修复读取 CCCD 报错的问题，写入时更新特征值 (#50)

* 修复 CCCD 无法读取的问题

* 优化代码

* 调整部分必需参数为可空参数

* 调整接口

* 写入时更新特征值

* 调整接口

* 适配新接口

* 调整依赖项

bluetooth_low_energy/CHANGELOG.md

@@ -1,3 +1,9 @@
+## 5.0.6
+
+* `Android` Fix the issue that [throws when read the CCCD(Client Characteristic Config Descriptor, 0x2902)](https://github.com/yanshouwang/bluetooth_low_energy/issues/47).
+* `Android` `iOS` Update characteristic's value when write by centrals.
+* Implements new Api.
+
 ## 5.0.5
 
 * `Windows` Fix the [`CentralManager#discoverGATT`, `CentralManager#readCharacteristic` and `CentralManager#readDescriptor` issue](https://github.com/yanshouwang/bluetooth_low_energy/issues/42) caused by cache mode.

bluetooth_low_energy/example/lib/main.dart

@@ -993,7 +993,7 @@ class _AdvertiserViewState extends State<AdvertiserView>
     await PeripheralManager.instance.addService(batteryService);
     final elements = List.generate(1000, (i) => i % 256);
     final value = Uint8List.fromList(elements);
-    final myService = GattService(
+    final service = GattService(
       uuid: UUID.short(100),
       characteristics: [
         GattCharacteristic(
@@ -1010,37 +1010,37 @@ class _AdvertiserViewState extends State<AdvertiserView>
             GattCharacteristicProperty.write,
             GattCharacteristicProperty.writeWithoutResponse,
           ],
-          value: Uint8List.fromList([]),
           descriptors: [],
         ),
         GattCharacteristic(
           uuid: UUID.short(202),
           properties: [
             GattCharacteristicProperty.notify,
-            GattCharacteristicProperty.indicate,
           ],
-          value: Uint8List.fromList([]),
           descriptors: [],
         ),
         GattCharacteristic(
           uuid: UUID.short(203),
           properties: [
-            GattCharacteristicProperty.notify,
+            GattCharacteristicProperty.indicate,
           ],
-          value: Uint8List.fromList([]),
           descriptors: [],
         ),
         GattCharacteristic(
           uuid: UUID.short(204),
           properties: [
+            GattCharacteristicProperty.read,
+            GattCharacteristicProperty.write,
+            GattCharacteristicProperty.writeWithoutResponse,
+            GattCharacteristicProperty.notify,
             GattCharacteristicProperty.indicate,
           ],
-          value: Uint8List.fromList([]),
+          value: value,
           descriptors: [],
         ),
       ],
     );
-    await PeripheralManager.instance.addService(myService);
+    await PeripheralManager.instance.addService(service);
     final advertisement = Advertisement(
       name: 'le12138',
       manufacturerSpecificData: ManufacturerSpecificData(

bluetooth_low_energy/example/pubspec.lock

@@ -23,47 +23,47 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "5.0.5"
+    version: "5.0.6"
   bluetooth_low_energy_android:
     dependency: transitive
     description:
       name: bluetooth_low_energy_android
-      sha256: "703faeeecce61887af4fa34bce5e0f5c25019d585f2e05723948332512c4eedc"
+      sha256: b06da128d4a15e094dac67e52e701fd331441c81425b0c776598aab01a07ccfe
       url: "https://pub.dev"
     source: hosted
-    version: "5.0.2"
+    version: "5.0.4"
   bluetooth_low_energy_darwin:
     dependency: transitive
     description:
       name: bluetooth_low_energy_darwin
-      sha256: e85bc6e97a087f2bb934a1b12953a0f6aab8dfdbe57302cb2bf6d61b996fa2ee
+      sha256: d8c37f27c48ad523e5c32d1002d8e67570b1f4e6d69c54e09bca152a07f6ab3f
       url: "https://pub.dev"
     source: hosted
-    version: "5.0.3"
+    version: "5.0.5"
   bluetooth_low_energy_linux:
     dependency: transitive
     description:
       name: bluetooth_low_energy_linux
-      sha256: "100dc824a9b409442e7018994de74d56d65faa95b8c6fbbf5a8c0ae70cd58286"
+      sha256: "2809830a8b67eac5d53fdc6e907aa878ec61884d6e6a42da2b79b826410c8327"
       url: "https://pub.dev"
     source: hosted
-    version: "5.0.0"
+    version: "5.0.2"
   bluetooth_low_energy_platform_interface:
     dependency: transitive
     description:
       name: bluetooth_low_energy_platform_interface
-      sha256: "54f92ab2d7746fb6f2b4a40a48cd7eb8e3bf772f3ee89e1979d4d7b741fb2a05"
+      sha256: "5af74eb8f97a896dfdbcff2da284d4fe5b4e2e49ebb2f46f826ac1810f66e4d7"
       url: "https://pub.dev"
     source: hosted
-    version: "5.0.0"
+    version: "5.0.2"
   bluetooth_low_energy_windows:
     dependency: transitive
     description:
       name: bluetooth_low_energy_windows
-      sha256: e2b812e00ff808feb5dca9404a5310f21fceecd2656f0a2d51f0bbeb9e8b258b
+      sha256: "5a0b22003d14dc84f3f16e73a77f2645df034badb9003f368e6f9bc02e8b249a"
       url: "https://pub.dev"
     source: hosted
-    version: "5.0.1"
+    version: "5.0.3"
   bluez:
     dependency: transitive
     description:
@@ -392,4 +392,4 @@ packages:
     version: "6.5.0"
 sdks:
   dart: ">=3.2.0 <4.0.0"
-  flutter: ">=3.3.0"
+  flutter: ">=3.0.0"

bluetooth_low_energy/pubspec.yaml

@@ -1,20 +1,20 @@
 name: bluetooth_low_energy
 description: A Flutter plugin for controlling the bluetooth low energy, supports central and peripheral apis.
-version: 5.0.5
+version: 5.0.6
 homepage: https://github.com/yanshouwang/bluetooth_low_energy
 
 environment:
   sdk: ">=3.0.0 <4.0.0"
-  flutter: ">=3.3.0"
+  flutter: ">=3.0.0"
 
 dependencies:
   flutter:
     sdk: flutter
-  bluetooth_low_energy_platform_interface: ^5.0.0
+  bluetooth_low_energy_platform_interface: ^5.0.2
-  bluetooth_low_energy_android: ^5.0.2
+  bluetooth_low_energy_android: ^5.0.4
-  bluetooth_low_energy_darwin: ^5.0.3
+  bluetooth_low_energy_darwin: ^5.0.5
-  bluetooth_low_energy_windows: ^5.0.1
+  bluetooth_low_energy_windows: ^5.0.3
-  bluetooth_low_energy_linux: ^5.0.0
+  bluetooth_low_energy_linux: ^5.0.2
 
 dev_dependencies:
   flutter_test:

bluetooth_low_energy_android/CHANGELOG.md

@@ -1,3 +1,13 @@
+## 5.0.4
+
+* Change flutter minimum version to 3.0.0.
+
+## 5.0.3
+
+* Fix the issue that [throws when read the CCCD(Client Characteristic Config Descriptor, 0x2902)](https://github.com/yanshouwang/bluetooth_low_energy/issues/47).
+* Update characteristic's value when write by centrals.
+* Implements new Api.
+
 ## 5.0.2
 
