)
-      }
-    /**
-     * <code>string service_key = 2;</code>
-     */
-    fun clearServiceKey() {
-      _builder.clearServiceKey()
-    }
-
-    /**
-     * <code>string key = 3;</code>
-     */
-    var key: kotlin.String
-      @JvmName("getKey")
-      get() = _builder.getKey()
-      @JvmName("setKey")
-      set(value) {
-        _builder.setKey(value)
-      }
-    /**
-     * <code>string key = 3;</code>
-     */
-    fun clearKey() {
-      _builder.clearKey()
-    }
-
-    /**
-     * <code>bool state = 4;</code>
-     */
-    var state: kotlin.Boolean
-      @JvmName("getState")
-      get() = _builder.getState()
-      @JvmName("setState")
-      set(value) {
-        _builder.setState(value)
-      }
-    /**
-     * <code>bool state = 4;</code>
-     */
-    fun clearState() {
-      _builder.clearState()
-    }
-  }
-}
-@kotlin.jvm.JvmSynthetic
-inline fun dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicNotifyArguments.copy(block: dev.yanshouwang.bluetooth_low_energy.GattCharacteristicNotifyArgumentsKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicNotifyArguments =
-  dev.yanshouwang.bluetooth_low_energy.GattCharacteristicNotifyArgumentsKt.Dsl._create(this.toBuilder()).apply { block() }._build()

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/GattCharacteristicReadArgumentsKt.kt

@@ -1,79 +0,0 @@
-//Generated by the protocol buffer compiler. DO NOT EDIT!
-// source: message.proto
-
-package dev.yanshouwang.bluetooth_low_energy;
-
-@kotlin.jvm.JvmSynthetic
-inline fun gattCharacteristicReadArguments(block: dev.yanshouwang.bluetooth_low_energy.GattCharacteristicReadArgumentsKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicReadArguments =
-  dev.yanshouwang.bluetooth_low_energy.GattCharacteristicReadArgumentsKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicReadArguments.newBuilder()).apply { block() }._build()
-object GattCharacteristicReadArgumentsKt {
-  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-  @com.google.protobuf.kotlin.ProtoDslMarker
-  class Dsl private constructor(
-    @kotlin.jvm.JvmField private val _builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicReadArguments.Builder
-  ) {
-    companion object {
-      @kotlin.jvm.JvmSynthetic
-      @kotlin.PublishedApi
-      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicReadArguments.Builder): Dsl = Dsl(builder)
-    }
-
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.PublishedApi
-    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicReadArguments = _builder.build()
-
-    /**
-     * <code>string gatt_key = 1;</code>
-     */
-    var gattKey: kotlin.String
-      @JvmName("getGattKey")
-      get() = _builder.getGattKey()
-      @JvmName("setGattKey")
-      set(value) {
-        _builder.setGattKey(value)
-      }
-    /**
-     * <code>string gatt_key = 1;</code>
-     */
-    fun clearGattKey() {
-      _builder.clearGattKey()
-    }
-
-    /**
-     * <code>string service_key = 2;</code>
-     */
-    var serviceKey: kotlin.String
-      @JvmName("getServiceKey")
-      get() = _builder.getServiceKey()
-      @JvmName("setServiceKey")
-      set(value) {
-        _builder.setServiceKey(value)
-      }
-    /**
-     * <code>string service_key = 2;</code>
-     */
-    fun clearServiceKey() {
-      _builder.clearServiceKey()
-    }
-
-    /**
-     * <code>string key = 3;</code>
-     */
-    var key: kotlin.String
-      @JvmName("getKey")
-      get() = _builder.getKey()
-      @JvmName("setKey")
-      set(value) {
-        _builder.setKey(value)
-      }
-    /**
-     * <code>string key = 3;</code>
-     */
-    fun clearKey() {
-      _builder.clearKey()
-    }
-  }
-}
-@kotlin.jvm.JvmSynthetic
-inline fun dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicReadArguments.copy(block: dev.yanshouwang.bluetooth_low_energy.GattCharacteristicReadArgumentsKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicReadArguments =
-  dev.yanshouwang.bluetooth_low_energy.GattCharacteristicReadArgumentsKt.Dsl._create(this.toBuilder()).apply { block() }._build()

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/GattCharacteristicValueKt.kt

@@ -1,96 +0,0 @@
-//Generated by the protocol buffer compiler. DO NOT EDIT!
-// source: message.proto
-
-package dev.yanshouwang.bluetooth_low_energy;
-
-@kotlin.jvm.JvmSynthetic
-inline fun gattCharacteristicValue(block: dev.yanshouwang.bluetooth_low_energy.GattCharacteristicValueKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicValue =
-  dev.yanshouwang.bluetooth_low_energy.GattCharacteristicValueKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicValue.newBuilder()).apply { block() }._build()
-object GattCharacteristicValueKt {
-  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-  @com.google.protobuf.kotlin.ProtoDslMarker
-  class Dsl private constructor(
-    @kotlin.jvm.JvmField private val _builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicValue.Builder
-  ) {
-    companion object {
-      @kotlin.jvm.JvmSynthetic
-      @kotlin.PublishedApi
-      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicValue.Builder): Dsl = Dsl(builder)
-    }
-
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.PublishedApi
-    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicValue = _builder.build()
-
-    /**
-     * <code>string gatt_key = 1;</code>
-     */
-    var gattKey: kotlin.String
-      @JvmName("getGattKey")
-      get() = _builder.getGattKey()
-      @JvmName("setGattKey")
-      set(value) {
-        _builder.setGattKey(value)
-      }
-    /**
-     * <code>string gatt_key = 1;</code>
-     */
-    fun clearGattKey() {
-      _builder.clearGattKey()
-    }
-
-    /**
-     * <code>string service_key = 2;</code>
-     */
-    var serviceKey: kotlin.String
-      @JvmName("getServiceKey")
-      get() = _builder.getServiceKey()
-      @JvmName("setServiceKey")
-      set(value) {
-        _builder.setServiceKey(value)
-      }
-    /**
-     * <code>string service_key = 2;</code>
-     */
-    fun clearServiceKey() {
-      _builder.clearServiceKey()
-    }
-
-    /**
-     * <code>string key = 3;</code>
-     */
-    var key: kotlin.String
-      @JvmName("getKey")
-      get() = _builder.getKey()
-      @JvmName("setKey")
-      set(value) {
-        _builder.setKey(value)
-      }
-    /**
-     * <code>string key = 3;</code>
-     */
-    fun clearKey() {
-      _builder.clearKey()
-    }
-
-    /**
-     * <code>bytes value = 4;</code>
-     */
-    var value: com.google.protobuf.ByteString
-      @JvmName("getValue")
-      get() = _builder.getValue()
-      @JvmName("setValue")
-      set(value) {
-        _builder.setValue(value)
-      }
-    /**
-     * <code>bytes value = 4;</code>
-     */
-    fun clearValue() {
-      _builder.clearValue()
-    }
-  }
-}
-@kotlin.jvm.JvmSynthetic
-inline fun dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicValue.copy(block: dev.yanshouwang.bluetooth_low_energy.GattCharacteristicValueKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicValue =
-  dev.yanshouwang.bluetooth_low_energy.GattCharacteristicValueKt.Dsl._create(this.toBuilder()).apply { block() }._build()

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/GattCharacteristicWriteArgumentsKt.kt

@@ -1,113 +0,0 @@
-//Generated by the protocol buffer compiler. DO NOT EDIT!
-// source: message.proto
-
-package dev.yanshouwang.bluetooth_low_energy;
-
-@kotlin.jvm.JvmSynthetic
-inline fun gattCharacteristicWriteArguments(block: dev.yanshouwang.bluetooth_low_energy.GattCharacteristicWriteArgumentsKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicWriteArguments =
-  dev.yanshouwang.bluetooth_low_energy.GattCharacteristicWriteArgumentsKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicWriteArguments.newBuilder()).apply { block() }._build()
-object GattCharacteristicWriteArgumentsKt {
-  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-  @com.google.protobuf.kotlin.ProtoDslMarker
-  class Dsl private constructor(
-    @kotlin.jvm.JvmField private val _builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicWriteArguments.Builder
-  ) {
-    companion object {
-      @kotlin.jvm.JvmSynthetic
-      @kotlin.PublishedApi
-      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicWriteArguments.Builder): Dsl = Dsl(builder)
-    }
-
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.PublishedApi
-    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicWriteArguments = _builder.build()
-
-    /**
-     * <code>string gatt_key = 1;</code>
-     */
-    var gattKey: kotlin.String
-      @JvmName("getGattKey")
-      get() = _builder.getGattKey()
-      @JvmName("setGattKey")
-      set(value) {
-        _builder.setGattKey(value)
-      }
-    /**
-     * <code>string gatt_key = 1;</code>
-     */
-    fun clearGattKey() {
-      _builder.clearGattKey()
-    }
-
-    /**
-     * <code>string service_key = 2;</code>
-     */
-    var serviceKey: kotlin.String
-      @JvmName("getServiceKey")
-      get() = _builder.getServiceKey()
-      @JvmName("setServiceKey")
-      set(value) {
-        _builder.setServiceKey(value)
-      }
-    /**
-     * <code>string service_key = 2;</code>
-     */
-    fun clearServiceKey() {
-      _builder.clearServiceKey()
-    }
-
-    /**
-     * <code>string key = 3;</code>
-     */
-    var key: kotlin.String
-      @JvmName("getKey")
-      get() = _builder.getKey()
-      @JvmName("setKey")
-      set(value) {
-        _builder.setKey(value)
-      }
-    /**
-     * <code>string key = 3;</code>
-     */
-    fun clearKey() {
-      _builder.clearKey()
-    }
-
-    /**
-     * <code>bytes value = 4;</code>
-     */
-    var value: com.google.protobuf.ByteString
-      @JvmName("getValue")
-      get() = _builder.getValue()
-      @JvmName("setValue")
-      set(value) {
-        _builder.setValue(value)
-      }
-    /**
-     * <code>bytes value = 4;</code>
-     */
-    fun clearValue() {
-      _builder.clearValue()
-    }
-
-    /**
-     * <code>bool withoutResponse = 5;</code>
-     */
-    var withoutResponse: kotlin.Boolean
-      @JvmName("getWithoutResponse")
-      get() = _builder.getWithoutResponse()
-      @JvmName("setWithoutResponse")
-      set(value) {
-        _builder.setWithoutResponse(value)
-      }
-    /**
-     * <code>bool withoutResponse = 5;</code>
-     */
-    fun clearWithoutResponse() {
-      _builder.clearWithoutResponse()
-    }
-  }
-}
-@kotlin.jvm.JvmSynthetic
-inline fun dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicWriteArguments.copy(block: dev.yanshouwang.bluetooth_low_energy.GattCharacteristicWriteArgumentsKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicWriteArguments =
-  dev.yanshouwang.bluetooth_low_energy.GattCharacteristicWriteArgumentsKt.Dsl._create(this.toBuilder()).apply { block() }._build()

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/GattConnectionLostKt.kt

@@ -1,62 +0,0 @@
-//Generated by the protocol buffer compiler. DO NOT EDIT!
-// source: message.proto
-
-package dev.yanshouwang.bluetooth_low_energy;
-
-@kotlin.jvm.JvmSynthetic
-inline fun gattConnectionLost(block: dev.yanshouwang.bluetooth_low_energy.GattConnectionLostKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattConnectionLost =
-  dev.yanshouwang.bluetooth_low_energy.GattConnectionLostKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattConnectionLost.newBuilder()).apply { block() }._build()
-object GattConnectionLostKt {
-  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-  @com.google.protobuf.kotlin.ProtoDslMarker
-  class Dsl private constructor(
-    @kotlin.jvm.JvmField private val _builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattConnectionLost.Builder
-  ) {
-    companion object {
-      @kotlin.jvm.JvmSynthetic
-      @kotlin.PublishedApi
-      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattConnectionLost.Builder): Dsl = Dsl(builder)
-    }
-
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.PublishedApi
-    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattConnectionLost = _builder.build()
-
-    /**
-     * <code>string key = 1;</code>
-     */
-    var key: kotlin.String
-      @JvmName("getKey")
-      get() = _builder.getKey()
-      @JvmName("setKey")
-      set(value) {
-        _builder.setKey(value)
-      }
-    /**
-     * <code>string key = 1;</code>
-     */
-    fun clearKey() {
-      _builder.clearKey()
-    }
-
-    /**
-     * <code>string error = 2;</code>
-     */
-    var error: kotlin.String
-      @JvmName("getError")
-      get() = _builder.getError()
-      @JvmName("setError")
-      set(value) {
-        _builder.setError(value)
-      }
-    /**
-     * <code>string error = 2;</code>
-     */
-    fun clearError() {
-      _builder.clearError()
-    }
-  }
-}
-@kotlin.jvm.JvmSynthetic
-inline fun dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattConnectionLost.copy(block: dev.yanshouwang.bluetooth_low_energy.GattConnectionLostKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattConnectionLost =
-  dev.yanshouwang.bluetooth_low_energy.GattConnectionLostKt.Dsl._create(this.toBuilder()).apply { block() }._build()

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/GattDescriptorKt.kt

@@ -1,62 +0,0 @@
-//Generated by the protocol buffer compiler. DO NOT EDIT!
-// source: message.proto
-
-package dev.yanshouwang.bluetooth_low_energy;
-
-@kotlin.jvm.JvmSynthetic
-inline fun gattDescriptor(block: dev.yanshouwang.bluetooth_low_energy.GattDescriptorKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor =
-  dev.yanshouwang.bluetooth_low_energy.GattDescriptorKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor.newBuilder()).apply { block() }._build()
-object GattDescriptorKt {
-  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-  @com.google.protobuf.kotlin.ProtoDslMarker
-  class Dsl private constructor(
-    @kotlin.jvm.JvmField private val _builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor.Builder
-  ) {
-    companion object {
-      @kotlin.jvm.JvmSynthetic
-      @kotlin.PublishedApi
-      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor.Builder): Dsl = Dsl(builder)
-    }
-
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.PublishedApi
-    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor = _builder.build()
-
-    /**
-     * <code>string key = 1;</code>
-     */
-    var key: kotlin.String
-      @JvmName("getKey")
-      get() = _builder.getKey()
-      @JvmName("setKey")
-      set(value) {
-        _builder.setKey(value)
-      }
-    /**
-     * <code>string key = 1;</code>
-     */
-    fun clearKey() {
-      _builder.clearKey()
-    }
-
-    /**
-     * <code>string uuid = 2;</code>
-     */
-    var uuid: kotlin.String
-      @JvmName("getUuid")
-      get() = _builder.getUuid()
-      @JvmName("setUuid")
-      set(value) {
-        _builder.setUuid(value)
-      }
-    /**
-     * <code>string uuid = 2;</code>
-     */
-    fun clearUuid() {
-      _builder.clearUuid()
-    }
-  }
-}
-@kotlin.jvm.JvmSynthetic
-inline fun dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor.copy(block: dev.yanshouwang.bluetooth_low_energy.GattDescriptorKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptor =
-  dev.yanshouwang.bluetooth_low_energy.GattDescriptorKt.Dsl._create(this.toBuilder()).apply { block() }._build()

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/GattDescriptorReadArgumentsKt.kt

