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()
+
+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

@@ -3,7 +3,7 @@
     <!-- 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.

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

@@ -3,7 +3,7 @@
     <!-- 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.

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>