 * Fix the ConcurrentModificationException when `PeripheralManager#clearServices` is called.

bluetooth_low_energy_android/android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy_android/MyApi.g.kt

@@ -1077,21 +1077,6 @@ class MyPeripheralManagerFlutterApi(private val binaryMessenger: BinaryMessenger
       } 
     }
   }
-  fun onExecuteWrite(addressArgsArg: String, idArgsArg: Long, executeArgsArg: Boolean, callback: (Result<Unit>) -> Unit) {
-    val channelName = "dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onExecuteWrite"
-    val channel = BasicMessageChannel<Any?>(binaryMessenger, channelName, codec)
-    channel.send(listOf(addressArgsArg, idArgsArg, executeArgsArg)) {
-      if (it is List<*>) {
-        if (it.size > 1) {
-          callback(Result.failure(FlutterError(it[0] as String, it[1] as String, it[2] as String?)))
-        } else {
-          callback(Result.success(Unit))
-        }
-      } else {
-        callback(Result.failure(createConnectionError(channelName)))
-      } 
-    }
-  }
   fun onCharacteristicNotifyStateChanged(addressArgsArg: String, hashCodeArgsArg: Long, stateNumberArgsArg: Long, callback: (Result<Unit>) -> Unit) {
     val channelName = "dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onCharacteristicNotifyStateChanged"
     val channel = BasicMessageChannel<Any?>(binaryMessenger, channelName, codec)
@@ -1107,4 +1092,49 @@ class MyPeripheralManagerFlutterApi(private val binaryMessenger: BinaryMessenger
       } 
     }
   }
+  fun onDescriptorReadRequest(addressArgsArg: String, hashCodeArgsArg: Long, idArgsArg: Long, offsetArgsArg: Long, callback: (Result<Unit>) -> Unit) {
+    val channelName = "dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onDescriptorReadRequest"
+    val channel = BasicMessageChannel<Any?>(binaryMessenger, channelName, codec)
+    channel.send(listOf(addressArgsArg, hashCodeArgsArg, idArgsArg, offsetArgsArg)) {
+      if (it is List<*>) {
+        if (it.size > 1) {
+          callback(Result.failure(FlutterError(it[0] as String, it[1] as String, it[2] as String?)))
+        } else {
+          callback(Result.success(Unit))
+        }
+      } else {
+        callback(Result.failure(createConnectionError(channelName)))
+      } 
+    }
+  }
+  fun onDescriptorWriteRequest(addressArgsArg: String, hashCodeArgsArg: Long, idArgsArg: Long, offsetArgsArg: Long, valueArgsArg: ByteArray, preparedWriteArgsArg: Boolean, responseNeededArgsArg: Boolean, callback: (Result<Unit>) -> Unit) {
+    val channelName = "dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onDescriptorWriteRequest"
+    val channel = BasicMessageChannel<Any?>(binaryMessenger, channelName, codec)
+    channel.send(listOf(addressArgsArg, hashCodeArgsArg, idArgsArg, offsetArgsArg, valueArgsArg, preparedWriteArgsArg, responseNeededArgsArg)) {
+      if (it is List<*>) {
+        if (it.size > 1) {
+          callback(Result.failure(FlutterError(it[0] as String, it[1] as String, it[2] as String?)))
+        } else {
+          callback(Result.success(Unit))
+        }
+      } else {
+        callback(Result.failure(createConnectionError(channelName)))
+      } 
+    }
+  }
+  fun onExecuteWrite(addressArgsArg: String, idArgsArg: Long, executeArgsArg: Boolean, callback: (Result<Unit>) -> Unit) {
+    val channelName = "dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onExecuteWrite"
+    val channel = BasicMessageChannel<Any?>(binaryMessenger, channelName, codec)
+    channel.send(listOf(addressArgsArg, idArgsArg, executeArgsArg)) {
+      if (it is List<*>) {
+        if (it.size > 1) {
+          callback(Result.failure(FlutterError(it[0] as String, it[1] as String, it[2] as String?)))
+        } else {
+          callback(Result.success(Unit))
+        }
+      } else {
+        callback(Result.failure(createConnectionError(channelName)))
+      } 
+    }
+  }
 }

bluetooth_low_energy_android/android/src/main/kotlin/dev/yanshouwang/bluetooth_low_energy_android/MyPeripheralManager.kt

@@ -13,7 +13,6 @@ import android.bluetooth.le.AdvertiseCallback
 import android.bluetooth.le.AdvertiseSettings
 import android.content.Context
 import android.os.Build
-import android.util.Log
 import io.flutter.plugin.common.BinaryMessenger
 
 class MyPeripheralManager(context: Context, binaryMessenger: BinaryMessenger) :
@@ -116,21 +115,9 @@ class MyPeripheralManager(context: Context, binaryMessenger: BinaryMessenger) :
             val characteristicsArgs = serviceArgs.characteristicsArgs.filterNotNull()
             for (characteristicArgs in characteristicsArgs) {
                 val characteristic = characteristicArgs.toCharacteristic()
-                val cccDescriptor = BluetoothGattDescriptor(
-                    CLIENT_CHARACTERISTIC_CONFIG_UUID,
-                    BluetoothGattDescriptor.PERMISSION_READ or BluetoothGattDescriptor.PERMISSION_WRITE
-                )
-                val cccDescriptorAdded = characteristic.addDescriptor(cccDescriptor)
-                if (!cccDescriptorAdded) {
-                    throw IllegalStateException()
-                }
                 val descriptorsArgs = characteristicArgs.descriptorsArgs.filterNotNull()
                 for (descriptorArgs in descriptorsArgs) {
                     val descriptor = descriptorArgs.toDescriptor()
-                    if (descriptor.uuid == CLIENT_CHARACTERISTIC_CONFIG_UUID) {
-                        // Already added.
-                        continue
-                    }
                     val descriptorHashCodeArgs = descriptorArgs.hashCodeArgs
                     val descriptorHashCode = descriptor.hashCode()
                     this.mDescriptorsArgs[descriptorHashCode] = descriptorArgs
@@ -235,7 +222,7 @@ class MyPeripheralManager(context: Context, binaryMessenger: BinaryMessenger) :
         val offset = offsetArgs.toInt()
         val sent = mServer.sendResponse(device, requestId, status, offset, valueArgs)
         if (!sent) {
-            throw IllegalStateException("Send read characteristic reply failed.")
+            throw IllegalStateException("Send response failed.")
         }
     }
 