@@ -1,96 +0,0 @@
-//Generated by the protocol buffer compiler. DO NOT EDIT!
-// source: message.proto
-
-package dev.yanshouwang.bluetooth_low_energy;
-
-@kotlin.jvm.JvmSynthetic
-inline fun gattDescriptorReadArguments(block: dev.yanshouwang.bluetooth_low_energy.GattDescriptorReadArgumentsKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptorReadArguments =
-  dev.yanshouwang.bluetooth_low_energy.GattDescriptorReadArgumentsKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptorReadArguments.newBuilder()).apply { block() }._build()
-object GattDescriptorReadArgumentsKt {
-  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-  @com.google.protobuf.kotlin.ProtoDslMarker
-  class Dsl private constructor(
-    @kotlin.jvm.JvmField private val _builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptorReadArguments.Builder
-  ) {
-    companion object {
-      @kotlin.jvm.JvmSynthetic
-      @kotlin.PublishedApi
-      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptorReadArguments.Builder): Dsl = Dsl(builder)
-    }
-
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.PublishedApi
-    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptorReadArguments = _builder.build()
-
-    /**
-     * <code>string gatt_key = 1;</code>
-     */
-    var gattKey: kotlin.String
-      @JvmName("getGattKey")
-      get() = _builder.getGattKey()
-      @JvmName("setGattKey")
-      set(value) {
-        _builder.setGattKey(value)
-      }
-    /**
-     * <code>string gatt_key = 1;</code>
-     */
-    fun clearGattKey() {
-      _builder.clearGattKey()
-    }
-
-    /**
-     * <code>string service_key = 2;</code>
-     */
-    var serviceKey: kotlin.String
-      @JvmName("getServiceKey")
-      get() = _builder.getServiceKey()
-      @JvmName("setServiceKey")
-      set(value) {
-        _builder.setServiceKey(value)
-      }
-    /**
-     * <code>string service_key = 2;</code>
-     */
-    fun clearServiceKey() {
-      _builder.clearServiceKey()
-    }
-
-    /**
-     * <code>string characteristic_key = 3;</code>
-     */
-    var characteristicKey: kotlin.String
-      @JvmName("getCharacteristicKey")
-      get() = _builder.getCharacteristicKey()
-      @JvmName("setCharacteristicKey")
-      set(value) {
-        _builder.setCharacteristicKey(value)
-      }
-    /**
-     * <code>string characteristic_key = 3;</code>
-     */
-    fun clearCharacteristicKey() {
-      _builder.clearCharacteristicKey()
-    }
-
-    /**
-     * <code>string key = 4;</code>
-     */
-    var key: kotlin.String
-      @JvmName("getKey")
-      get() = _builder.getKey()
-      @JvmName("setKey")
-      set(value) {
-        _builder.setKey(value)
-      }
-    /**
-     * <code>string key = 4;</code>
-     */
-    fun clearKey() {
-      _builder.clearKey()
-    }
-  }
-}
-@kotlin.jvm.JvmSynthetic
-inline fun dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptorReadArguments.copy(block: dev.yanshouwang.bluetooth_low_energy.GattDescriptorReadArgumentsKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptorReadArguments =
-  dev.yanshouwang.bluetooth_low_energy.GattDescriptorReadArgumentsKt.Dsl._create(this.toBuilder()).apply { block() }._build()

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/GattDescriptorWriteArgumentsKt.kt

@@ -1,113 +0,0 @@
-//Generated by the protocol buffer compiler. DO NOT EDIT!
-// source: message.proto
-
-package dev.yanshouwang.bluetooth_low_energy;
-
-@kotlin.jvm.JvmSynthetic
-inline fun gattDescriptorWriteArguments(block: dev.yanshouwang.bluetooth_low_energy.GattDescriptorWriteArgumentsKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptorWriteArguments =
-  dev.yanshouwang.bluetooth_low_energy.GattDescriptorWriteArgumentsKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptorWriteArguments.newBuilder()).apply { block() }._build()
-object GattDescriptorWriteArgumentsKt {
-  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-  @com.google.protobuf.kotlin.ProtoDslMarker
-  class Dsl private constructor(
-    @kotlin.jvm.JvmField private val _builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptorWriteArguments.Builder
-  ) {
-    companion object {
-      @kotlin.jvm.JvmSynthetic
-      @kotlin.PublishedApi
-      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptorWriteArguments.Builder): Dsl = Dsl(builder)
-    }
-
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.PublishedApi
-    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptorWriteArguments = _builder.build()
-
-    /**
-     * <code>string gatt_key = 1;</code>
-     */
-    var gattKey: kotlin.String
-      @JvmName("getGattKey")
-      get() = _builder.getGattKey()
-      @JvmName("setGattKey")
-      set(value) {
-        _builder.setGattKey(value)
-      }
-    /**
-     * <code>string gatt_key = 1;</code>
-     */
-    fun clearGattKey() {
-      _builder.clearGattKey()
-    }
-
-    /**
-     * <code>string service_key = 2;</code>
-     */
-    var serviceKey: kotlin.String
-      @JvmName("getServiceKey")
-      get() = _builder.getServiceKey()
-      @JvmName("setServiceKey")
-      set(value) {
-        _builder.setServiceKey(value)
-      }
-    /**
-     * <code>string service_key = 2;</code>
-     */
-    fun clearServiceKey() {
-      _builder.clearServiceKey()
-    }
-
-    /**
-     * <code>string characteristic_key = 3;</code>
-     */
-    var characteristicKey: kotlin.String
-      @JvmName("getCharacteristicKey")
-      get() = _builder.getCharacteristicKey()
-      @JvmName("setCharacteristicKey")
-      set(value) {
-        _builder.setCharacteristicKey(value)
-      }
-    /**
-     * <code>string characteristic_key = 3;</code>
-     */
-    fun clearCharacteristicKey() {
-      _builder.clearCharacteristicKey()
-    }
-
-    /**
-     * <code>string key = 4;</code>
-     */
-    var key: kotlin.String
-      @JvmName("getKey")
-      get() = _builder.getKey()
-      @JvmName("setKey")
-      set(value) {
-        _builder.setKey(value)
-      }
-    /**
-     * <code>string key = 4;</code>
-     */
-    fun clearKey() {
-      _builder.clearKey()
-    }
-
-    /**
-     * <code>bytes value = 5;</code>
-     */
-    var value: com.google.protobuf.ByteString
-      @JvmName("getValue")
-      get() = _builder.getValue()
-      @JvmName("setValue")
-      set(value) {
-        _builder.setValue(value)
-      }
-    /**
-     * <code>bytes value = 5;</code>
-     */
-    fun clearValue() {
-      _builder.clearValue()
-    }
-  }
-}
-@kotlin.jvm.JvmSynthetic
-inline fun dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptorWriteArguments.copy(block: dev.yanshouwang.bluetooth_low_energy.GattDescriptorWriteArgumentsKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptorWriteArguments =
-  dev.yanshouwang.bluetooth_low_energy.GattDescriptorWriteArgumentsKt.Dsl._create(this.toBuilder()).apply { block() }._build()

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/GattDisconnectArgumentsKt.kt

@@ -1,45 +0,0 @@
-//Generated by the protocol buffer compiler. DO NOT EDIT!
-// source: message.proto
-
-package dev.yanshouwang.bluetooth_low_energy;
-
-@kotlin.jvm.JvmSynthetic
-inline fun gattDisconnectArguments(block: dev.yanshouwang.bluetooth_low_energy.GattDisconnectArgumentsKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDisconnectArguments =
-  dev.yanshouwang.bluetooth_low_energy.GattDisconnectArgumentsKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDisconnectArguments.newBuilder()).apply { block() }._build()
-object GattDisconnectArgumentsKt {
-  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-  @com.google.protobuf.kotlin.ProtoDslMarker
-  class Dsl private constructor(
-    @kotlin.jvm.JvmField private val _builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDisconnectArguments.Builder
-  ) {
-    companion object {
-      @kotlin.jvm.JvmSynthetic
-      @kotlin.PublishedApi
-      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDisconnectArguments.Builder): Dsl = Dsl(builder)
-    }
-
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.PublishedApi
-    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDisconnectArguments = _builder.build()
-
-    /**
-     * <code>string key = 1;</code>
-     */
-    var key: kotlin.String
-      @JvmName("getKey")
-      get() = _builder.getKey()
-      @JvmName("setKey")
-      set(value) {
-        _builder.setKey(value)
-      }
-    /**
-     * <code>string key = 1;</code>
-     */
-    fun clearKey() {
-      _builder.clearKey()
-    }
-  }
-}
-@kotlin.jvm.JvmSynthetic
-inline fun dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDisconnectArguments.copy(block: dev.yanshouwang.bluetooth_low_energy.GattDisconnectArgumentsKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDisconnectArguments =
-  dev.yanshouwang.bluetooth_low_energy.GattDisconnectArgumentsKt.Dsl._create(this.toBuilder()).apply { block() }._build()

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/GattServiceKt.kt

@@ -1,125 +0,0 @@
-//Generated by the protocol buffer compiler. DO NOT EDIT!
-// source: message.proto
-
-package dev.yanshouwang.bluetooth_low_energy;
-
-@kotlin.jvm.JvmSynthetic
-inline fun gattService(block: dev.yanshouwang.bluetooth_low_energy.GattServiceKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService =
-  dev.yanshouwang.bluetooth_low_energy.GattServiceKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService.newBuilder()).apply { block() }._build()
-object GattServiceKt {
-  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-  @com.google.protobuf.kotlin.ProtoDslMarker
-  class Dsl private constructor(
-    @kotlin.jvm.JvmField private val _builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService.Builder
-  ) {
-    companion object {
-      @kotlin.jvm.JvmSynthetic
-      @kotlin.PublishedApi
-      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService.Builder): Dsl = Dsl(builder)
-    }
-
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.PublishedApi
-    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService = _builder.build()
-
-    /**
-     * <code>string key = 1;</code>
-     */
-    var key: kotlin.String
-      @JvmName("getKey")
-      get() = _builder.getKey()
-      @JvmName("setKey")
-      set(value) {
-        _builder.setKey(value)
-      }
-    /**
-     * <code>string key = 1;</code>
-     */
-    fun clearKey() {
-      _builder.clearKey()
-    }
-
-    /**
-     * <code>string uuid = 2;</code>
-     */
-    var uuid: kotlin.String
-      @JvmName("getUuid")
-      get() = _builder.getUuid()
-      @JvmName("setUuid")
-      set(value) {
-        _builder.setUuid(value)
-      }
-    /**
-     * <code>string uuid = 2;</code>
-     */
-    fun clearUuid() {
-      _builder.clearUuid()
-    }
-
-    /**
-     * An uninstantiable, behaviorless type to represent the field in
-     * generics.
-     */
-    @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-    class CharacteristicsProxy private constructor() : com.google.protobuf.kotlin.DslProxy()
-    /**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattCharacteristic characteristics = 3;</code>
-     */
-     val characteristics: com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic, CharacteristicsProxy>
-      @kotlin.jvm.JvmSynthetic
-      get() = com.google.protobuf.kotlin.DslList(
-        _builder.getCharacteristicsList()
-      )
-    /**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattCharacteristic characteristics = 3;</code>
-     * @param value The characteristics to add.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("addCharacteristics")
-    fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic, CharacteristicsProxy>.add(value: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic) {
-      _builder.addCharacteristics(value)
-    }/**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattCharacteristic characteristics = 3;</code>
-     * @param value The characteristics to add.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("plusAssignCharacteristics")
-    inline operator fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic, CharacteristicsProxy>.plusAssign(value: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic) {
-      add(value)
-    }/**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattCharacteristic characteristics = 3;</code>
-     * @param values The characteristics to add.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("addAllCharacteristics")
-    fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic, CharacteristicsProxy>.addAll(values: kotlin.collections.Iterable<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic>) {
-      _builder.addAllCharacteristics(values)
-    }/**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattCharacteristic characteristics = 3;</code>
-     * @param values The characteristics to add.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("plusAssignAllCharacteristics")
-    inline operator fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic, CharacteristicsProxy>.plusAssign(values: kotlin.collections.Iterable<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic>) {
-      addAll(values)
-    }/**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattCharacteristic characteristics = 3;</code>
-     * @param index The index to set the value at.
-     * @param value The characteristics to set.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("setCharacteristics")
-    operator fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic, CharacteristicsProxy>.set(index: kotlin.Int, value: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic) {
-      _builder.setCharacteristics(index, value)
-    }/**
-     * <code>repeated .dev.yanshouwang.bluetooth_low_energy.GattCharacteristic characteristics = 3;</code>
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("clearCharacteristics")
-    fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristic, CharacteristicsProxy>.clear() {
-      _builder.clearCharacteristics()
-    }}
-}
-@kotlin.jvm.JvmSynthetic
-inline fun dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService.copy(block: dev.yanshouwang.bluetooth_low_energy.GattServiceKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattService =
-  dev.yanshouwang.bluetooth_low_energy.GattServiceKt.Dsl._create(this.toBuilder()).apply { block() }._build()