@@ -366,14 +353,13 @@ class MyPeripheralManager(context: Context, binaryMessenger: BinaryMessenger) :
     fun onDescriptorReadRequest(
         device: BluetoothDevice, requestId: Int, offset: Int, descriptor: BluetoothGattDescriptor
     ) {
-        val status = BluetoothGatt.GATT_SUCCESS
+        val addressArgs = device.address
         val hashCode = descriptor.hashCode()
-        val descriptorArgs = mDescriptorsArgs[hashCode] as MyGattDescriptorArgs
+        val descriptorArgs = mDescriptorsArgs[hashCode] ?: return
-        val value = descriptorArgs.valueArgs
+        val hashCodeArgs = descriptorArgs.hashCodeArgs
-        val sent = mServer.sendResponse(device, requestId, status, offset, value)
+        val idArgs = requestId.toLong()
-        if (!sent) {
+        val offsetArgs = offset.toLong()
-            Log.e(TAG, "onDescriptorReadRequest: send response failed.")
+        mApi.onDescriptorReadRequest(addressArgs, hashCodeArgs, idArgs, offsetArgs) {}
-        }
     }
 
     fun onDescriptorWriteRequest(
@@ -385,24 +371,18 @@ class MyPeripheralManager(context: Context, binaryMessenger: BinaryMessenger) :
         offset: Int,
         value: ByteArray
     ) {
+        val addressArgs = device.address
+        val hashCode = descriptor.hashCode()
+        val descriptorArgs = mDescriptorsArgs[hashCode] ?: return
+        val hashCodeArgs = descriptorArgs.hashCodeArgs
+        val idArgs = requestId.toLong()
+        val offsetArgs = offset.toLong()
+        mApi.onDescriptorWriteRequest(
+            addressArgs, hashCodeArgs, idArgs, offsetArgs, value, preparedWrite, responseNeeded
+        ) {}
         if (descriptor.uuid == CLIENT_CHARACTERISTIC_CONFIG_UUID) {
-            val addressArgs = device.address
             val characteristic = descriptor.characteristic
-            val hashCode = characteristic.hashCode()
+            mOnCharacteristicNotifyStateChanged(device, characteristic, value)
-            val characteristicArgs = mCharacteristicsArgs[hashCode] ?: return
-            val hashCodeArgs = characteristicArgs.hashCodeArgs
-            val stateArgs = value.toNotifyStateArgs()
-            val stateNumberArgs = stateArgs.raw.toLong()
-            mApi.onCharacteristicNotifyStateChanged(
-                addressArgs, hashCodeArgs, stateNumberArgs
-            ) {}
-        }
-        if (responseNeeded) {
-            val status = BluetoothGatt.GATT_SUCCESS
-            val sent = mServer.sendResponse(device, requestId, status, offset, value)
-            if (!sent) {
-                Log.e(TAG, "onDescriptorReadRequest: send response failed.")
-            }
         }
     }
 
@@ -464,4 +444,18 @@ class MyPeripheralManager(context: Context, binaryMessenger: BinaryMessenger) :
         mServer.close()
         mOpening = false
     }
+
+    private fun mOnCharacteristicNotifyStateChanged(
+        device: BluetoothDevice,
+        characteristic: BluetoothGattCharacteristic,
+        value: ByteArray
+    ) {
+        val addressArgs = device.address
+        val hashCode = characteristic.hashCode()
+        val characteristicArgs = mCharacteristicsArgs[hashCode] ?: return
+        val hashCodeArgs = characteristicArgs.hashCodeArgs
+        val stateArgs = value.toNotifyStateArgs()
+        val stateNumberArgs = stateArgs.raw.toLong()
+        mApi.onCharacteristicNotifyStateChanged(addressArgs, hashCodeArgs, stateNumberArgs) {}
+    }
 }

bluetooth_low_energy_android/example/lib/main.dart

@@ -993,32 +993,32 @@ class _AdvertiserViewState extends State<AdvertiserView>
             GattCharacteristicProperty.write,
             GattCharacteristicProperty.writeWithoutResponse,
           ],
-          value: Uint8List.fromList([]),
           descriptors: [],
         ),
         GattCharacteristic(
           uuid: UUID.short(202),
           properties: [
             GattCharacteristicProperty.notify,
-            GattCharacteristicProperty.indicate,
           ],
-          value: Uint8List.fromList([]),
           descriptors: [],
         ),
         GattCharacteristic(
           uuid: UUID.short(203),
           properties: [
-            GattCharacteristicProperty.notify,
+            GattCharacteristicProperty.indicate,
           ],
-          value: Uint8List.fromList([]),
           descriptors: [],
         ),
         GattCharacteristic(
           uuid: UUID.short(204),
           properties: [
+            GattCharacteristicProperty.read,
+            GattCharacteristicProperty.write,
+            GattCharacteristicProperty.writeWithoutResponse,
+            GattCharacteristicProperty.notify,
             GattCharacteristicProperty.indicate,
           ],
-          value: Uint8List.fromList([]),
+          value: value,
           descriptors: [],
         ),
       ],

bluetooth_low_energy_android/example/pubspec.lock

@@ -15,15 +15,15 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "5.0.1"
+    version: "5.0.4"
   bluetooth_low_energy_platform_interface:
     dependency: "direct main"
     description:
       name: bluetooth_low_energy_platform_interface
-      sha256: "54f92ab2d7746fb6f2b4a40a48cd7eb8e3bf772f3ee89e1979d4d7b741fb2a05"
+      sha256: "5af74eb8f97a896dfdbcff2da284d4fe5b4e2e49ebb2f46f826ac1810f66e4d7"
       url: "https://pub.dev"
     source: hosted
-    version: "5.0.0"
+    version: "5.0.2"
   boolean_selector:
     dependency: transitive
     description:
@@ -312,4 +312,4 @@ packages:
     version: "3.0.2"
 sdks:
   dart: ">=3.2.0-194.0.dev <4.0.0"
-  flutter: ">=3.3.0"
+  flutter: ">=3.0.0"

bluetooth_low_energy_android/lib/src/my_api.dart

@@ -204,17 +204,13 @@ extension MyGattDescriptorX on MyGattDescriptor {
 }
 
 extension MyGattCharacteristicX on MyGattCharacteristic {
-  MyGattCharacteristicArgs toArgs() {
+  MyGattCharacteristicArgs toArgs(List<MyGattDescriptorArgs> descriptorsArgs) {
     final hashCodeArgs = hashCode;
     final uuidArgs = uuid.toArgs();
     final propertyNumbersArgs = properties.map((property) {
       final propertyArgs = property.toArgs();
       return propertyArgs.index;
     }).toList();
-    final descriptorsArgs = descriptors
-        .cast<MyGattDescriptor>()
-        .map((descriptor) => descriptor.toArgs())
-        .toList();
     return MyGattCharacteristicArgs(
       hashCodeArgs: hashCodeArgs,
       uuidArgs: uuidArgs,
@@ -225,13 +221,9 @@ extension MyGattCharacteristicX on MyGattCharacteristic {
 }
 
 extension MyGattServiceX on MyGattService {
-  MyGattServiceArgs toArgs() {
+  MyGattServiceArgs toArgs(List<MyGattCharacteristicArgs> characteristicsArgs) {
     final hashCodeArgs = hashCode;
     final uuidArgs = uuid.toArgs();
-    final characteristicsArgs = characteristics
-        .cast<MyGattCharacteristic>()
-        .map((characteristic) => characteristic.toArgs())
-        .toList();
     return MyGattServiceArgs(
       hashCodeArgs: hashCodeArgs,
       uuidArgs: uuidArgs,

bluetooth_low_energy_android/lib/src/my_api.g.dart

@@ -1085,10 +1085,14 @@ abstract class MyPeripheralManagerFlutterApi {
 
   void onCharacteristicWriteRequest(String addressArgs, int hashCodeArgs, int idArgs, int offsetArgs, Uint8List valueArgs, bool preparedWriteArgs, bool responseNeededArgs);
 
-  void onExecuteWrite(String addressArgs, int idArgs, bool executeArgs);
-
   void onCharacteristicNotifyStateChanged(String addressArgs, int hashCodeArgs, int stateNumberArgs);
 
+  void onDescriptorReadRequest(String addressArgs, int hashCodeArgs, int idArgs, int offsetArgs);
+
+  void onDescriptorWriteRequest(String addressArgs, int hashCodeArgs, int idArgs, int offsetArgs, Uint8List valueArgs, bool preparedWriteArgs, bool responseNeededArgs);
+
+  void onExecuteWrite(String addressArgs, int idArgs, bool executeArgs);
+
   static void setup(MyPeripheralManagerFlutterApi? api, {BinaryMessenger? binaryMessenger}) {
     {
       final BasicMessageChannel<Object?> __pigeon_channel = BasicMessageChannel<Object?>(
@@ -1248,37 +1252,6 @@ abstract class MyPeripheralManagerFlutterApi {
         });
       }
     }
-    {
-      final BasicMessageChannel<Object?> __pigeon_channel = BasicMessageChannel<Object?>(
-          'dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onExecuteWrite', pigeonChannelCodec,
-          binaryMessenger: binaryMessenger);
-      if (api == null) {
-        __pigeon_channel.setMessageHandler(null);
-      } else {
-        __pigeon_channel.setMessageHandler((Object? message) async {
-          assert(message != null,
-          'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onExecuteWrite was null.');
-          final List<Object?> args = (message as List<Object?>?)!;
-          final String? arg_addressArgs = (args[0] as String?);
-          assert(arg_addressArgs != null,
-              'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onExecuteWrite was null, expected non-null String.');
-          final int? arg_idArgs = (args[1] as int?);
-          assert(arg_idArgs != null,
-              'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onExecuteWrite was null, expected non-null int.');
-          final bool? arg_executeArgs = (args[2] as bool?);
-          assert(arg_executeArgs != null,
-              'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onExecuteWrite was null, expected non-null bool.');
-          try {
-            api.onExecuteWrite(arg_addressArgs!, arg_idArgs!, arg_executeArgs!);
-            return wrapResponse(empty: true);
-          } on PlatformException catch (e) {
-            return wrapResponse(error: e);
-          }          catch (e) {
-            return wrapResponse(error: PlatformException(code: 'error', message: e.toString()));
-          }
-        });
-      }
-    }
     {
       final BasicMessageChannel<Object?> __pigeon_channel = BasicMessageChannel<Object?>(
           'dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onCharacteristicNotifyStateChanged', pigeonChannelCodec,
@@ -1310,5 +1283,113 @@ abstract class MyPeripheralManagerFlutterApi {
         });
       }
     }
+    {
+      final BasicMessageChannel<Object?> __pigeon_channel = BasicMessageChannel<Object?>(
+          'dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onDescriptorReadRequest', pigeonChannelCodec,
+          binaryMessenger: binaryMessenger);
+      if (api == null) {
+        __pigeon_channel.setMessageHandler(null);
+      } else {
+        __pigeon_channel.setMessageHandler((Object? message) async {
+          assert(message != null,
+          'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onDescriptorReadRequest was null.');
+          final List<Object?> args = (message as List<Object?>?)!;
+          final String? arg_addressArgs = (args[0] as String?);
+          assert(arg_addressArgs != null,
+              'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onDescriptorReadRequest was null, expected non-null String.');
+          final int? arg_hashCodeArgs = (args[1] as int?);
+          assert(arg_hashCodeArgs != null,
+              'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onDescriptorReadRequest was null, expected non-null int.');
+          final int? arg_idArgs = (args[2] as int?);
+          assert(arg_idArgs != null,
+              'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onDescriptorReadRequest was null, expected non-null int.');
+          final int? arg_offsetArgs = (args[3] as int?);
+          assert(arg_offsetArgs != null,
+              'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onDescriptorReadRequest was null, expected non-null int.');
+          try {
+            api.onDescriptorReadRequest(arg_addressArgs!, arg_hashCodeArgs!, arg_idArgs!, arg_offsetArgs!);
+            return wrapResponse(empty: true);
+          } on PlatformException catch (e) {
+            return wrapResponse(error: e);
+          }          catch (e) {
+            return wrapResponse(error: PlatformException(code: 'error', message: e.toString()));
+          }
+        });
+      }
+    }
+    {
+      final BasicMessageChannel<Object?> __pigeon_channel = BasicMessageChannel<Object?>(
+          'dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onDescriptorWriteRequest', pigeonChannelCodec,
+          binaryMessenger: binaryMessenger);
+      if (api == null) {
+        __pigeon_channel.setMessageHandler(null);
+      } else {
+        __pigeon_channel.setMessageHandler((Object? message) async {
+          assert(message != null,
+          'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onDescriptorWriteRequest was null.');
+          final List<Object?> args = (message as List<Object?>?)!;
+          final String? arg_addressArgs = (args[0] as String?);
+          assert(arg_addressArgs != null,
+              'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onDescriptorWriteRequest was null, expected non-null String.');
+          final int? arg_hashCodeArgs = (args[1] as int?);
+          assert(arg_hashCodeArgs != null,
+              'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onDescriptorWriteRequest was null, expected non-null int.');
+          final int? arg_idArgs = (args[2] as int?);
+          assert(arg_idArgs != null,
+              'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onDescriptorWriteRequest was null, expected non-null int.');
+          final int? arg_offsetArgs = (args[3] as int?);
+          assert(arg_offsetArgs != null,
+              'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onDescriptorWriteRequest was null, expected non-null int.');
+          final Uint8List? arg_valueArgs = (args[4] as Uint8List?);
+          assert(arg_valueArgs != null,
+              'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onDescriptorWriteRequest was null, expected non-null Uint8List.');
+          final bool? arg_preparedWriteArgs = (args[5] as bool?);
+          assert(arg_preparedWriteArgs != null,
+              'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onDescriptorWriteRequest was null, expected non-null bool.');
+          final bool? arg_responseNeededArgs = (args[6] as bool?);
+          assert(arg_responseNeededArgs != null,
+              'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onDescriptorWriteRequest was null, expected non-null bool.');
+          try {
+            api.onDescriptorWriteRequest(arg_addressArgs!, arg_hashCodeArgs!, arg_idArgs!, arg_offsetArgs!, arg_valueArgs!, arg_preparedWriteArgs!, arg_responseNeededArgs!);
+            return wrapResponse(empty: true);
+          } on PlatformException catch (e) {
+            return wrapResponse(error: e);
+          }          catch (e) {
+            return wrapResponse(error: PlatformException(code: 'error', message: e.toString()));
+          }
+        });
+      }
+    }
+    {
+      final BasicMessageChannel<Object?> __pigeon_channel = BasicMessageChannel<Object?>(
+          'dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onExecuteWrite', pigeonChannelCodec,
+          binaryMessenger: binaryMessenger);
+      if (api == null) {
+        __pigeon_channel.setMessageHandler(null);
+      } else {
+        __pigeon_channel.setMessageHandler((Object? message) async {
+          assert(message != null,
+          'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onExecuteWrite was null.');
+          final List<Object?> args = (message as List<Object?>?)!;
+          final String? arg_addressArgs = (args[0] as String?);
+          assert(arg_addressArgs != null,
+              'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onExecuteWrite was null, expected non-null String.');
+          final int? arg_idArgs = (args[1] as int?);
+          assert(arg_idArgs != null,
+              'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onExecuteWrite was null, expected non-null int.');
+          final bool? arg_executeArgs = (args[2] as bool?);
+          assert(arg_executeArgs != null,
+              'Argument for dev.flutter.pigeon.bluetooth_low_energy_android.MyPeripheralManagerFlutterApi.onExecuteWrite was null, expected non-null bool.');
+          try {
+            api.onExecuteWrite(arg_addressArgs!, arg_idArgs!, arg_executeArgs!);
+            return wrapResponse(empty: true);
+          } on PlatformException catch (e) {
+            return wrapResponse(error: e);
+          }          catch (e) {
+            return wrapResponse(error: PlatformException(code: 'error', message: e.toString()));
+          }
+        });
+      }
+    }
   }
 }