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/MessageKt.kt

@@ -1,340 +0,0 @@
-//Generated by the protocol buffer compiler. DO NOT EDIT!
-// source: message.proto
-
-package dev.yanshouwang.bluetooth_low_energy;
-
-@kotlin.jvm.JvmSynthetic
-inline fun message(block: dev.yanshouwang.bluetooth_low_energy.MessageKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.Message =
-  dev.yanshouwang.bluetooth_low_energy.MessageKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.Message.newBuilder()).apply { block() }._build()
-object MessageKt {
-  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-  @com.google.protobuf.kotlin.ProtoDslMarker
-  class Dsl private constructor(
-    @kotlin.jvm.JvmField private val _builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.Message.Builder
-  ) {
-    companion object {
-      @kotlin.jvm.JvmSynthetic
-      @kotlin.PublishedApi
-      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.Message.Builder): Dsl = Dsl(builder)
-    }
-
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.PublishedApi
-    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.Message = _builder.build()
-
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.MessageCategory category = 1;</code>
-     */
-    var category: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.MessageCategory
-      @JvmName("getCategory")
-      get() = _builder.getCategory()
-      @JvmName("setCategory")
-      set(value) {
-        _builder.setCategory(value)
-      }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.MessageCategory category = 1;</code>
-     */
-    fun clearCategory() {
-      _builder.clearCategory()
-    }
-
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.BluetoothState state = 2;</code>
-     */
-    var state: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.BluetoothState
-      @JvmName("getState")
-      get() = _builder.getState()
-      @JvmName("setState")
-      set(value) {
-        _builder.setState(value)
-      }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.BluetoothState state = 2;</code>
-     */
-    fun clearState() {
-      _builder.clearState()
-    }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.BluetoothState state = 2;</code>
-     * @return Whether the state field is set.
-     */
-    fun hasState(): kotlin.Boolean {
-      return _builder.hasState()
-    }
-
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.StartDiscoveryArguments startDiscoveryArguments = 3;</code>
-     */
-    var startDiscoveryArguments: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.StartDiscoveryArguments
-      @JvmName("getStartDiscoveryArguments")
-      get() = _builder.getStartDiscoveryArguments()
-      @JvmName("setStartDiscoveryArguments")
-      set(value) {
-        _builder.setStartDiscoveryArguments(value)
-      }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.StartDiscoveryArguments startDiscoveryArguments = 3;</code>
-     */
-    fun clearStartDiscoveryArguments() {
-      _builder.clearStartDiscoveryArguments()
-    }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.StartDiscoveryArguments startDiscoveryArguments = 3;</code>
-     * @return Whether the startDiscoveryArguments field is set.
-     */
-    fun hasStartDiscoveryArguments(): kotlin.Boolean {
-      return _builder.hasStartDiscoveryArguments()
-    }
-
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.Discovery discovery = 4;</code>
-     */
-    var discovery: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.Discovery
-      @JvmName("getDiscovery")
-      get() = _builder.getDiscovery()
-      @JvmName("setDiscovery")
-      set(value) {
-        _builder.setDiscovery(value)
-      }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.Discovery discovery = 4;</code>
-     */
-    fun clearDiscovery() {
-      _builder.clearDiscovery()
-    }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.Discovery discovery = 4;</code>
-     * @return Whether the discovery field is set.
-     */
-    fun hasDiscovery(): kotlin.Boolean {
-      return _builder.hasDiscovery()
-    }
-
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.ConnectArguments connectArguments = 5;</code>
-     */
-    var connectArguments: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.ConnectArguments
-      @JvmName("getConnectArguments")
-      get() = _builder.getConnectArguments()
-      @JvmName("setConnectArguments")
-      set(value) {
-        _builder.setConnectArguments(value)
-      }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.ConnectArguments connectArguments = 5;</code>
-     */
-    fun clearConnectArguments() {
-      _builder.clearConnectArguments()
-    }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.ConnectArguments connectArguments = 5;</code>
-     * @return Whether the connectArguments field is set.
-     */
-    fun hasConnectArguments(): kotlin.Boolean {
-      return _builder.hasConnectArguments()
-    }
-
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattDisconnectArguments disconnectArguments = 6;</code>
-     */
-    var disconnectArguments: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDisconnectArguments
-      @JvmName("getDisconnectArguments")
-      get() = _builder.getDisconnectArguments()
-      @JvmName("setDisconnectArguments")
-      set(value) {
-        _builder.setDisconnectArguments(value)
-      }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattDisconnectArguments disconnectArguments = 6;</code>
-     */
-    fun clearDisconnectArguments() {
-      _builder.clearDisconnectArguments()
-    }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattDisconnectArguments disconnectArguments = 6;</code>
-     * @return Whether the disconnectArguments field is set.
-     */
-    fun hasDisconnectArguments(): kotlin.Boolean {
-      return _builder.hasDisconnectArguments()
-    }
-
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattConnectionLost connectionLost = 7;</code>
-     */
-    var connectionLost: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattConnectionLost
-      @JvmName("getConnectionLost")
-      get() = _builder.getConnectionLost()
-      @JvmName("setConnectionLost")
-      set(value) {
-        _builder.setConnectionLost(value)
-      }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattConnectionLost connectionLost = 7;</code>
-     */
-    fun clearConnectionLost() {
-      _builder.clearConnectionLost()
-    }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattConnectionLost connectionLost = 7;</code>
-     * @return Whether the connectionLost field is set.
-     */
-    fun hasConnectionLost(): kotlin.Boolean {
-      return _builder.hasConnectionLost()
-    }
-
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattCharacteristicReadArguments characteristicReadArguments = 8;</code>
-     */
-    var characteristicReadArguments: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicReadArguments
-      @JvmName("getCharacteristicReadArguments")
-      get() = _builder.getCharacteristicReadArguments()
-      @JvmName("setCharacteristicReadArguments")
-      set(value) {
-        _builder.setCharacteristicReadArguments(value)
-      }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattCharacteristicReadArguments characteristicReadArguments = 8;</code>
-     */
-    fun clearCharacteristicReadArguments() {
-      _builder.clearCharacteristicReadArguments()
-    }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattCharacteristicReadArguments characteristicReadArguments = 8;</code>
-     * @return Whether the characteristicReadArguments field is set.
-     */
-    fun hasCharacteristicReadArguments(): kotlin.Boolean {
-      return _builder.hasCharacteristicReadArguments()
-    }
-
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattCharacteristicWriteArguments characteristicWriteArguments = 9;</code>
-     */
-    var characteristicWriteArguments: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicWriteArguments
-      @JvmName("getCharacteristicWriteArguments")
-      get() = _builder.getCharacteristicWriteArguments()
-      @JvmName("setCharacteristicWriteArguments")
-      set(value) {
-        _builder.setCharacteristicWriteArguments(value)
-      }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattCharacteristicWriteArguments characteristicWriteArguments = 9;</code>
-     */
-    fun clearCharacteristicWriteArguments() {
-      _builder.clearCharacteristicWriteArguments()
-    }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattCharacteristicWriteArguments characteristicWriteArguments = 9;</code>
-     * @return Whether the characteristicWriteArguments field is set.
-     */
-    fun hasCharacteristicWriteArguments(): kotlin.Boolean {
-      return _builder.hasCharacteristicWriteArguments()
-    }
-
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattCharacteristicNotifyArguments characteristicNotifyArguments = 10;</code>
-     */
-    var characteristicNotifyArguments: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicNotifyArguments
-      @JvmName("getCharacteristicNotifyArguments")
-      get() = _builder.getCharacteristicNotifyArguments()
-      @JvmName("setCharacteristicNotifyArguments")
-      set(value) {
-        _builder.setCharacteristicNotifyArguments(value)
-      }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattCharacteristicNotifyArguments characteristicNotifyArguments = 10;</code>
-     */
-    fun clearCharacteristicNotifyArguments() {
-      _builder.clearCharacteristicNotifyArguments()
-    }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattCharacteristicNotifyArguments characteristicNotifyArguments = 10;</code>
-     * @return Whether the characteristicNotifyArguments field is set.
-     */
-    fun hasCharacteristicNotifyArguments(): kotlin.Boolean {
-      return _builder.hasCharacteristicNotifyArguments()
-    }
-
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattCharacteristicValue characteristicValue = 11;</code>
-     */
-    var characteristicValue: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattCharacteristicValue
-      @JvmName("getCharacteristicValue")
-      get() = _builder.getCharacteristicValue()
-      @JvmName("setCharacteristicValue")
-      set(value) {
-        _builder.setCharacteristicValue(value)
-      }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattCharacteristicValue characteristicValue = 11;</code>
-     */
-    fun clearCharacteristicValue() {
-      _builder.clearCharacteristicValue()
-    }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattCharacteristicValue characteristicValue = 11;</code>
-     * @return Whether the characteristicValue field is set.
-     */
-    fun hasCharacteristicValue(): kotlin.Boolean {
-      return _builder.hasCharacteristicValue()
-    }
-
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattDescriptorReadArguments descriptorReadArguments = 12;</code>
-     */
-    var descriptorReadArguments: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptorReadArguments
-      @JvmName("getDescriptorReadArguments")
-      get() = _builder.getDescriptorReadArguments()
-      @JvmName("setDescriptorReadArguments")
-      set(value) {
-        _builder.setDescriptorReadArguments(value)
-      }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattDescriptorReadArguments descriptorReadArguments = 12;</code>
-     */
-    fun clearDescriptorReadArguments() {
-      _builder.clearDescriptorReadArguments()
-    }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattDescriptorReadArguments descriptorReadArguments = 12;</code>
-     * @return Whether the descriptorReadArguments field is set.
-     */
-    fun hasDescriptorReadArguments(): kotlin.Boolean {
-      return _builder.hasDescriptorReadArguments()
-    }
-
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattDescriptorWriteArguments descriptorWriteArguments = 13;</code>
-     */
-    var descriptorWriteArguments: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.GattDescriptorWriteArguments
-      @JvmName("getDescriptorWriteArguments")
-      get() = _builder.getDescriptorWriteArguments()
-      @JvmName("setDescriptorWriteArguments")
-      set(value) {
-        _builder.setDescriptorWriteArguments(value)
-      }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattDescriptorWriteArguments descriptorWriteArguments = 13;</code>
-     */
-    fun clearDescriptorWriteArguments() {
-      _builder.clearDescriptorWriteArguments()
-    }
-    /**
-     * <code>.dev.yanshouwang.bluetooth_low_energy.GattDescriptorWriteArguments descriptorWriteArguments = 13;</code>
-     * @return Whether the descriptorWriteArguments field is set.
-     */
-    fun hasDescriptorWriteArguments(): kotlin.Boolean {
-      return _builder.hasDescriptorWriteArguments()
-    }
-    val valueCase: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.Message.ValueCase
-      @JvmName("getValueCase")
-      get() = _builder.getValueCase()
-
-    fun clearValue() {
-      _builder.clearValue()
-    }
-  }
-}
-@kotlin.jvm.JvmSynthetic
-inline fun dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.Message.copy(block: dev.yanshouwang.bluetooth_low_energy.MessageKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.Message =
-  dev.yanshouwang.bluetooth_low_energy.MessageKt.Dsl._create(this.toBuilder()).apply { block() }._build()

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/MyBluetoothGattCallback.kt

@@ -0,0 +1,163 @@
+package dev.yanshouwang.bluetooth_low_energy
+
+import android.bluetooth.*
+import android.bluetooth.BluetoothGattCallback
+import dev.yanshouwang.bluetooth_low_energy.pigeon.Api
+import dev.yanshouwang.bluetooth_low_energy.proto.bluetoothLowEnergyException
+import dev.yanshouwang.bluetooth_low_energy.proto.gattService
+import dev.yanshouwang.bluetooth_low_energy.proto.peripheral
+import dev.yanshouwang.bluetooth_low_energy.proto.uUID
+
+object MyBluetoothGattCallback : BluetoothGattCallback() {
+    override fun onConnectionStateChange(gatt: BluetoothGatt, status: Int, newState: Int) {
+        super.onConnectionStateChange(gatt, status, newState)
+        if (status == BluetoothGatt.GATT_SUCCESS) {
+            if (newState == BluetoothProfile.STATE_CONNECTED) {
+                // Connect succeed.
+                val requested = gatt.requestMtu(512)
+                if (!requested) {
+                    gatt.disconnect()
+                }
+            } else {
+                // Maybe disconnect succeed, connection failed or connection lost.
+                gatt.close()
+                val connectResult = items.remove("${gatt.hashCode()}/${KEY_CONNECT_RESULT}") as Api.Result<ByteArray>?
+                if (connectResult == null) {
+                    val disconnectResult = items.remove("${gatt.hashCode()}/${KEY_DISCONNECT_RESULT}") as Api.Result<Void>?
+                    if (disconnectResult == null) {
+                        val id = identifiers[gatt] as Long
+                        val errorBuffer = bluetoothLowEnergyException {
+                            this.message = "GATT connection lost."
+                        }.toByteArray()
+                        mainExecutor.execute {
+                            peripheralFlutterApi.notifyConnectionLost(id, errorBuffer) {}
+                        }
+                    } else {
+                        disconnectResult.success(null)
+                    }
+                } else {
+                    val errorMessage = "GATT connection lost."
+                    val error = BluetoothLowEnergyException(errorMessage)
+                    connectResult.error(error)
+                }
+            }
+        } else {
+            // Maybe connect failed, disconnect failed or connection lost.
+            gatt.close()
+            val connectResult = items.remove("${gatt.hashCode()}/${KEY_CONNECT_RESULT}") as Api.Result<ByteArray>?
+            if (connectResult == null) {
+                val disconnectResult = items.remove("${gatt.hashCode()}/${KEY_DISCONNECT_RESULT}") as Api.Result<Void>?
+                if (disconnectResult == null) {
+                    val id = identifiers[gatt] as Long
+                    val errorBuffer = bluetoothLowEnergyException {
+                        this.message = "GATT error with status: $status"
+                    }.toByteArray()
+                    mainExecutor.execute {
+                        peripheralFlutterApi.notifyConnectionLost(id, errorBuffer) {}
+                    }
+                } else {
+                    val error = BluetoothLowEnergyException("GATT error with status: $status")
+                    disconnectResult.error(error)
+                }
+            } else {
+                val error = BluetoothLowEnergyException("GATT error with status: $status")
+                connectResult.error(error)
+            }
+        }
+    }
+
+    override fun onMtuChanged(gatt: BluetoothGatt, mtu: Int, status: Int) {
+        super.onMtuChanged(gatt, mtu, status)
+        when (status) {
+            BluetoothGatt.GATT_SUCCESS -> {
+                val connectResult = items.remove("${gatt.hashCode()}/${KEY_CONNECT_RESULT}") as Api.Result<ByteArray>
+                val gattId = gatt.hashCode().toLong()
+                instances[gattId] = gatt
+                val peripheralValue = peripheral {
+                    this.id = gattId
+                    this.maximumWriteLength = mtu - 3
+                }.toByteArray()
+                connectResult.success(peripheralValue)
+            }
+            else -> {
+                gatt.disconnect()
+            }
+        }
+    }
+
+    override fun onServicesDiscovered(gatt: BluetoothGatt, status: Int) {
+        super.onServicesDiscovered(gatt, status)
+        val result = items.remove("${gatt.hashCode()}/${KEY_DISCOVER_SERVICES_RESULT}") as Api.Result<MutableList<ByteArray>>
+        if (status == BluetoothGatt.GATT_SUCCESS) {
+            val serviceValues = mutableListOf<ByteArray>()
+            for (service in gatt.services) {
+                val serviceId = service.hashCode().toLong()
+                instances[serviceId] = listOf(gatt, service)
+                val serviceValue = gattService {
+                    this.id = serviceId
+                    this.uuid = uUID {
+                        this.value = service.uuid.toString()
+                    }
+                }.toByteArray()
+                serviceValues.add(serviceValue)
+            }
+            result.success(serviceValues)
+        } else {
+            val error = BluetoothLowEnergyException("GATT discover services failed with status: $status")
+            result.error(error)
+        }
+    }
+
+    override fun onCharacteristicRead(gatt: BluetoothGatt, characteristic: BluetoothGattCharacteristic, status: Int) {
+        super.onCharacteristicRead(gatt, characteristic, status)
+        val result = items.remove("${characteristic.hashCode()}/${KEY_READ_RESULT}") as Api.Result<ByteArray>
+        if (status == BluetoothGatt.GATT_SUCCESS) {
+            result.success(characteristic.value)
+        } else {
+            val error = BluetoothLowEnergyException("GATT read characteristic failed with status: $status.")
+            result.error(error)
+        }
+    }
+
+    override fun onCharacteristicWrite(gatt: BluetoothGatt, characteristic: BluetoothGattCharacteristic, status: Int) {
+        super.onCharacteristicWrite(gatt, characteristic, status)
+        val result = items.remove("${characteristic.hashCode()}/${KEY_WRITE_RESULT}") as Api.Result<Void>
+        if (status == BluetoothGatt.GATT_SUCCESS) {
+            result.success(null)
+        } else {
+            val error = BluetoothLowEnergyException("GATT write characteristic failed with status: $status.")
+            result.error(error)
+        }
+    }
+
+    override fun onCharacteristicChanged(gatt: BluetoothGatt, characteristic: BluetoothGattCharacteristic) {
+        super.onCharacteristicChanged(gatt, characteristic)
+        val id = identifiers[characteristic] as Long
+        val value = characteristic.value
+        mainExecutor.execute {
+            characteristicFlutterApi.notifyValue(id, value) {}
+        }
+    }
+
+    override fun onDescriptorRead(gatt: BluetoothGatt, descriptor: BluetoothGattDescriptor, status: Int) {
+        super.onDescriptorRead(gatt, descriptor, status)
+        val result = items.remove("${descriptor.hashCode()}/${KEY_READ_RESULT}") as Api.Result<ByteArray>
+        if (status == BluetoothGatt.GATT_SUCCESS) {
+            result.success(descriptor.value)
+        } else {
+            val error = BluetoothLowEnergyException("GATT read descriptor failed with status: $status.")
+            result.error(error)
+        }
+    }
+
+    override fun onDescriptorWrite(gatt: BluetoothGatt, descriptor: BluetoothGattDescriptor, status: Int) {
+        super.onDescriptorWrite(gatt, descriptor, status)
+        val result = items.remove("${descriptor.hashCode()}/${KEY_WRITE_RESULT}") as Api.Result<Void>
+        if (status == BluetoothGatt.GATT_SUCCESS) {
+            result.success(null)
+        } else {
+            val error = BluetoothLowEnergyException("GATT write descriptor failed with status: $status.")
+            result.error(error)
+        }
+    }
+}