bluetooth_low_energy_android/lib/src/my_peripheral_manager.dart

@@ -21,9 +21,11 @@ class MyPeripheralManager extends PeripheralManager
 
   final Map<String, MyCentral2> _centrals;
   final Map<int, Map<int, MyGattCharacteristic>> _characteristics;
+  final Map<int, Map<int, MyGattDescriptor>> _descriptors;
   final Map<String, int> _mtus;
   final Map<String, Map<int, bool>> _confirms;
   final Map<String, MyGattCharacteristic> _preparedCharacteristics;
+  final Map<String, MyGattDescriptor> _preparedDescriptors;
   final Map<String, List<int>> _preparedValue;
 
   BluetoothLowEnergyState _state;
@@ -37,9 +39,11 @@ class MyPeripheralManager extends PeripheralManager
             StreamController.broadcast(),
         _centrals = {},
         _characteristics = {},
+        _descriptors = {},
         _mtus = {},
         _confirms = {},
         _preparedCharacteristics = {},
+        _preparedDescriptors = {},
         _preparedValue = {},
         _state = BluetoothLowEnergyState.unknown;
 
@@ -75,14 +79,39 @@ class MyPeripheralManager extends PeripheralManager
     if (service is! MyGattService) {
       throw TypeError();
     }
-    final serviceArgs = service.toArgs();
+    final characteristics = <int, MyGattCharacteristic>{};
-    final hashCodeArgs = serviceArgs.hashCodeArgs;
+    final descriptors = <int, MyGattDescriptor>{};
-    logger.info('addService: $hashCodeArgs');
+    final characteristicsArgs = <MyGattCharacteristicArgs>[];
+    for (var characteristic in service.characteristics) {
+      final descriptorsArgs = <MyGattDescriptorArgs>[];
+      final properties = characteristic.properties;
+      final canNotify =
+          properties.contains(GattCharacteristicProperty.notify) ||
+              properties.contains(GattCharacteristicProperty.indicate);
+      if (canNotify) {
+        // CLIENT_CHARACTERISTIC_CONFIG
+        final cccDescriptor = MyGattDescriptor(
+          uuid: UUID.short(0x2902),
+          value: Uint8List.fromList([0x00, 0x00]),
+        );
+        final cccDescriptorArgs = cccDescriptor.toArgs();
+        descriptorsArgs.add(cccDescriptorArgs);
+        descriptors[cccDescriptorArgs.hashCodeArgs] = cccDescriptor;
+      }
+      for (var descriptor in characteristic.descriptors) {
+        final descriptorArgs = descriptor.toArgs();
+        descriptorsArgs.add(descriptorArgs);
+        descriptors[descriptorArgs.hashCodeArgs] = descriptor;
+      }
+      final characteristicArgs = characteristic.toArgs(descriptorsArgs);
+      characteristicsArgs.add(characteristicArgs);
+      characteristics[characteristicArgs.hashCodeArgs] = characteristic;
+    }
+    final serviceArgs = service.toArgs(characteristicsArgs);
+    logger.info('addService: $serviceArgs');
     await _api.addService(serviceArgs);
-    _characteristics[hashCodeArgs] = {
+    _characteristics[serviceArgs.hashCodeArgs] = characteristics;
-      for (var characteristics in service.characteristics)
+    _descriptors[serviceArgs.hashCodeArgs] = descriptors;
-        characteristics.hashCode: characteristics
-    };
   }
 
   @override
@@ -91,6 +120,7 @@ class MyPeripheralManager extends PeripheralManager
     logger.info('removeService: $hashCodeArgs');
     await _api.removeService(hashCodeArgs);
     _characteristics.remove(hashCodeArgs);
+    _descriptors.remove(hashCodeArgs);
   }
 
   @override
@@ -98,6 +128,7 @@ class MyPeripheralManager extends PeripheralManager
     logger.info('clearServices');
     await _api.clearServices();
     _characteristics.clear();
+    _descriptors.clear();
   }
 
   @override
@@ -241,11 +272,11 @@ class MyPeripheralManager extends PeripheralManager
     int idArgs,
     int offsetArgs,
     Uint8List valueArgs,
-    bool preparedWrite,
+    bool preparedWriteArgs,
-    bool responseNeeded,
+    bool responseNeededArgs,
   ) async {
     logger.info(
-        'onCharacteristicWriteRequest: $addressArgs.$hashCodeArgs - $idArgs, $offsetArgs, $valueArgs, $preparedWrite, $responseNeeded');
+        'onCharacteristicWriteRequest: $addressArgs.$hashCodeArgs - $idArgs, $offsetArgs, $valueArgs, $preparedWriteArgs, $responseNeededArgs');
     final central = _centrals[addressArgs];
     if (central == null) {
       return;
@@ -255,7 +286,7 @@ class MyPeripheralManager extends PeripheralManager
       return;
     }
     final MyGattStatusArgs statusArgs;
-    if (preparedWrite) {
+    if (preparedWriteArgs) {
       final preparedCharacteristic = _preparedCharacteristics[addressArgs];
       if (preparedCharacteristic != null &&
           preparedCharacteristic != characteristic) {
@@ -276,7 +307,7 @@ class MyPeripheralManager extends PeripheralManager
       _onCharacteristicWritten(central, characteristic, value);
       statusArgs = MyGattStatusArgs.success;
     }
-    if (responseNeeded) {
+    if (responseNeededArgs) {
       await _trySendResponse(
         addressArgs,
         idArgs,
@@ -287,29 +318,6 @@ class MyPeripheralManager extends PeripheralManager
     }
   }
 
-  @override
-  void onExecuteWrite(String addressArgs, int idArgs, bool executeArgs) async {
-    logger.info('onExecuteWrite: $addressArgs - $idArgs, $executeArgs');
-    final central = _centrals[addressArgs];
-    final characteristic = _preparedCharacteristics.remove(addressArgs);
-    final elements = _preparedValue.remove(addressArgs);
-    if (central == null || characteristic == null || elements == null) {
-      return;
-    }
-    final value = Uint8List.fromList(elements);
-    final execute = executeArgs;
-    if (execute) {
-      _onCharacteristicWritten(central, characteristic, value);
-    }
-    await _trySendResponse(
-      addressArgs,
-      idArgs,
-      MyGattStatusArgs.success,
-      0,
-      null,
-    );
-  }
-
   @override
   void onCharacteristicNotifyStateChanged(
     String addressArgs,
@@ -344,12 +352,130 @@ class MyPeripheralManager extends PeripheralManager
     _characteristicNotifyStateChangedController.add(eventArgs);
   }
 
+  @override
+  void onDescriptorReadRequest(
+    String addressArgs,
+    int hashCodeArgs,
+    int idArgs,
+    int offsetArgs,
+  ) async {
+    logger.info(
+        'onDescriptorReadRequest: $addressArgs.$hashCodeArgs - $idArgs, $offsetArgs');
+    final central = _centrals[addressArgs];
+    if (central == null) {
+      return;
+    }
+    final descriptor = _retrieveDescriptor(hashCodeArgs);
+    if (descriptor == null) {
+      return;
+    }
+    const statusArgs = MyGattStatusArgs.success;
+    final offset = offsetArgs;
+    final valueArgs = descriptor.value.sublist(offset);
+    await _trySendResponse(
+      addressArgs,
+      idArgs,
+      statusArgs,
+      offsetArgs,
+      valueArgs,
+    );
+  }
+
+  @override
+  void onDescriptorWriteRequest(
+    String addressArgs,
+    int hashCodeArgs,
+    int idArgs,
+    int offsetArgs,
+    Uint8List valueArgs,
+    bool preparedWriteArgs,
+    bool responseNeededArgs,
+  ) async {
+    logger.info(
+        'onDescriptorWriteRequest: $addressArgs.$hashCodeArgs - $idArgs, $offsetArgs, $valueArgs, $preparedWriteArgs, $responseNeededArgs');
+    final central = _centrals[addressArgs];
+    if (central == null) {
+      return;
+    }
+    final descriptor = _retrieveDescriptor(hashCodeArgs);
+    if (descriptor == null) {
+      return;
+    }
+    final MyGattStatusArgs statusArgs;
+    if (preparedWriteArgs) {
+      final preparedDescriptor = _preparedCharacteristics[addressArgs];
+      if (preparedDescriptor != null && preparedDescriptor != descriptor) {
+        statusArgs = MyGattStatusArgs.connectionCongested;
+      } else {
+        final preparedValueArgs = _preparedValue[addressArgs];
+        if (preparedValueArgs == null) {
+          _preparedDescriptors[addressArgs] = descriptor;
+          // Change the immutable Uint8List to mutable.
+          _preparedValue[addressArgs] = [...valueArgs];
+        } else {
+          preparedValueArgs.insertAll(offsetArgs, valueArgs);
+        }
+        statusArgs = MyGattStatusArgs.success;
+      }
+    } else {
+      descriptor.value = valueArgs;
+      statusArgs = MyGattStatusArgs.success;
+    }
+    if (responseNeededArgs) {
+      await _trySendResponse(
+        addressArgs,
+        idArgs,
+        statusArgs,
+        offsetArgs,
+        null,
+      );
+    }
+  }
+
+  @override
+  void onExecuteWrite(String addressArgs, int idArgs, bool executeArgs) async {
+    logger.info('onExecuteWrite: $addressArgs - $idArgs, $executeArgs');
+    final central = _centrals[addressArgs];
+    final characteristic = _preparedCharacteristics.remove(addressArgs);
+    final descriptor = _preparedDescriptors.remove(addressArgs);
+    final elements = _preparedValue.remove(addressArgs);
+    if (central == null || elements == null) {
+      return;
+    }
+    final value = Uint8List.fromList(elements);
+    final execute = executeArgs;
+    if (execute) {
+      if (characteristic == null && descriptor == null) {
+        return;
+      }
+      if (characteristic != null) {
+        _onCharacteristicWritten(central, characteristic, value);
+      }
+      if (descriptor != null) {
+        descriptor.value = value;
+      }
+    }
+    await _trySendResponse(
+      addressArgs,
+      idArgs,
+      MyGattStatusArgs.success,
+      0,
+      null,
+    );
+  }
+
   MyGattCharacteristic? _retrieveCharacteristic(int hashCodeArgs) {
     final characteristics = _characteristics.values
         .reduce((value, element) => value..addAll(element));
     return characteristics[hashCodeArgs];
   }
 