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/MyBroadcastReceiver.kt

@@ -0,0 +1,19 @@
+package dev.yanshouwang.bluetooth_low_energy
+
+import android.bluetooth.BluetoothAdapter
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+
+object MyBroadcastReceiver : BroadcastReceiver() {
+    private const val STATE_UNKNOWN = -1
+
+    override fun onReceive(context: Context, intent: Intent) {
+        val previousState =
+            intent.getIntExtra(BluetoothAdapter.EXTRA_PREVIOUS_STATE, STATE_UNKNOWN).bluetoothState
+        val state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, STATE_UNKNOWN).bluetoothState
+        if (state == previousState) return
+        val stateNumber = state.number.toLong()
+        centralFlutterApi.notifyState(stateNumber) {}
+    }
+}

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/MyCentralManagerHostApi.kt

@@ -0,0 +1,87 @@
+package dev.yanshouwang.bluetooth_low_energy
+
+import android.bluetooth.BluetoothAdapter
+import android.bluetooth.BluetoothDevice
+import android.bluetooth.le.ScanFilter
+import android.bluetooth.le.ScanSettings
+import android.content.IntentFilter
+import android.content.pm.PackageManager
+import android.os.Build
+import android.os.ParcelUuid
+import androidx.core.app.ActivityCompat
+import dev.yanshouwang.bluetooth_low_energy.pigeon.Api
+import dev.yanshouwang.bluetooth_low_energy.proto.BluetoothState
+import dev.yanshouwang.bluetooth_low_energy.proto.UUID
+
+object MyCentralManagerHostApi : Api.CentralManagerHostApi {
+    override fun authorize(result: Api.Result<Boolean>) {
+        val permissions = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+            arrayOf(android.Manifest.permission.ACCESS_FINE_LOCATION, android.Manifest.permission.BLUETOOTH_SCAN, android.Manifest.permission.BLUETOOTH_CONNECT)
+        } else {
+            arrayOf(android.Manifest.permission.ACCESS_FINE_LOCATION)
+        }
+        val authorized = permissions.all { permission ->
+            ActivityCompat.checkSelfPermission(activity, permission) == PackageManager.PERMISSION_GRANTED
+        }
+        if (authorized) {
+            result.success(true)
+        } else {
+            ActivityCompat.requestPermissions(activity, permissions, REQUEST_CODE)
+            items[KEY_AUTHORIZE_RESULT] = result
+        }
+    }
+
+    override fun getState(): Long {
+        val state = if (bluetoothAvailable) {
+            bluetoothAdapter.state.bluetoothState
+        } else {
+            BluetoothState.BLUETOOTH_STATE_UNSUPPORTED
+        }
+        return state.number.toLong()
+    }
+
+    override fun addStateObserver() {
+        val filter = IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED)
+        activity.registerReceiver(MyBroadcastReceiver, filter)
+    }
+
+    override fun removeStateObserver() {
+        activity.unregisterReceiver(MyBroadcastReceiver)
+    }
+
+    override fun startScan(uuidBuffers: MutableList<ByteArray>?, result: Api.Result<Void>) {
+        val filters = uuidBuffers?.map { buffer ->
+            val uuid = UUID.parseFrom(buffer).value
+            val serviceUUID = ParcelUuid.fromString(uuid)
+            ScanFilter.Builder().setServiceUuid(serviceUUID).build()
+        }
+        val settings = ScanSettings.Builder().setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY).build()
+        bluetoothAdapter.bluetoothLeScanner.startScan(filters, settings, MyScanCallback)
+        // Use main handler.post to delay until ScanCallback.onScanFailed executed.
+        mainHandler.post {
+            val error = items.remove(KEY_START_SCAN_ERROR) as Throwable?
+            if (error == null) {
+                result.success(null)
+            } else {
+                result.error(error)
+            }
+        }
+    }
+
+    override fun stopScan() {
+        bluetoothAdapter.bluetoothLeScanner.stopScan(MyScanCallback)
+    }
+
+    override fun connect(uuidBuffer: ByteArray, result: Api.Result<ByteArray>) {
+        val address = UUID.parseFrom(uuidBuffer).value.address
+        val device = bluetoothAdapter.getRemoteDevice(address)
+        val autoConnect = false
+        val gatt = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            val transport = BluetoothDevice.TRANSPORT_LE
+            device.connectGatt(activity, autoConnect, MyBluetoothGattCallback, transport)
+        } else {
+            device.connectGatt(activity, autoConnect, MyBluetoothGattCallback)
+        }
+        items["${gatt.hashCode()}/${KEY_CONNECT_RESULT}"] = result
+    }
+}

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/MyGattCharacteristicHostApi.kt

@@ -0,0 +1,103 @@
+package dev.yanshouwang.bluetooth_low_energy
+
+import android.bluetooth.BluetoothGatt
+import android.bluetooth.BluetoothGattCharacteristic
+import android.bluetooth.BluetoothGattDescriptor
+import dev.yanshouwang.bluetooth_low_energy.pigeon.Api
+import dev.yanshouwang.bluetooth_low_energy.proto.gattDescriptor
+import dev.yanshouwang.bluetooth_low_energy.proto.uUID
+import java.util.UUID
+
+object MyGattCharacteristicHostApi : Api.GattCharacteristicHostApi {
+    private const val CLIENT_CHARACTERISTIC_CONFIG = "00002902-0000-1000-8000-00805f9b34fb"
+
+    override fun allocate(id: Long, instanceId: Long) {
+        val list = instances.remove(instanceId) as List<Any>
+        val characteristic = list[1]
+        instances[id] = list
+        identifiers[characteristic] = id
+    }
+
+    override fun free(id: Long) {
+        val list = instances.remove(id) as List<Any>
+        val characteristic = list[1]
+        identifiers.remove(characteristic)
+    }
+
+    override fun discoverDescriptors(id: Long, result: Api.Result<MutableList<ByteArray>>) {
+        val list = instances[id] as List<Any>
+        val gatt = list[0] as BluetoothGatt
+        val characteristic = list[1] as BluetoothGattCharacteristic
+        val descriptorValues = mutableListOf<ByteArray>()
+        for (descriptor in characteristic.descriptors) {
+            val descriptorId = descriptor.hashCode().toLong()
+            instances[descriptorId] = listOf(gatt, descriptor)
+            val descriptorValue = gattDescriptor {
+                this.id = descriptorId
+                this.uuid = uUID {
+                    this.value = descriptor.uuid.toString()
+                }
+            }.toByteArray()
+            descriptorValues.add(descriptorValue)
+        }
+        result.success(descriptorValues)
+    }
+
+    override fun read(id: Long, result: Api.Result<ByteArray>) {
+        val list = instances[id] as List<Any>
+        val gatt = list[0] as BluetoothGatt
+        val characteristic = list[1] as BluetoothGattCharacteristic
+        val succeed = gatt.readCharacteristic(characteristic)
+        if (succeed) {
+            items["${characteristic.hashCode()}/$KEY_READ_RESULT"] = result
+        } else {
+            val error = BluetoothLowEnergyException("GATT read characteristic failed.")
+            result.error(error)
+        }
+    }
+
+    override fun write(id: Long, value: ByteArray, withoutResponse: Boolean, result: Api.Result<Void>) {
+        val list = instances[id] as List<Any>
+        val gatt = list[0] as BluetoothGatt
+        val characteristic = list[1] as BluetoothGattCharacteristic
+        characteristic.writeType = if (withoutResponse) {
+            BluetoothGattCharacteristic.WRITE_TYPE_NO_RESPONSE
+        } else {
+            BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT
+        }
+        characteristic.value = value
+        val succeed = gatt.writeCharacteristic(characteristic)
+        if (succeed) {
+            items["${characteristic.hashCode()}/$KEY_WRITE_RESULT"] = result
+        } else {
+            val error = BluetoothLowEnergyException("GATT write characteristic failed.")
+            result.error(error)
+        }
+    }
+
+    override fun setNotify(id: Long, value: Boolean, result: Api.Result<Void>) {
+        val list = instances[id] as List<Any>
+        val gatt = list[0] as BluetoothGatt
+        val characteristic = list[1] as BluetoothGattCharacteristic
+        val setNotificationSucceed = gatt.setCharacteristicNotification(characteristic, value)
+        if (setNotificationSucceed) {
+            val uuid = UUID.fromString(CLIENT_CHARACTERISTIC_CONFIG)
+            val descriptor = characteristic.getDescriptor(uuid)
+            descriptor.value = if (value) {
+                BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE
+            } else {
+                BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE
+            }
+            val writeSucceed = gatt.writeDescriptor(descriptor)
+            if (writeSucceed) {
+                items["${descriptor.hashCode()}/${KEY_WRITE_RESULT}"] = result
+            } else {
+                val error = BluetoothLowEnergyException("GATT write <client characteristic config> descriptor failed.")
+                result.error(error)
+            }
+        } else {
+            val error = BluetoothLowEnergyException("GATT set characteristic notification failed.")
+            result.error(error)
+        }
+    }
+}

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/MyGattDescriptorHostApi.kt

@@ -0,0 +1,47 @@
+package dev.yanshouwang.bluetooth_low_energy
+
+import android.bluetooth.BluetoothGatt
+import android.bluetooth.BluetoothGattDescriptor
+import dev.yanshouwang.bluetooth_low_energy.pigeon.Api
+
+object MyGattDescriptorHostApi : Api.GattDescriptorHostApi {
+    override fun allocate(id: Long, instanceId: Long) {
+        val list = instances.remove(instanceId) as List<Any>
+        val descriptor = list[1]
+        instances[id] = list
+        identifiers[descriptor] = id
+    }
+
+    override fun free(id: Long) {
+        val list = instances.remove(id) as List<Any>
+        val descriptor = list[1]
+        identifiers.remove(descriptor)
+    }
+
+    override fun read(id: Long, result: Api.Result<ByteArray>) {
+        val list = instances[id] as List<Any>
+        val gatt = list[0] as BluetoothGatt
+        val descriptor = list[1] as BluetoothGattDescriptor
+        val succeed = gatt.readDescriptor(descriptor)
+        if (succeed) {
+            items["${descriptor.hashCode()}/$KEY_READ_RESULT"] = result
+        } else {
+            val error = BluetoothLowEnergyException("GATT read descriptor failed.")
+            result.error(error)
+        }
+    }
+
+    override fun write(id: Long, value: ByteArray, result: Api.Result<Void>) {
+        val list = instances[id] as List<Any>
+        val gatt = list[0] as BluetoothGatt
+        val descriptor = list[1] as BluetoothGattDescriptor
+        descriptor.value = value
+        val succeed = gatt.writeDescriptor(descriptor)
+        if (succeed) {
+            items["${descriptor.hashCode()}/$KEY_WRITE_RESULT"] = result
+        } else {
+            val error = BluetoothLowEnergyException("GATT write descriptor failed.")
+            result.error(error)
+        }
+    }
+}

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/MyGattServiceHostApi.kt

@@ -0,0 +1,47 @@
+package dev.yanshouwang.bluetooth_low_energy
+
+import android.bluetooth.BluetoothGatt
+import android.bluetooth.BluetoothGattCharacteristic
+import android.bluetooth.BluetoothGattService
+import dev.yanshouwang.bluetooth_low_energy.pigeon.Api
+import dev.yanshouwang.bluetooth_low_energy.proto.gattCharacteristic
+import dev.yanshouwang.bluetooth_low_energy.proto.uUID
+
+object MyGattServiceHostApi : Api.GattServiceHostApi {
+    override fun allocate(id: Long, instanceId: Long) {
+        val list = instances.remove(instanceId) as List<Any>
+        val service = list[1]
+        instances[id] = list
+        identifiers[service] = id
+    }
+
+    override fun free(id: Long) {
+        val list = instances.remove(id) as List<Any>
+        val service = list[1]
+        identifiers.remove(service)
+    }
+
+    override fun discoverCharacteristics(id: Long, result: Api.Result<MutableList<ByteArray>>) {
+        val list = instances[id] as List<Any>
+        val gatt = list[0] as BluetoothGatt
+        val service = list[1] as BluetoothGattService
+        val characteristicValues = mutableListOf<ByteArray>()
+        for (characteristic in service.characteristics) {
+            val characteristicId = characteristic.hashCode().toLong()
+            instances[characteristicId] = listOf(gatt, characteristic)
+            val characteristicValue = gattCharacteristic {
+                this.id = characteristicId
+                this.uuid = uUID {
+                    this.value = characteristic.uuid.toString()
+                }
+                this.canRead = characteristic.properties and BluetoothGattCharacteristic.PROPERTY_READ != 0
+                this.canWrite = characteristic.properties and BluetoothGattCharacteristic.PROPERTY_WRITE != 0
+                this.canWriteWithoutResponse =
+                    characteristic.properties and BluetoothGattCharacteristic.PROPERTY_WRITE_NO_RESPONSE != 0
+                this.canNotify = characteristic.properties and BluetoothGattCharacteristic.PROPERTY_NOTIFY != 0
+            }.toByteArray()
+            characteristicValues.add(characteristicValue)
+        }
+        result.success(characteristicValues)
+    }
+}

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/MyPeripheralHostApi.kt

@@ -0,0 +1,34 @@
+package dev.yanshouwang.bluetooth_low_energy
+
+import android.bluetooth.BluetoothGatt
+import dev.yanshouwang.bluetooth_low_energy.pigeon.Api
+
+object MyPeripheralHostApi : Api.PeripheralHostApi {
+    override fun allocate(id: Long, instanceId: Long) {
+        val gatt = instances.remove(instanceId) as BluetoothGatt
+        instances[id] = gatt
+        identifiers[gatt] = id
+    }
+
+    override fun free(id: Long) {
+        val gatt = instances.remove(id) as BluetoothGatt
+        identifiers.remove(gatt)
+    }
+
+    override fun disconnect(id: Long, result: Api.Result<Void>) {
+        val gatt = instances[id] as BluetoothGatt
+        gatt.disconnect()
+        items["${gatt.hashCode()}/$KEY_DISCONNECT_RESULT"] = result
+    }
+
+    override fun discoverServices(id: Long, result: Api.Result<MutableList<ByteArray>>) {
+        val gatt = instances[id] as BluetoothGatt
+        val started = gatt.discoverServices()
+        if (started) {
+            items["${gatt.hashCode()}/$KEY_DISCOVER_SERVICES_RESULT"] = result
+        } else {
+            val error = BluetoothLowEnergyException("Start discover services failed.")
+            result.error(error)
+        }
+    }
+}

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/MyRequestPermissionsResultListener.kt

@@ -0,0 +1,19 @@
+package dev.yanshouwang.bluetooth_low_energy
+
+import android.content.pm.PackageManager
+import dev.yanshouwang.bluetooth_low_energy.pigeon.Api
+import io.flutter.plugin.common.PluginRegistry.RequestPermissionsResultListener
+
+object MyRequestPermissionsResultListener : RequestPermissionsResultListener {
+    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray): Boolean {
+        return when (requestCode) {
+            REQUEST_CODE -> {
+                val result = items.remove(KEY_AUTHORIZE_RESULT) as Api.Result<Boolean>
+                val authorized = grantResults.all { grantResult -> grantResult == PackageManager.PERMISSION_GRANTED }
+                result.success(authorized)
+                true
+            }
+            else -> false
+        }
+    }
+}

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/MyScanCallback.kt

@@ -0,0 +1,81 @@
+package dev.yanshouwang.bluetooth_low_energy
+
+import android.bluetooth.le.ScanCallback
+import android.bluetooth.le.ScanResult
+import android.bluetooth.le.ScanSettings
+import android.os.Build
+import com.google.protobuf.ByteString
+import dev.yanshouwang.bluetooth_low_energy.proto.advertisement
+import dev.yanshouwang.bluetooth_low_energy.proto.serviceData
+import dev.yanshouwang.bluetooth_low_energy.proto.uUID
+
+object MyScanCallback : ScanCallback() {
+    override fun onScanFailed(errorCode: Int) {
+        super.onScanFailed(errorCode)
+        val error = BluetoothLowEnergyException("Start scan failed with code: $errorCode")
+        items[KEY_START_SCAN_ERROR] = error
+    }
+
+    override fun onScanResult(callbackType: Int, result: ScanResult) {
+        super.onScanResult(callbackType, result)
+        val advertisementValue = advertisement {
+            this.uuid = uUID {
+                this.value = result.device.uuidString
+            }
+            this.rssi = result.rssi
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                this.connectable = result.isConnectable
+            }
+            val scanRecord = result.scanRecord
+            if (scanRecord == null) {
+                this.data = ByteString.EMPTY
+            } else {
+                this.data = ByteString.copyFrom(scanRecord.bytes)
+                val deviceName = scanRecord.deviceName
+                if (deviceName != null) {
+                    this.localName = deviceName
+                }
+                val manufacturerSpecificData = scanRecord.rawManufacturerSpecificData
+                if (manufacturerSpecificData != null) {
+                    this.manufacturerSpecificData = ByteString.copyFrom(manufacturerSpecificData)
+                }
+                val serviceDatas = scanRecord.serviceData.map { entry ->
+                    serviceData {
+                        this.uuid = uUID {
+                            this.value = entry.key.toString()
+                        }
+                        this.data = ByteString.copyFrom(entry.value)
+                    }
+                }
+                this.serviceDatas.addAll(serviceDatas)
+                val serviceUUIDs = scanRecord.serviceUuids
+                if (serviceUUIDs != null) {
+                    val uuids = serviceUUIDs.map { uuid ->
+                        uUID {
+                            this.value = uuid.toString()
+                        }
+                    }
+                    this.serviceUuids.addAll(uuids)
+                }
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+                    val uuids = scanRecord.serviceSolicitationUuids.map { uuid ->
+                        uUID {
+                            this.value = uuid.toString()
+                        }
+                    }
+                    this.solicitedServiceUuids.addAll(uuids)
+                }
+                this.txPowerLevel = scanRecord.txPowerLevel
+            }
+        }.toByteArray()
+        centralFlutterApi.notifyAdvertisement(advertisementValue) {}
+    }
+
+    override fun onBatchScanResults(results: MutableList<ScanResult>) {
+        super.onBatchScanResults(results)
+
+        for (result in results) {
+            onScanResult(ScanSettings.CALLBACK_TYPE_ALL_MATCHES, result)
+        }
+    }
+}

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/NativeGATT.kt

@@ -1,5 +0,0 @@
-package dev.yanshouwang.bluetooth_low_energy
-
-import android.bluetooth.BluetoothGatt
-
-class NativeGATT(value: BluetoothGatt, val services: Map<String, NativeGattService>) : NativeValue<BluetoothGatt>(value)

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/NativeGattCharacteristic.kt

@@ -1,5 +0,0 @@
-package dev.yanshouwang.bluetooth_low_energy
-
-import android.bluetooth.BluetoothGattCharacteristic
-
-class NativeGattCharacteristic(value: BluetoothGattCharacteristic, val descriptors: Map<String, NativeGattDescriptor>) : NativeValue<BluetoothGattCharacteristic>(value)

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/NativeGattDescriptor.kt

@@ -1,5 +0,0 @@
-package dev.yanshouwang.bluetooth_low_energy
-
-import android.bluetooth.BluetoothGattDescriptor
-
-class NativeGattDescriptor(value: BluetoothGattDescriptor) : NativeValue<BluetoothGattDescriptor>(value)

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/NativeGattService.kt

@@ -1,5 +0,0 @@
-package dev.yanshouwang.bluetooth_low_energy
-
-import android.bluetooth.BluetoothGattService
-
-class NativeGattService(value: BluetoothGattService, val characteristics: Map<String, NativeGattCharacteristic>) : NativeValue<BluetoothGattService>(value)

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/NativeValue.kt

@@ -1,7 +0,0 @@
-package dev.yanshouwang.bluetooth_low_energy
-
-import java.util.*
-
-open class NativeValue<T>(val value: T) {
-    public val key = UUID.randomUUID().toString()
-}

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/StartDiscoveryArgumentsKt.kt

@@ -1,96 +0,0 @@
-//Generated by the protocol buffer compiler. DO NOT EDIT!
-// source: message.proto
-
-package dev.yanshouwang.bluetooth_low_energy;
-
-@kotlin.jvm.JvmSynthetic
-inline fun startDiscoveryArguments(block: dev.yanshouwang.bluetooth_low_energy.StartDiscoveryArgumentsKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.StartDiscoveryArguments =
-  dev.yanshouwang.bluetooth_low_energy.StartDiscoveryArgumentsKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.StartDiscoveryArguments.newBuilder()).apply { block() }._build()
-object StartDiscoveryArgumentsKt {
-  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-  @com.google.protobuf.kotlin.ProtoDslMarker
-  class Dsl private constructor(
-    @kotlin.jvm.JvmField private val _builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.StartDiscoveryArguments.Builder
-  ) {
-    companion object {
-      @kotlin.jvm.JvmSynthetic
-      @kotlin.PublishedApi
-      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.StartDiscoveryArguments.Builder): Dsl = Dsl(builder)
-    }
-
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.PublishedApi
-    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.StartDiscoveryArguments = _builder.build()
-
-    /**
-     * An uninstantiable, behaviorless type to represent the field in
-     * generics.
-     */
-    @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-    class ServicesProxy private constructor() : com.google.protobuf.kotlin.DslProxy()
-    /**
-     * <code>repeated string services = 1;</code>
-     * @return A list containing the services.
-     */
-    val services: com.google.protobuf.kotlin.DslList<kotlin.String, ServicesProxy>
-      @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
-      get() = com.google.protobuf.kotlin.DslList(
-        _builder.getServicesList()
-      )
-    /**
-     * <code>repeated string services = 1;</code>
-     * @param value The services to add.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("addServices")
-    fun com.google.protobuf.kotlin.DslList<kotlin.String, ServicesProxy>.add(value: kotlin.String) {
-      _builder.addServices(value)
-    }
-    /**
-     * <code>repeated string services = 1;</code>
-     * @param value The services to add.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("plusAssignServices")
-    operator fun com.google.protobuf.kotlin.DslList<kotlin.String, ServicesProxy>.plusAssign(value: kotlin.String) {
-      _builder.addServices(value)
-    }
-    /**
-     * <code>repeated string services = 1;</code>
-     * @param values The services to add.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("addAllServices")
-    fun com.google.protobuf.kotlin.DslList<kotlin.String, ServicesProxy>.addAll(values: kotlin.collections.Iterable<kotlin.String>) {
-      _builder.addAllServices(values)
-    }
-    /**
-     * <code>repeated string services = 1;</code>
-     * @param values The services to add.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("plusAssignAllServices")
-    operator fun com.google.protobuf.kotlin.DslList<kotlin.String, ServicesProxy>.plusAssign(values: kotlin.collections.Iterable<kotlin.String>) {
-      _builder.addAllServices(values)
-    }
-    /**
-     * <code>repeated string services = 1;</code>
-     * @param index The index to set the value at.
-     * @param value The services to set.
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("setServices")
-    operator fun com.google.protobuf.kotlin.DslList<kotlin.String, ServicesProxy>.set(index: kotlin.Int, value: kotlin.String) {
-      _builder.setServices(index, value)
-    }/**
-     * <code>repeated string services = 1;</code>
-     */
-    @kotlin.jvm.JvmSynthetic
-    @kotlin.jvm.JvmName("clearServices")
-    fun com.google.protobuf.kotlin.DslList<kotlin.String, ServicesProxy>.clear() {
-      _builder.clearServices()
-    }}
-}
-@kotlin.jvm.JvmSynthetic
-inline fun dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.StartDiscoveryArguments.copy(block: dev.yanshouwang.bluetooth_low_energy.StartDiscoveryArgumentsKt.Dsl.() -> Unit): dev.yanshouwang.bluetooth_low_energy.MessageOuterClass.StartDiscoveryArguments =
-  dev.yanshouwang.bluetooth_low_energy.StartDiscoveryArgumentsKt.Dsl._create(this.toBuilder()).apply { block() }._build()