+  MyGattDescriptor? _retrieveDescriptor(int hashCodeArgs) {
+    final descriptors =
+        _descriptors.values.reduce((value, element) => value..addAll(element));
+    return descriptors[hashCodeArgs];
+  }
+
   bool? _retrieveConfirm(String addressArgs, int hashCodeArgs) {
     final confirms = _confirms[addressArgs];
     if (confirms == null) {
@@ -402,7 +528,8 @@ class MyPeripheralManager extends PeripheralManager
     MyGattCharacteristic characteristic,
     Uint8List value,
   ) async {
-    final trimmedValue = value.trimGATT();
+    characteristic.value = value;
+    final trimmedValue = characteristic.value;
     final eventArgs = GattCharacteristicWrittenEventArgs(
       central,
       characteristic,

bluetooth_low_energy_android/my_api.dart

@@ -230,14 +230,29 @@ abstract class MyPeripheralManagerFlutterApi {
     bool preparedWriteArgs,
     bool responseNeededArgs,
   );
-  void onExecuteWrite(
-    String addressArgs,
-    int idArgs,
-    bool executeArgs,
-  );
   void onCharacteristicNotifyStateChanged(
     String addressArgs,
     int hashCodeArgs,
     int stateNumberArgs,
   );
+  void onDescriptorReadRequest(
+    String addressArgs,
+    int hashCodeArgs,
+    int idArgs,
+    int offsetArgs,
+  );
+  void onDescriptorWriteRequest(
+    String addressArgs,
+    int hashCodeArgs,
+    int idArgs,
+    int offsetArgs,
+    Uint8List valueArgs,
+    bool preparedWriteArgs,
+    bool responseNeededArgs,
+  );
+  void onExecuteWrite(
+    String addressArgs,
+    int idArgs,
+    bool executeArgs,
+  );
 }

bluetooth_low_energy_android/pubspec.yaml

@@ -1,16 +1,16 @@
 name: bluetooth_low_energy_android
 description: Android implementation of the bluetooth_low_energy plugin.
-version: 5.0.2
+version: 5.0.4
 homepage: https://github.com/yanshouwang/bluetooth_low_energy
 
 environment:
   sdk: ">=3.0.0 <4.0.0"
-  flutter: ">=3.3.0"
+  flutter: ">=3.0.0"
 
 dependencies:
   flutter:
     sdk: flutter
-  bluetooth_low_energy_platform_interface: ^5.0.0
+  bluetooth_low_energy_platform_interface: ^5.0.2
 
 dev_dependencies:
   flutter_test:

bluetooth_low_energy_darwin/CHANGELOG.md

@@ -1,3 +1,12 @@
+## 5.0.5
+
+* Change flutter minimum version to 3.0.0.
+
+## 5.0.4
+
+* Update characteristic's value when write by centrals.
+* Implements new Api.
+
 ## 5.0.3
 
 * Fix issues caused by CoW.

bluetooth_low_energy_darwin/example/lib/main.dart

@@ -993,32 +993,32 @@ class _AdvertiserViewState extends State<AdvertiserView>
             GattCharacteristicProperty.write,
             GattCharacteristicProperty.writeWithoutResponse,
           ],
-          value: Uint8List.fromList([]),
           descriptors: [],
         ),
         GattCharacteristic(
           uuid: UUID.short(202),
           properties: [
             GattCharacteristicProperty.notify,
-            GattCharacteristicProperty.indicate,
           ],
-          value: Uint8List.fromList([]),
           descriptors: [],
         ),
         GattCharacteristic(
           uuid: UUID.short(203),
           properties: [
-            GattCharacteristicProperty.notify,
+            GattCharacteristicProperty.indicate,
           ],
-          value: Uint8List.fromList([]),
           descriptors: [],
         ),
         GattCharacteristic(
           uuid: UUID.short(204),
           properties: [
+            GattCharacteristicProperty.read,
+            GattCharacteristicProperty.write,
+            GattCharacteristicProperty.writeWithoutResponse,
+            GattCharacteristicProperty.notify,
             GattCharacteristicProperty.indicate,
           ],
-          value: Uint8List.fromList([]),
+          value: value,
           descriptors: [],
         ),
       ],

bluetooth_low_energy_darwin/example/pubspec.lock

@@ -15,15 +15,15 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "5.0.3"
+    version: "5.0.5"
   bluetooth_low_energy_platform_interface:
     dependency: "direct main"
     description:
       name: bluetooth_low_energy_platform_interface
-      sha256: "54f92ab2d7746fb6f2b4a40a48cd7eb8e3bf772f3ee89e1979d4d7b741fb2a05"
+      sha256: "5af74eb8f97a896dfdbcff2da284d4fe5b4e2e49ebb2f46f826ac1810f66e4d7"
       url: "https://pub.dev"
     source: hosted
-    version: "5.0.0"
+    version: "5.0.2"
   boolean_selector:
     dependency: transitive
     description:
@@ -312,4 +312,4 @@ packages:
     version: "3.0.2"
 sdks:
   dart: ">=3.2.0-194.0.dev <4.0.0"
-  flutter: ">=3.3.0"
+  flutter: ">=3.0.0"

bluetooth_low_energy_darwin/lib/src/my_api.dart

@@ -203,17 +203,13 @@ extension MyGattDescriptorX on MyGattDescriptor {
 }
 
 extension MyGattCharacteristicX on MyGattCharacteristic {
-  MyGattCharacteristicArgs toArgs() {
+  MyGattCharacteristicArgs toArgs(List<MyGattDescriptorArgs> descriptorsArgs) {
     final hashCodeArgs = hashCode;
     final uuidArgs = uuid.toArgs();
     final propertyNumbersArgs = properties.map((property) {
       final propertyArgs = property.toArgs();
       return propertyArgs.index;
     }).toList();
-    final descriptorsArgs = descriptors
-        .cast<MyGattDescriptor>()
-        .map((descriptor) => descriptor.toArgs())
-        .toList();
     return MyGattCharacteristicArgs(
       hashCodeArgs: hashCodeArgs,
       uuidArgs: uuidArgs,
@@ -224,13 +220,9 @@ extension MyGattCharacteristicX on MyGattCharacteristic {
 }
 
 extension MyGattServiceX on MyGattService {
-  MyGattServiceArgs toArgs() {
+  MyGattServiceArgs toArgs(List<MyGattCharacteristicArgs> characteristicsArgs) {
     final hashCodeArgs = hashCode;
     final uuidArgs = uuid.toArgs();
-    final characteristicsArgs = characteristics
-        .cast<MyGattCharacteristic>()
-        .map((characteristic) => characteristic.toArgs())
-        .toList();
     return MyGattServiceArgs(
       hashCodeArgs: hashCodeArgs,
       uuidArgs: uuidArgs,