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/proto/AdvertisementKt.kt

@@ -0,0 +1,395 @@
+//Generated by the protocol buffer compiler. DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+@kotlin.jvm.JvmName("-initializeadvertisement")
+inline fun advertisement(block: dev.yanshouwang.bluetooth_low_energy.proto.AdvertisementKt.Dsl.() -> kotlin.Unit): dev.yanshouwang.bluetooth_low_energy.proto.Advertisement =
+  dev.yanshouwang.bluetooth_low_energy.proto.AdvertisementKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.proto.Advertisement.newBuilder()).apply { block() }._build()
+object AdvertisementKt {
+  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
+  @com.google.protobuf.kotlin.ProtoDslMarker
+  class Dsl private constructor(
+    private val _builder: dev.yanshouwang.bluetooth_low_energy.proto.Advertisement.Builder
+  ) {
+    companion object {
+      @kotlin.jvm.JvmSynthetic
+      @kotlin.PublishedApi
+      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.proto.Advertisement.Builder): Dsl = Dsl(builder)
+    }
+
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.PublishedApi
+    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.proto.Advertisement = _builder.build()
+
+    /**
+     * <code>.proto.UUID uuid = 1;</code>
+     */
+    var uuid: dev.yanshouwang.bluetooth_low_energy.proto.UUID
+      @JvmName("getUuid")
+      get() = _builder.getUuid()
+      @JvmName("setUuid")
+      set(value) {
+        _builder.setUuid(value)
+      }
+    /**
+     * <code>.proto.UUID uuid = 1;</code>
+     */
+    fun clearUuid() {
+      _builder.clearUuid()
+    }
+    /**
+     * <code>.proto.UUID uuid = 1;</code>
+     * @return Whether the uuid field is set.
+     */
+    fun hasUuid(): kotlin.Boolean {
+      return _builder.hasUuid()
+    }
+
+    /**
+     * <code>int32 rssi = 2;</code>
+     */
+    var rssi: kotlin.Int
+      @JvmName("getRssi")
+      get() = _builder.getRssi()
+      @JvmName("setRssi")
+      set(value) {
+        _builder.setRssi(value)
+      }
+    /**
+     * <code>int32 rssi = 2;</code>
+     */
+    fun clearRssi() {
+      _builder.clearRssi()
+    }
+
+    /**
+     * <code>optional bool connectable = 3;</code>
+     */
+    var connectable: kotlin.Boolean
+      @JvmName("getConnectable")
+      get() = _builder.getConnectable()
+      @JvmName("setConnectable")
+      set(value) {
+        _builder.setConnectable(value)
+      }
+    /**
+     * <code>optional bool connectable = 3;</code>
+     */
+    fun clearConnectable() {
+      _builder.clearConnectable()
+    }
+    /**
+     * <code>optional bool connectable = 3;</code>
+     * @return Whether the connectable field is set.
+     */
+    fun hasConnectable(): kotlin.Boolean {
+      return _builder.hasConnectable()
+    }
+
+    /**
+     * <code>bytes data = 4;</code>
+     */
+    var data: com.google.protobuf.ByteString
+      @JvmName("getData")
+      get() = _builder.getData()
+      @JvmName("setData")
+      set(value) {
+        _builder.setData(value)
+      }
+    /**
+     * <code>bytes data = 4;</code>
+     */
+    fun clearData() {
+      _builder.clearData()
+    }
+
+    /**
+     * <code>optional string local_name = 5;</code>
+     */
+    var localName: kotlin.String
+      @JvmName("getLocalName")
+      get() = _builder.getLocalName()
+      @JvmName("setLocalName")
+      set(value) {
+        _builder.setLocalName(value)
+      }
+    /**
+     * <code>optional string local_name = 5;</code>
+     */
+    fun clearLocalName() {
+      _builder.clearLocalName()
+    }
+    /**
+     * <code>optional string local_name = 5;</code>
+     * @return Whether the localName field is set.
+     */
+    fun hasLocalName(): kotlin.Boolean {
+      return _builder.hasLocalName()
+    }
+
+    /**
+     * <code>bytes manufacturer_specific_data = 6;</code>
+     */
+    var manufacturerSpecificData: com.google.protobuf.ByteString
+      @JvmName("getManufacturerSpecificData")
+      get() = _builder.getManufacturerSpecificData()
+      @JvmName("setManufacturerSpecificData")
+      set(value) {
+        _builder.setManufacturerSpecificData(value)
+      }
+    /**
+     * <code>bytes manufacturer_specific_data = 6;</code>
+     */
+    fun clearManufacturerSpecificData() {
+      _builder.clearManufacturerSpecificData()
+    }
+
+    /**
+     * An uninstantiable, behaviorless type to represent the field in
+     * generics.
+     */
+    @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
+    class ServiceDatasProxy private constructor() : com.google.protobuf.kotlin.DslProxy()
+    /**
+     * <code>repeated .proto.ServiceData service_datas = 7;</code>
+     */
+     val serviceDatas: com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.ServiceData, ServiceDatasProxy>
+      @kotlin.jvm.JvmSynthetic
+      get() = com.google.protobuf.kotlin.DslList(
+        _builder.getServiceDatasList()
+      )
+    /**
+     * <code>repeated .proto.ServiceData service_datas = 7;</code>
+     * @param value The serviceDatas to add.
+     */
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.jvm.JvmName("addServiceDatas")
+    fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.ServiceData, ServiceDatasProxy>.add(value: dev.yanshouwang.bluetooth_low_energy.proto.ServiceData) {
+      _builder.addServiceDatas(value)
+    }
+    /**
+     * <code>repeated .proto.ServiceData service_datas = 7;</code>
+     * @param value The serviceDatas to add.
+     */
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.jvm.JvmName("plusAssignServiceDatas")
+    @Suppress("NOTHING_TO_INLINE")
+    inline operator fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.ServiceData, ServiceDatasProxy>.plusAssign(value: dev.yanshouwang.bluetooth_low_energy.proto.ServiceData) {
+      add(value)
+    }
+    /**
+     * <code>repeated .proto.ServiceData service_datas = 7;</code>
+     * @param values The serviceDatas to add.
+     */
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.jvm.JvmName("addAllServiceDatas")
+    fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.ServiceData, ServiceDatasProxy>.addAll(values: kotlin.collections.Iterable<dev.yanshouwang.bluetooth_low_energy.proto.ServiceData>) {
+      _builder.addAllServiceDatas(values)
+    }
+    /**
+     * <code>repeated .proto.ServiceData service_datas = 7;</code>
+     * @param values The serviceDatas to add.
+     */
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.jvm.JvmName("plusAssignAllServiceDatas")
+    @Suppress("NOTHING_TO_INLINE")
+    inline operator fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.ServiceData, ServiceDatasProxy>.plusAssign(values: kotlin.collections.Iterable<dev.yanshouwang.bluetooth_low_energy.proto.ServiceData>) {
+      addAll(values)
+    }
+    /**
+     * <code>repeated .proto.ServiceData service_datas = 7;</code>
+     * @param index The index to set the value at.
+     * @param value The serviceDatas to set.
+     */
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.jvm.JvmName("setServiceDatas")
+    operator fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.ServiceData, ServiceDatasProxy>.set(index: kotlin.Int, value: dev.yanshouwang.bluetooth_low_energy.proto.ServiceData) {
+      _builder.setServiceDatas(index, value)
+    }
+    /**
+     * <code>repeated .proto.ServiceData service_datas = 7;</code>
+     */
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.jvm.JvmName("clearServiceDatas")
+    fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.ServiceData, ServiceDatasProxy>.clear() {
+      _builder.clearServiceDatas()
+    }
+
+
+    /**
+     * An uninstantiable, behaviorless type to represent the field in
+     * generics.
+     */
+    @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
+    class ServiceUuidsProxy private constructor() : com.google.protobuf.kotlin.DslProxy()
+    /**
+     * <code>repeated .proto.UUID service_uuids = 8;</code>
+     */
+     val serviceUuids: com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.UUID, ServiceUuidsProxy>
+      @kotlin.jvm.JvmSynthetic
+      get() = com.google.protobuf.kotlin.DslList(
+        _builder.getServiceUuidsList()
+      )
+    /**
+     * <code>repeated .proto.UUID service_uuids = 8;</code>
+     * @param value The serviceUuids to add.
+     */
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.jvm.JvmName("addServiceUuids")
+    fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.UUID, ServiceUuidsProxy>.add(value: dev.yanshouwang.bluetooth_low_energy.proto.UUID) {
+      _builder.addServiceUuids(value)
+    }
+    /**
+     * <code>repeated .proto.UUID service_uuids = 8;</code>
+     * @param value The serviceUuids to add.
+     */
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.jvm.JvmName("plusAssignServiceUuids")
+    @Suppress("NOTHING_TO_INLINE")
+    inline operator fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.UUID, ServiceUuidsProxy>.plusAssign(value: dev.yanshouwang.bluetooth_low_energy.proto.UUID) {
+      add(value)
+    }
+    /**
+     * <code>repeated .proto.UUID service_uuids = 8;</code>
+     * @param values The serviceUuids to add.
+     */
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.jvm.JvmName("addAllServiceUuids")
+    fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.UUID, ServiceUuidsProxy>.addAll(values: kotlin.collections.Iterable<dev.yanshouwang.bluetooth_low_energy.proto.UUID>) {
+      _builder.addAllServiceUuids(values)
+    }
+    /**
+     * <code>repeated .proto.UUID service_uuids = 8;</code>
+     * @param values The serviceUuids to add.
+     */
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.jvm.JvmName("plusAssignAllServiceUuids")
+    @Suppress("NOTHING_TO_INLINE")
+    inline operator fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.UUID, ServiceUuidsProxy>.plusAssign(values: kotlin.collections.Iterable<dev.yanshouwang.bluetooth_low_energy.proto.UUID>) {
+      addAll(values)
+    }
+    /**
+     * <code>repeated .proto.UUID service_uuids = 8;</code>
+     * @param index The index to set the value at.
+     * @param value The serviceUuids to set.
+     */
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.jvm.JvmName("setServiceUuids")
+    operator fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.UUID, ServiceUuidsProxy>.set(index: kotlin.Int, value: dev.yanshouwang.bluetooth_low_energy.proto.UUID) {
+      _builder.setServiceUuids(index, value)
+    }
+    /**
+     * <code>repeated .proto.UUID service_uuids = 8;</code>
+     */
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.jvm.JvmName("clearServiceUuids")
+    fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.UUID, ServiceUuidsProxy>.clear() {
+      _builder.clearServiceUuids()
+    }
+
+
+    /**
+     * An uninstantiable, behaviorless type to represent the field in
+     * generics.
+     */
+    @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
+    class SolicitedServiceUuidsProxy private constructor() : com.google.protobuf.kotlin.DslProxy()
+    /**
+     * <code>repeated .proto.UUID solicited_service_uuids = 9;</code>
+     */
+     val solicitedServiceUuids: com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.UUID, SolicitedServiceUuidsProxy>
+      @kotlin.jvm.JvmSynthetic
+      get() = com.google.protobuf.kotlin.DslList(
+        _builder.getSolicitedServiceUuidsList()
+      )
+    /**
+     * <code>repeated .proto.UUID solicited_service_uuids = 9;</code>
+     * @param value The solicitedServiceUuids to add.
+     */
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.jvm.JvmName("addSolicitedServiceUuids")
+    fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.UUID, SolicitedServiceUuidsProxy>.add(value: dev.yanshouwang.bluetooth_low_energy.proto.UUID) {
+      _builder.addSolicitedServiceUuids(value)
+    }
+    /**
+     * <code>repeated .proto.UUID solicited_service_uuids = 9;</code>
+     * @param value The solicitedServiceUuids to add.
+     */
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.jvm.JvmName("plusAssignSolicitedServiceUuids")
+    @Suppress("NOTHING_TO_INLINE")
+    inline operator fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.UUID, SolicitedServiceUuidsProxy>.plusAssign(value: dev.yanshouwang.bluetooth_low_energy.proto.UUID) {
+      add(value)
+    }
+    /**
+     * <code>repeated .proto.UUID solicited_service_uuids = 9;</code>
+     * @param values The solicitedServiceUuids to add.
+     */
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.jvm.JvmName("addAllSolicitedServiceUuids")
+    fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.UUID, SolicitedServiceUuidsProxy>.addAll(values: kotlin.collections.Iterable<dev.yanshouwang.bluetooth_low_energy.proto.UUID>) {
+      _builder.addAllSolicitedServiceUuids(values)
+    }
+    /**
+     * <code>repeated .proto.UUID solicited_service_uuids = 9;</code>
+     * @param values The solicitedServiceUuids to add.
+     */
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.jvm.JvmName("plusAssignAllSolicitedServiceUuids")
+    @Suppress("NOTHING_TO_INLINE")
+    inline operator fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.UUID, SolicitedServiceUuidsProxy>.plusAssign(values: kotlin.collections.Iterable<dev.yanshouwang.bluetooth_low_energy.proto.UUID>) {
+      addAll(values)
+    }
+    /**
+     * <code>repeated .proto.UUID solicited_service_uuids = 9;</code>
+     * @param index The index to set the value at.
+     * @param value The solicitedServiceUuids to set.
+     */
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.jvm.JvmName("setSolicitedServiceUuids")
+    operator fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.UUID, SolicitedServiceUuidsProxy>.set(index: kotlin.Int, value: dev.yanshouwang.bluetooth_low_energy.proto.UUID) {
+      _builder.setSolicitedServiceUuids(index, value)
+    }
+    /**
+     * <code>repeated .proto.UUID solicited_service_uuids = 9;</code>
+     */
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.jvm.JvmName("clearSolicitedServiceUuids")
+    fun com.google.protobuf.kotlin.DslList<dev.yanshouwang.bluetooth_low_energy.proto.UUID, SolicitedServiceUuidsProxy>.clear() {
+      _builder.clearSolicitedServiceUuids()
+    }
+
+
+    /**
+     * <code>optional int32 tx_power_level = 10;</code>
+     */
+    var txPowerLevel: kotlin.Int
+      @JvmName("getTxPowerLevel")
+      get() = _builder.getTxPowerLevel()
+      @JvmName("setTxPowerLevel")
+      set(value) {
+        _builder.setTxPowerLevel(value)
+      }
+    /**
+     * <code>optional int32 tx_power_level = 10;</code>
+     */
+    fun clearTxPowerLevel() {
+      _builder.clearTxPowerLevel()
+    }
+    /**
+     * <code>optional int32 tx_power_level = 10;</code>
+     * @return Whether the txPowerLevel field is set.
+     */
+    fun hasTxPowerLevel(): kotlin.Boolean {
+      return _builder.hasTxPowerLevel()
+    }
+  }
+}
+@kotlin.jvm.JvmSynthetic
+inline fun dev.yanshouwang.bluetooth_low_energy.proto.Advertisement.copy(block: dev.yanshouwang.bluetooth_low_energy.proto.AdvertisementKt.Dsl.() -> kotlin.Unit): dev.yanshouwang.bluetooth_low_energy.proto.Advertisement =
+  dev.yanshouwang.bluetooth_low_energy.proto.AdvertisementKt.Dsl._create(this.toBuilder()).apply { block() }._build()
+
+val dev.yanshouwang.bluetooth_low_energy.proto.AdvertisementOrBuilder.uuidOrNull: dev.yanshouwang.bluetooth_low_energy.proto.UUID?
+  get() = if (hasUuid()) getUuid() else null
+

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/proto/BluetoothLowEnergyExceptionKt.kt

@@ -0,0 +1,46 @@
+//Generated by the protocol buffer compiler. DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+@kotlin.jvm.JvmName("-initializebluetoothLowEnergyException")
+inline fun bluetoothLowEnergyException(block: dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyExceptionKt.Dsl.() -> kotlin.Unit): dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException =
+  dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyExceptionKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException.newBuilder()).apply { block() }._build()
+object BluetoothLowEnergyExceptionKt {
+  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
+  @com.google.protobuf.kotlin.ProtoDslMarker
+  class Dsl private constructor(
+    private val _builder: dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException.Builder
+  ) {
+    companion object {
+      @kotlin.jvm.JvmSynthetic
+      @kotlin.PublishedApi
+      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException.Builder): Dsl = Dsl(builder)
+    }
+
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.PublishedApi
+    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException = _builder.build()
+
+    /**
+     * <code>string message = 1;</code>
+     */
+    var message: kotlin.String
+      @JvmName("getMessage")
+      get() = _builder.getMessage()
+      @JvmName("setMessage")
+      set(value) {
+        _builder.setMessage(value)
+      }
+    /**
+     * <code>string message = 1;</code>
+     */
+    fun clearMessage() {
+      _builder.clearMessage()
+    }
+  }
+}
+@kotlin.jvm.JvmSynthetic
+inline fun dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException.copy(block: dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyExceptionKt.Dsl.() -> kotlin.Unit): dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyException =
+  dev.yanshouwang.bluetooth_low_energy.proto.BluetoothLowEnergyExceptionKt.Dsl._create(this.toBuilder()).apply { block() }._build()
+

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/proto/GattCharacteristicKt.kt

@@ -0,0 +1,141 @@
+//Generated by the protocol buffer compiler. DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+@kotlin.jvm.JvmName("-initializegattCharacteristic")
+inline fun gattCharacteristic(block: dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristicKt.Dsl.() -> kotlin.Unit): dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristic =
+  dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristicKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristic.newBuilder()).apply { block() }._build()
+object GattCharacteristicKt {
+  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
+  @com.google.protobuf.kotlin.ProtoDslMarker
+  class Dsl private constructor(
+    private val _builder: dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristic.Builder
+  ) {
+    companion object {
+      @kotlin.jvm.JvmSynthetic
+      @kotlin.PublishedApi
+      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristic.Builder): Dsl = Dsl(builder)
+    }
+
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.PublishedApi
+    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristic = _builder.build()
+
+    /**
+     * <code>int64 id = 1;</code>
+     */
+    var id: kotlin.Long
+      @JvmName("getId")
+      get() = _builder.getId()
+      @JvmName("setId")
+      set(value) {
+        _builder.setId(value)
+      }
+    /**
+     * <code>int64 id = 1;</code>
+     */
+    fun clearId() {
+      _builder.clearId()
+    }
+
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    var uuid: dev.yanshouwang.bluetooth_low_energy.proto.UUID
+      @JvmName("getUuid")
+      get() = _builder.getUuid()
+      @JvmName("setUuid")
+      set(value) {
+        _builder.setUuid(value)
+      }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    fun clearUuid() {
+      _builder.clearUuid()
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     * @return Whether the uuid field is set.
+     */
+    fun hasUuid(): kotlin.Boolean {
+      return _builder.hasUuid()
+    }
+
+    /**
+     * <code>bool can_read = 3;</code>
+     */
+    var canRead: kotlin.Boolean
+      @JvmName("getCanRead")
+      get() = _builder.getCanRead()
+      @JvmName("setCanRead")
+      set(value) {
+        _builder.setCanRead(value)
+      }
+    /**
+     * <code>bool can_read = 3;</code>
+     */
+    fun clearCanRead() {
+      _builder.clearCanRead()
+    }
+
+    /**
+     * <code>bool can_write = 4;</code>
+     */
+    var canWrite: kotlin.Boolean
+      @JvmName("getCanWrite")
+      get() = _builder.getCanWrite()
+      @JvmName("setCanWrite")
+      set(value) {
+        _builder.setCanWrite(value)
+      }
+    /**
+     * <code>bool can_write = 4;</code>
+     */
+    fun clearCanWrite() {
+      _builder.clearCanWrite()
+    }
+
+    /**
+     * <code>bool can_write_without_response = 5;</code>
+     */
+    var canWriteWithoutResponse: kotlin.Boolean
+      @JvmName("getCanWriteWithoutResponse")
+      get() = _builder.getCanWriteWithoutResponse()
+      @JvmName("setCanWriteWithoutResponse")
+      set(value) {
+        _builder.setCanWriteWithoutResponse(value)
+      }
+    /**
+     * <code>bool can_write_without_response = 5;</code>
+     */
+    fun clearCanWriteWithoutResponse() {
+      _builder.clearCanWriteWithoutResponse()
+    }
+
+    /**
+     * <code>bool can_notify = 6;</code>
+     */
+    var canNotify: kotlin.Boolean
+      @JvmName("getCanNotify")
+      get() = _builder.getCanNotify()
+      @JvmName("setCanNotify")
+      set(value) {
+        _builder.setCanNotify(value)
+      }
+    /**
+     * <code>bool can_notify = 6;</code>
+     */
+    fun clearCanNotify() {
+      _builder.clearCanNotify()
+    }
+  }
+}
+@kotlin.jvm.JvmSynthetic
+inline fun dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristic.copy(block: dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristicKt.Dsl.() -> kotlin.Unit): dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristic =
+  dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristicKt.Dsl._create(this.toBuilder()).apply { block() }._build()
+
+val dev.yanshouwang.bluetooth_low_energy.proto.GattCharacteristicOrBuilder.uuidOrNull: dev.yanshouwang.bluetooth_low_energy.proto.UUID?
+  get() = if (hasUuid()) getUuid() else null
+

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/proto/GattDescriptorKt.kt

@@ -0,0 +1,73 @@
+//Generated by the protocol buffer compiler. DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+@kotlin.jvm.JvmName("-initializegattDescriptor")
+inline fun gattDescriptor(block: dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptorKt.Dsl.() -> kotlin.Unit): dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor =
+  dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptorKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor.newBuilder()).apply { block() }._build()
+object GattDescriptorKt {
+  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
+  @com.google.protobuf.kotlin.ProtoDslMarker
+  class Dsl private constructor(
+    private val _builder: dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor.Builder
+  ) {
+    companion object {
+      @kotlin.jvm.JvmSynthetic
+      @kotlin.PublishedApi
+      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor.Builder): Dsl = Dsl(builder)
+    }
+
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.PublishedApi
+    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor = _builder.build()
+
+    /**
+     * <code>int64 id = 1;</code>
+     */
+    var id: kotlin.Long
+      @JvmName("getId")
+      get() = _builder.getId()
+      @JvmName("setId")
+      set(value) {
+        _builder.setId(value)
+      }
+    /**
+     * <code>int64 id = 1;</code>
+     */
+    fun clearId() {
+      _builder.clearId()
+    }
+
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    var uuid: dev.yanshouwang.bluetooth_low_energy.proto.UUID
+      @JvmName("getUuid")
+      get() = _builder.getUuid()
+      @JvmName("setUuid")
+      set(value) {
+        _builder.setUuid(value)
+      }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    fun clearUuid() {
+      _builder.clearUuid()
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     * @return Whether the uuid field is set.
+     */
+    fun hasUuid(): kotlin.Boolean {
+      return _builder.hasUuid()
+    }
+  }
+}
+@kotlin.jvm.JvmSynthetic
+inline fun dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor.copy(block: dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptorKt.Dsl.() -> kotlin.Unit): dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptor =
+  dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptorKt.Dsl._create(this.toBuilder()).apply { block() }._build()
+
+val dev.yanshouwang.bluetooth_low_energy.proto.GattDescriptorOrBuilder.uuidOrNull: dev.yanshouwang.bluetooth_low_energy.proto.UUID?
+  get() = if (hasUuid()) getUuid() else null
+

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/proto/GattServiceKt.kt

@@ -0,0 +1,73 @@
+//Generated by the protocol buffer compiler. DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+@kotlin.jvm.JvmName("-initializegattService")
+inline fun gattService(block: dev.yanshouwang.bluetooth_low_energy.proto.GattServiceKt.Dsl.() -> kotlin.Unit): dev.yanshouwang.bluetooth_low_energy.proto.GattService =
+  dev.yanshouwang.bluetooth_low_energy.proto.GattServiceKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.proto.GattService.newBuilder()).apply { block() }._build()
+object GattServiceKt {
+  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
+  @com.google.protobuf.kotlin.ProtoDslMarker
+  class Dsl private constructor(
+    private val _builder: dev.yanshouwang.bluetooth_low_energy.proto.GattService.Builder
+  ) {
+    companion object {
+      @kotlin.jvm.JvmSynthetic
+      @kotlin.PublishedApi
+      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.proto.GattService.Builder): Dsl = Dsl(builder)
+    }
+
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.PublishedApi
+    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.proto.GattService = _builder.build()
+
+    /**
+     * <code>int64 id = 1;</code>
+     */
+    var id: kotlin.Long
+      @JvmName("getId")
+      get() = _builder.getId()
+      @JvmName("setId")
+      set(value) {
+        _builder.setId(value)
+      }
+    /**
+     * <code>int64 id = 1;</code>
+     */
+    fun clearId() {
+      _builder.clearId()
+    }
+
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    var uuid: dev.yanshouwang.bluetooth_low_energy.proto.UUID
+      @JvmName("getUuid")
+      get() = _builder.getUuid()
+      @JvmName("setUuid")
+      set(value) {
+        _builder.setUuid(value)
+      }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     */
+    fun clearUuid() {
+      _builder.clearUuid()
+    }
+    /**
+     * <code>.proto.UUID uuid = 2;</code>
+     * @return Whether the uuid field is set.
+     */
+    fun hasUuid(): kotlin.Boolean {
+      return _builder.hasUuid()
+    }
+  }
+}
+@kotlin.jvm.JvmSynthetic
+inline fun dev.yanshouwang.bluetooth_low_energy.proto.GattService.copy(block: dev.yanshouwang.bluetooth_low_energy.proto.GattServiceKt.Dsl.() -> kotlin.Unit): dev.yanshouwang.bluetooth_low_energy.proto.GattService =
+  dev.yanshouwang.bluetooth_low_energy.proto.GattServiceKt.Dsl._create(this.toBuilder()).apply { block() }._build()
+
+val dev.yanshouwang.bluetooth_low_energy.proto.GattServiceOrBuilder.uuidOrNull: dev.yanshouwang.bluetooth_low_energy.proto.UUID?
+  get() = if (hasUuid()) getUuid() else null
+

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/proto/PeripheralKt.kt

@@ -0,0 +1,63 @@
+//Generated by the protocol buffer compiler. DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+@kotlin.jvm.JvmName("-initializeperipheral")
+inline fun peripheral(block: dev.yanshouwang.bluetooth_low_energy.proto.PeripheralKt.Dsl.() -> kotlin.Unit): dev.yanshouwang.bluetooth_low_energy.proto.Peripheral =
+  dev.yanshouwang.bluetooth_low_energy.proto.PeripheralKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.proto.Peripheral.newBuilder()).apply { block() }._build()
+object PeripheralKt {
+  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
+  @com.google.protobuf.kotlin.ProtoDslMarker
+  class Dsl private constructor(
+    private val _builder: dev.yanshouwang.bluetooth_low_energy.proto.Peripheral.Builder
+  ) {
+    companion object {
+      @kotlin.jvm.JvmSynthetic
+      @kotlin.PublishedApi
+      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.proto.Peripheral.Builder): Dsl = Dsl(builder)
+    }
+
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.PublishedApi
+    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.proto.Peripheral = _builder.build()
+
+    /**
+     * <code>int64 id = 1;</code>
+     */
+    var id: kotlin.Long
+      @JvmName("getId")
+      get() = _builder.getId()
+      @JvmName("setId")
+      set(value) {
+        _builder.setId(value)
+      }
+    /**
+     * <code>int64 id = 1;</code>
+     */
+    fun clearId() {
+      _builder.clearId()
+    }
+
+    /**
+     * <code>int32 maximum_write_length = 2;</code>
+     */
+    var maximumWriteLength: kotlin.Int
+      @JvmName("getMaximumWriteLength")
+      get() = _builder.getMaximumWriteLength()
+      @JvmName("setMaximumWriteLength")
+      set(value) {
+        _builder.setMaximumWriteLength(value)
+      }
+    /**
+     * <code>int32 maximum_write_length = 2;</code>
+     */
+    fun clearMaximumWriteLength() {
+      _builder.clearMaximumWriteLength()
+    }
+  }
+}
+@kotlin.jvm.JvmSynthetic
+inline fun dev.yanshouwang.bluetooth_low_energy.proto.Peripheral.copy(block: dev.yanshouwang.bluetooth_low_energy.proto.PeripheralKt.Dsl.() -> kotlin.Unit): dev.yanshouwang.bluetooth_low_energy.proto.Peripheral =
+  dev.yanshouwang.bluetooth_low_energy.proto.PeripheralKt.Dsl._create(this.toBuilder()).apply { block() }._build()
+

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/proto/ServiceDataKt.kt

@@ -0,0 +1,73 @@
+//Generated by the protocol buffer compiler. DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+@kotlin.jvm.JvmName("-initializeserviceData")
+inline fun serviceData(block: dev.yanshouwang.bluetooth_low_energy.proto.ServiceDataKt.Dsl.() -> kotlin.Unit): dev.yanshouwang.bluetooth_low_energy.proto.ServiceData =
+  dev.yanshouwang.bluetooth_low_energy.proto.ServiceDataKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.proto.ServiceData.newBuilder()).apply { block() }._build()
+object ServiceDataKt {
+  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
+  @com.google.protobuf.kotlin.ProtoDslMarker
+  class Dsl private constructor(
+    private val _builder: dev.yanshouwang.bluetooth_low_energy.proto.ServiceData.Builder
+  ) {
+    companion object {
+      @kotlin.jvm.JvmSynthetic
+      @kotlin.PublishedApi
+      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.proto.ServiceData.Builder): Dsl = Dsl(builder)
+    }
+
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.PublishedApi
+    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.proto.ServiceData = _builder.build()
+
+    /**
+     * <code>.proto.UUID uuid = 1;</code>
+     */
+    var uuid: dev.yanshouwang.bluetooth_low_energy.proto.UUID
+      @JvmName("getUuid")
+      get() = _builder.getUuid()
+      @JvmName("setUuid")
+      set(value) {
+        _builder.setUuid(value)
+      }
+    /**
+     * <code>.proto.UUID uuid = 1;</code>
+     */
+    fun clearUuid() {
+      _builder.clearUuid()
+    }
+    /**
+     * <code>.proto.UUID uuid = 1;</code>
+     * @return Whether the uuid field is set.
+     */
+    fun hasUuid(): kotlin.Boolean {
+      return _builder.hasUuid()
+    }
+
+    /**
+     * <code>bytes data = 2;</code>
+     */
+    var data: com.google.protobuf.ByteString
+      @JvmName("getData")
+      get() = _builder.getData()
+      @JvmName("setData")
+      set(value) {
+        _builder.setData(value)
+      }
+    /**
+     * <code>bytes data = 2;</code>
+     */
+    fun clearData() {
+      _builder.clearData()
+    }
+  }
+}
+@kotlin.jvm.JvmSynthetic
+inline fun dev.yanshouwang.bluetooth_low_energy.proto.ServiceData.copy(block: dev.yanshouwang.bluetooth_low_energy.proto.ServiceDataKt.Dsl.() -> kotlin.Unit): dev.yanshouwang.bluetooth_low_energy.proto.ServiceData =
+  dev.yanshouwang.bluetooth_low_energy.proto.ServiceDataKt.Dsl._create(this.toBuilder()).apply { block() }._build()
+
+val dev.yanshouwang.bluetooth_low_energy.proto.ServiceDataOrBuilder.uuidOrNull: dev.yanshouwang.bluetooth_low_energy.proto.UUID?
+  get() = if (hasUuid()) getUuid() else null
+

android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy/proto/UUIDKt.kt

@@ -0,0 +1,46 @@
+//Generated by the protocol buffer compiler. DO NOT EDIT!
+// source: proto/messages.proto
+
+package dev.yanshouwang.bluetooth_low_energy.proto;
+
+@kotlin.jvm.JvmName("-initializeuUID")
+inline fun uUID(block: dev.yanshouwang.bluetooth_low_energy.proto.UUIDKt.Dsl.() -> kotlin.Unit): dev.yanshouwang.bluetooth_low_energy.proto.UUID =
+  dev.yanshouwang.bluetooth_low_energy.proto.UUIDKt.Dsl._create(dev.yanshouwang.bluetooth_low_energy.proto.UUID.newBuilder()).apply { block() }._build()
+object UUIDKt {
+  @kotlin.OptIn(com.google.protobuf.kotlin.OnlyForUseByGeneratedProtoCode::class)
+  @com.google.protobuf.kotlin.ProtoDslMarker
+  class Dsl private constructor(
+    private val _builder: dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder
+  ) {
+    companion object {
+      @kotlin.jvm.JvmSynthetic
+      @kotlin.PublishedApi
+      internal fun _create(builder: dev.yanshouwang.bluetooth_low_energy.proto.UUID.Builder): Dsl = Dsl(builder)
+    }
+
+    @kotlin.jvm.JvmSynthetic
+    @kotlin.PublishedApi
+    internal fun _build(): dev.yanshouwang.bluetooth_low_energy.proto.UUID = _builder.build()
+
+    /**
+     * <code>string value = 1;</code>
+     */
+    var value: kotlin.String
+      @JvmName("getValue")
+      get() = _builder.getValue()
+      @JvmName("setValue")
+      set(value) {
+        _builder.setValue(value)
+      }
+    /**
+     * <code>string value = 1;</code>
+     */
+    fun clearValue() {
+      _builder.clearValue()
+    }
+  }
+}
+@kotlin.jvm.JvmSynthetic
+inline fun dev.yanshouwang.bluetooth_low_energy.proto.UUID.copy(block: dev.yanshouwang.bluetooth_low_energy.proto.UUIDKt.Dsl.() -> kotlin.Unit): dev.yanshouwang.bluetooth_low_energy.proto.UUID =
+  dev.yanshouwang.bluetooth_low_energy.proto.UUIDKt.Dsl._create(this.toBuilder()).apply { block() }._build()
+

bluetooth_low_energy.iml

@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="JAVA_MODULE" version="4">
-  <component name="NewModuleRootManager" inherit-compiler-output="true">
-    <exclude-output />
-    <content url="file://$MODULE_DIR$">
-      <sourceFolder url="file://$MODULE_DIR$/lib" isTestSource="false" />
-      <excludeFolder url="file://$MODULE_DIR$/.dart_tool" />
-      <excludeFolder url="file://$MODULE_DIR$/.idea" />
-      <excludeFolder url="file://$MODULE_DIR$/.pub" />
-      <excludeFolder url="file://$MODULE_DIR$/build" />
-      <excludeFolder url="file://$MODULE_DIR$/example/.pub" />
-      <excludeFolder url="file://$MODULE_DIR$/example/build" />
-    </content>
-    <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" name="Dart Packages" level="project" />
-    <orderEntry type="library" name="Dart SDK" level="project" />
-    <orderEntry type="library" name="Flutter Plugins" level="project" />
-  </component>
-</module>

example/.gitignore

@@ -8,6 +8,7 @@
 .buildlog/
 .history
 .svn/
+migrate_working_dir/
 
 # IntelliJ related
 *.iml

example/.metadata

@@ -1,10 +0,0 @@
-# This file tracks properties of this Flutter project.
-# Used by Flutter tool to assess capabilities and perform upgrades etc.
-#
-# This file should be version controlled and should not be manually edited.
-
-version:
-  revision: 02c026b03cd31dd3f867e5faeb7e104cce174c5f
-  channel: stable
-
-project_type: app

example/README.md

@@ -8,9 +8,9 @@ This project is a starting point for a Flutter application.
 
 A few resources to get you started if this is your first Flutter project:
 
-- [Lab: Write your first Flutter app](https://flutter.dev/docs/get-started/codelab)
-- [Cookbook: Useful Flutter samples](https://flutter.dev/docs/cookbook)
+- [Lab: Write your first Flutter app](https://docs.flutter.dev/get-started/codelab)
+- [Cookbook: Useful Flutter samples](https://docs.flutter.dev/cookbook)
 
-For help getting started with Flutter, view our
-[online documentation](https://flutter.dev/docs), which offers tutorials,
+For help getting started with Flutter development, view the
+[online documentation](https://docs.flutter.dev/), which offers tutorials,
 samples, guidance on mobile development, and a full API reference.

example/analysis_options.yaml

@@ -0,0 +1,29 @@
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
+
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:flutter_lints/flutter.yaml
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at
+  # https://dart-lang.github.io/linter/lints/index.html.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options

example/android/.gitignore

@@ -9,3 +9,5 @@ GeneratedPluginRegistrant.java
 # Remember to never publicly share your keystore.
 # See https://flutter.dev/docs/deployment/android#reference-the-keystore-from-the-app
 key.properties
+**/*.keystore
+**/*.jks

example/android/app/build.gradle

@@ -1,8 +1,7 @@
 def localProperties = new Properties()
 def localPropertiesFile = rootProject.file('local.properties')
 if (localPropertiesFile.exists()) {
-    localPropertiesFile.withReader('UTF-8') { reader ->
-        localProperties.load(reader)
+    localPropertiesFile.withReader('UTF-8') { reader -> localProperties.load(reader)
     }
 }
 
@@ -26,16 +25,29 @@ apply plugin: 'kotlin-android'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 30
+    compileSdkVersion flutter.compileSdkVersion
+    ndkVersion flutter.ndkVersion
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }
 
     defaultConfig {
+        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "dev.yanshouwang.bluetooth_low_energy_example"
+        // You can update the following values to match your application needs.
+        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
         minSdkVersion 21
-        targetSdkVersion 30
+        targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }

example/android/app/src/debug/AndroidManifest.xml

@@ -1,6 +1,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="dev.yanshouwang.bluetooth_low_energy_example">
-    <!-- Flutter needs it to communicate with the running application
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
          to allow setting breakpoints, to provide hot reload, etc.
     -->
     <uses-permission android:name="android.permission.INTERNET"/>

example/android/app/src/main/AndroidManifest.xml

@@ -2,9 +2,11 @@
     package="dev.yanshouwang.bluetooth_low_energy_example">
    <application
         android:label="bluetooth_low_energy_example"
+        android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher">
         <activity
             android:name=".MainActivity"
+            android:exported="true"
             android:launchMode="singleTop"
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
@@ -18,15 +20,6 @@
               android:name="io.flutter.embedding.android.NormalTheme"
               android:resource="@style/NormalTheme"
               />
-            <!-- Displays an Android View that continues showing the launch screen
-                 Drawable until Flutter paints its first frame, then this splash
-                 screen fades out. A splash screen is useful to avoid any visual
-                 gap between the end of Android's launch screen and the painting of
-                 Flutter's first frame. -->
-            <meta-data
-              android:name="io.flutter.embedding.android.SplashScreenDrawable"
-              android:resource="@drawable/launch_background"
-              />
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.LAUNCHER"/>

example/android/app/src/main/res/values-night/styles.xml

@@ -3,14 +3,14 @@
     <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is on -->
     <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
         <!-- Show a splash screen on the activity. Automatically removed when
-             Flutter draws its first frame -->
+             the Flutter engine draws its first frame -->
         <item name="android:windowBackground">@drawable/launch_background</item>
     </style>
     <!-- Theme applied to the Android Window as soon as the process has started.
          This theme determines the color of the Android Window while your
          Flutter UI initializes, as well as behind your Flutter UI while its
          running.
-         
+
          This Theme is only used starting with V2 of Flutter's Android embedding. -->
     <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
         <item name="android:windowBackground">?android:colorBackground</item>

example/android/app/src/main/res/values/styles.xml

@@ -3,14 +3,14 @@
     <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
     <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
         <!-- Show a splash screen on the activity. Automatically removed when
-             Flutter draws its first frame -->
+             the Flutter engine draws its first frame -->
         <item name="android:windowBackground">@drawable/launch_background</item>
     </style>
     <!-- Theme applied to the Android Window as soon as the process has started.
          This theme determines the color of the Android Window while your
          Flutter UI initializes, as well as behind your Flutter UI while its
          running.
-         
+
          This Theme is only used starting with V2 of Flutter's Android embedding. -->
     <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
         <item name="android:windowBackground">?android:colorBackground</item>

example/android/app/src/profile/AndroidManifest.xml

@@ -1,6 +1,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="dev.yanshouwang.bluetooth_low_energy_example">
-    <!-- Flutter needs it to communicate with the running application
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
          to allow setting breakpoints, to provide hot reload, etc.
     -->
     <uses-permission android:name="android.permission.INTERNET"/>

example/android/build.gradle

@@ -1,13 +1,12 @@
 buildscript {
-    ext.kotlin_version = '1.5.21'
+    ext.kotlin_version = '1.6.10'
     repositories {
         google()
         mavenCentral()
-        maven { url 'https://mirrors.cloud.tencent.com/nexus/repository/maven-public/' }
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.0'
+        classpath 'com.android.tools.build:gradle:7.1.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
@@ -16,13 +15,14 @@ allprojects {
     repositories {
         google()
         mavenCentral()
-        maven { url 'https://mirrors.cloud.tencent.com/nexus/repository/maven-public/' }
     }
 }
 
 rootProject.buildDir = '../build'
 subprojects {
     project.buildDir = "${rootProject.buildDir}/${project.name}"
+}
+subprojects {
     project.evaluationDependsOn(':app')
 }
 

example/android/gradle/wrapper/gradle-wrapper.properties

@@ -3,5 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-#distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip
-distributionUrl=https\://mirrors.cloud.tencent.com/gradle/gradle-6.7-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.4-all.zip

example/ios/.gitignore

@@ -1,3 +1,4 @@
+**/dgph
 *.mode1v3
 *.mode2v3
 *.moved-aside

example/ios/Flutter/AppFrameworkInfo.plist

@@ -21,6 +21,6 @@
   <key>CFBundleVersion</key>
   <string>1.0</string>
   <key>MinimumOSVersion</key>
-  <string>8.0</string>
+  <string>11.0</string>
 </dict>
 </plist>

example/ios/Podfile

@@ -1,5 +1,5 @@
 # Uncomment this line to define a global platform for your project
-platform :ios, '9.0'
+# platform :ios, '11.0'
 
 # CocoaPods analytics sends network stats synchronously affecting flutter build latency.
 ENV['COCOAPODS_DISABLE_STATS'] = 'true'

example/ios/Podfile.lock

@@ -1,9 +1,9 @@
 PODS:
   - bluetooth_low_energy (0.0.1):
     - Flutter
-    - SwiftProtobuf (~> 1.0)
+    - SwiftProtobuf (~> 1.20)
   - Flutter (1.0.0)
-  - SwiftProtobuf (1.17.0)
+  - SwiftProtobuf (1.20.1)
 
 DEPENDENCIES:
   - bluetooth_low_energy (from `.symlinks/plugins/bluetooth_low_energy/ios`)
@@ -20,10 +20,10 @@ EXTERNAL SOURCES:
     :path: Flutter
 
 SPEC CHECKSUMS:
-  bluetooth_low_energy: 9222b99f977897165e6ffaece386bd289ac8c1fb
-  Flutter: 434fef37c0980e73bb6479ef766c45957d4b510c
-  SwiftProtobuf: 9c85136c6ba74b0a1b84279dbf0f6db8efb714e0
+  bluetooth_low_energy: af34d921ca3a9e085cf6364c500050965acf25f9
+  Flutter: f04841e97a9d0b0a8025694d0796dd46242b2854
+  SwiftProtobuf: e40a7684079620e84ba522dbaeab0cddb0ec7ffd
 
-PODFILE CHECKSUM: a75497545d4391e2d394c3668e20cfb1c2bbd4aa
+PODFILE CHECKSUM: ef19549a9bc3046e7bb7d2fab4d021637c0c58a3
 
-COCOAPODS: 1.10.1
+COCOAPODS: 1.11.3

example/ios/Runner.xcodeproj/project.pbxproj

@@ -13,7 +13,7 @@
 		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
 		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
 		97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
-		EA280E36114EEC52A66510AF /* Pods_Runner.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 2F6363DB0F6B8F760A0B70E6 /* Pods_Runner.framework */; };
+		BC25F992B6ECFCC18D953308 /* Pods_Runner.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 3248507C6DD52333A770C1CB /* Pods_Runner.framework */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXCopyFilesBuildPhase section */
@@ -30,11 +30,11 @@
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
-		1173070BE6CFE927D74C0736 /* Pods-Runner.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.release.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"; sourceTree = "<group>"; };
 		1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GeneratedPluginRegistrant.h; sourceTree = "<group>"; };
 		1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GeneratedPluginRegistrant.m; sourceTree = "<group>"; };
-		2F6363DB0F6B8F760A0B70E6 /* Pods_Runner.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_Runner.framework; sourceTree = BUILT_PRODUCTS_DIR; };
+		3248507C6DD52333A770C1CB /* Pods_Runner.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_Runner.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = AppFrameworkInfo.plist; path = Flutter/AppFrameworkInfo.plist; sourceTree = "<group>"; };
+		5CB2CF9D872B54AC77EFD5AD /* Pods-Runner.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.profile.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig"; sourceTree = "<group>"; };
 		74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "Runner-Bridging-Header.h"; sourceTree = "<group>"; };
 		74858FAE1ED2DC5600515810 /* AppDelegate.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 		7AFA3C8E1D35360C0083082E /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = Release.xcconfig; path = Flutter/Release.xcconfig; sourceTree = "<group>"; };
@@ -45,8 +45,8 @@
 		97C146FD1CF9000F007C117D /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		97C147001CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
 		97C147021CF9000F007C117D /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
-		9E8C4C982EC9200D28D9557C /* Pods-Runner.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.profile.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig"; sourceTree = "<group>"; };
-		FA6DAFE6FDB9F8D1C4A8AEF3 /* Pods-Runner.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.debug.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"; sourceTree = "<group>"; };
+		AEA309A3A59074B58910681F /* Pods-Runner.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.debug.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"; sourceTree = "<group>"; };
+		C3AC24B274EC26E645389946 /* Pods-Runner.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.release.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -54,13 +54,21 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				EA280E36114EEC52A66510AF /* Pods_Runner.framework in Frameworks */,
+				BC25F992B6ECFCC18D953308 /* Pods_Runner.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		2B77126ACFA0B323BF67EC4C /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				3248507C6DD52333A770C1CB /* Pods_Runner.framework */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
 		9740EEB11CF90186004384FC /* Flutter */ = {
 			isa = PBXGroup;
 			children = (
@@ -78,8 +86,8 @@
 				9740EEB11CF90186004384FC /* Flutter */,
 				97C146F01CF9000F007C117D /* Runner */,
 				97C146EF1CF9000F007C117D /* Products */,
-				A19CF493038BEE74587FB0E8 /* Pods */,
-				990CDB7BA621E0B7AFA0C6BE /* Frameworks */,
+				F7511A57B6D81C59C9E0353E /* Pods */,
+				2B77126ACFA0B323BF67EC4C /* Frameworks */,
 			);
 			sourceTree = "<group>";
 		};
@@ -106,20 +114,12 @@
 			path = Runner;
 			sourceTree = "<group>";
 		};
-		990CDB7BA621E0B7AFA0C6BE /* Frameworks */ = {
+		F7511A57B6D81C59C9E0353E /* Pods */ = {
 			isa = PBXGroup;
 			children = (
-				2F6363DB0F6B8F760A0B70E6 /* Pods_Runner.framework */,
-			);
-			name = Frameworks;
-			sourceTree = "<group>";
-		};
-		A19CF493038BEE74587FB0E8 /* Pods */ = {
-			isa = PBXGroup;
-			children = (
-				FA6DAFE6FDB9F8D1C4A8AEF3 /* Pods-Runner.debug.xcconfig */,
-				1173070BE6CFE927D74C0736 /* Pods-Runner.release.xcconfig */,
-				9E8C4C982EC9200D28D9557C /* Pods-Runner.profile.xcconfig */,
+				AEA309A3A59074B58910681F /* Pods-Runner.debug.xcconfig */,
+				C3AC24B274EC26E645389946 /* Pods-Runner.release.xcconfig */,
+				5CB2CF9D872B54AC77EFD5AD /* Pods-Runner.profile.xcconfig */,
 			);
 			path = Pods;
 			sourceTree = "<group>";
@@ -131,14 +131,14 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */;
 			buildPhases = (
-				4DEF012D22BCBC3AF731DE9C /* [CP] Check Pods Manifest.lock */,
+				224727E4C00C24BC3CD4292A /* [CP] Check Pods Manifest.lock */,
 				9740EEB61CF901F6004384FC /* Run Script */,
 				97C146EA1CF9000F007C117D /* Sources */,
 				97C146EB1CF9000F007C117D /* Frameworks */,
 				97C146EC1CF9000F007C117D /* Resources */,
 				9705A1C41CF9048500538489 /* Embed Frameworks */,
 				3B06AD1E1E4923F5004D2608 /* Thin Binary */,
-				EDB3731BEABF1E16CE6A52EB /* [CP] Embed Pods Frameworks */,
+				DCBB4C37F33FFC666159F299 /* [CP] Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@@ -155,7 +155,7 @@
 		97C146E61CF9000F007C117D /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 1020;
+				LastUpgradeCheck = 1300;
 				ORGANIZATIONNAME = "";
 				TargetAttributes = {
 					97C146ED1CF9000F007C117D = {
@@ -197,21 +197,7 @@
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXShellScriptBuildPhase section */
-		3B06AD1E1E4923F5004D2608 /* Thin Binary */ = {
-			isa = PBXShellScriptBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-			);
-			inputPaths = (
-			);
-			name = "Thin Binary";
-			outputPaths = (
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-			shellPath = /bin/sh;
-			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" embed_and_thin";
-		};
-		4DEF012D22BCBC3AF731DE9C /* [CP] Check Pods Manifest.lock */ = {
+		224727E4C00C24BC3CD4292A /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
@@ -233,6 +219,20 @@
 			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
 			showEnvVarsInLog = 0;
 		};
+		3B06AD1E1E4923F5004D2608 /* Thin Binary */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "Thin Binary";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" embed_and_thin";
+		};
 		9740EEB61CF901F6004384FC /* Run Script */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
@@ -247,7 +247,7 @@
 			shellPath = /bin/sh;
 			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" build";
 		};
-		EDB3731BEABF1E16CE6A52EB /* [CP] Embed Pods Frameworks */ = {
+		DCBB4C37F33FFC666159F299 /* [CP] Embed Pods Frameworks */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
@@ -339,7 +339,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SUPPORTED_PLATFORMS = iphoneos;
@@ -417,7 +417,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
@@ -466,7 +466,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SUPPORTED_PLATFORMS = iphoneos;

example/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1020"
+   LastUpgradeVersion = "1300"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -27,8 +27,6 @@
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       shouldUseLaunchSchemeArgsEnv = "YES">
-      <Testables>
-      </Testables>
       <MacroExpansion>
          <BuildableReference
             BuildableIdentifier = "primary"
@@ -38,8 +36,8 @@
             ReferencedContainer = "container:Runner.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
+      <Testables>
+      </Testables>
    </TestAction>
    <LaunchAction
       buildConfiguration = "Debug"
@@ -61,8 +59,6 @@
             ReferencedContainer = "container:Runner.xcodeproj">
          </BuildableReference>
       </BuildableProductRunnable>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Profile"

example/ios/Runner/Info.plist

@@ -2,8 +2,12 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
+	<key>CADisableMinimumFrameDurationOnPhone</key>
+	<true/>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleDisplayName</key>
+	<string>Bluetooth Low Energy</string>
 	<key>CFBundleExecutable</key>
 	<string>$(EXECUTABLE_NAME)</string>
 	<key>CFBundleIdentifier</key>
@@ -23,7 +27,7 @@
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
 	<key>NSBluetoothAlwaysUsageDescription</key>
-	<string>We need to use your bluetooth to communicate with other BLE devices.</string>
+	<string>Let's try to communicate use the bluetooth low energy!</string>
 	<key>UILaunchStoryboardName</key>
 	<string>LaunchScreen</string>
 	<key>UIMainStoryboardFile</key>