bluetooth_low_energy_darwin/lib/src/my_peripheral_manager.dart

@@ -65,14 +65,22 @@ class MyPeripheralManager extends PeripheralManager
     if (service is! MyGattService) {
       throw TypeError();
     }
-    final serviceArgs = service.toArgs();
+    final characteristics = <int, MyGattCharacteristic>{};
-    final hashCodeArgs = serviceArgs.hashCodeArgs;
+    final characteristicsArgs = <MyGattCharacteristicArgs>[];
-    logger.info('addService: $hashCodeArgs');
+    for (var characteristic in service.characteristics) {
+      final descriptorsArgs = <MyGattDescriptorArgs>[];
+      for (var descriptor in characteristic.descriptors) {
+        final descriptorArgs = descriptor.toArgs();
+        descriptorsArgs.add(descriptorArgs);
+      }
+      final characteristicArgs = characteristic.toArgs(descriptorsArgs);
+      characteristicsArgs.add(characteristicArgs);
+      characteristics[characteristicArgs.hashCodeArgs] = characteristic;
+    }
+    final serviceArgs = service.toArgs(characteristicsArgs);
+    logger.info('addService: $serviceArgs');
     await _api.addService(serviceArgs);
-    _characteristics[hashCodeArgs] = {
+    _characteristics[serviceArgs.hashCodeArgs] = characteristics;
-      for (var characteristics in service.characteristics)
-        characteristics.hashCode: characteristics
-    };
   }
 
   @override
@@ -304,7 +312,8 @@ class MyPeripheralManager extends PeripheralManager
     MyGattCharacteristic characteristic,
     Uint8List value,
   ) async {
-    final trimmedValue = value.trimGATT();
+    characteristic.value = value;
+    final trimmedValue = characteristic.value;
     final eventArgs = GattCharacteristicWrittenEventArgs(
       central,
       characteristic,

bluetooth_low_energy_darwin/pubspec.yaml

@@ -1,16 +1,16 @@
 name: bluetooth_low_energy_darwin
 description: iOS and macOS implementation of the bluetooth_low_energy plugin.
-version: 5.0.3
+version: 5.0.5
 homepage: https://github.com/yanshouwang/bluetooth_low_energy
 
 environment:
   sdk: ">=3.0.0 <4.0.0"
-  flutter: ">=3.3.0"
+  flutter: ">=3.0.0"
 
 dependencies:
   flutter:
     sdk: flutter
-  bluetooth_low_energy_platform_interface: ^5.0.0
+  bluetooth_low_energy_platform_interface: ^5.0.2
 
 dev_dependencies:
   flutter_test:

bluetooth_low_energy_linux/CHANGELOG.md

@@ -1,3 +1,11 @@
+## 5.0.2
+
+* Change flutter minimum version to 3.0.0.
+
+## 5.0.1
+
+* Implements new Api.
+
 ## 5.0.0
 
 * Now `CentralManager#writeCharacteristic` will fragment the value automatically, the maximum write length is 512 bytes.

bluetooth_low_energy_linux/example/pubspec.lock

@@ -23,15 +23,15 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "5.0.0"
+    version: "5.0.2"
   bluetooth_low_energy_platform_interface:
     dependency: "direct main"
     description:
       name: bluetooth_low_energy_platform_interface
-      sha256: "54f92ab2d7746fb6f2b4a40a48cd7eb8e3bf772f3ee89e1979d4d7b741fb2a05"
+      sha256: "5af74eb8f97a896dfdbcff2da284d4fe5b4e2e49ebb2f46f826ac1810f66e4d7"
       url: "https://pub.dev"
     source: hosted
-    version: "5.0.0"
+    version: "5.0.2"
   bluez:
     dependency: transitive
     description:
@@ -360,4 +360,4 @@ packages:
     version: "6.5.0"
 sdks:
   dart: ">=3.2.0 <4.0.0"
-  flutter: ">=3.3.0"
+  flutter: ">=3.0.0"

bluetooth_low_energy_linux/pubspec.yaml

@@ -1,16 +1,16 @@
 name: bluetooth_low_energy_linux
 description: Linux implementation of the bluetooth_low_energy plugin.
-version: 5.0.0
+version: 5.0.2
 homepage: https://github.com/yanshouwang/bluetooth_low_energy
 
 environment:
   sdk: ">=3.0.0 <4.0.0"
-  flutter: ">=3.3.0"
+  flutter: ">=3.0.0"
 
 dependencies:
   flutter:
     sdk: flutter
-  bluetooth_low_energy_platform_interface: ^5.0.0
+  bluetooth_low_energy_platform_interface: ^5.0.2
   bluez: ^0.8.1
 
 dev_dependencies:

bluetooth_low_energy_platform_interface/CHANGELOG.md

@@ -1,3 +1,12 @@
+## 5.0.2
+
+* Revert GATT characteristic's `descriptors` arguments to required.
+
+## 5.0.1
+
+* Change GATT characteristic and descriptor's `value` arguments to optional.
+* Change GATT characteristic's `descriptors` arguments to optional.
+
 ## 5.0.0
 
 * Now `CentralManager#writeCharacteristic` and `PeripheralManager#writeCharacteristic` will fragment the value automatically, the maximum write length is 512 bytes.

bluetooth_low_energy_platform_interface/lib/src/gatt_characteristic.dart

@@ -19,7 +19,7 @@ abstract class GattCharacteristic extends GattAttribute {
   factory GattCharacteristic({
     required UUID uuid,
     required List<GattCharacteristicProperty> properties,
-    required Uint8List value,
+    Uint8List? value,
     required List<GattDescriptor> descriptors,
   }) =>
       MyGattCharacteristic(

bluetooth_low_energy_platform_interface/lib/src/gatt_descriptor.dart

@@ -9,7 +9,7 @@ abstract class GattDescriptor extends GattAttribute {
   /// Constructs a [GattDescriptor].
   factory GattDescriptor({
     required UUID uuid,
-    required Uint8List value,
+    Uint8List? value,
   }) =>
       MyGattDescriptor(
         uuid: uuid,

bluetooth_low_energy_platform_interface/lib/src/my_gatt_characteristic.dart

@@ -7,9 +7,9 @@ import 'my_gatt_descriptor.dart';
 
 class MyGattCharacteristic extends MyGattAttribute
     implements GattCharacteristic {
+  Uint8List _value;
   @override
   final List<GattCharacteristicProperty> properties;
-  Uint8List? _value;
   @override
   final List<MyGattDescriptor> descriptors;
 
@@ -18,9 +18,9 @@ class MyGattCharacteristic extends MyGattAttribute
     required this.properties,
     Uint8List? value,
     required this.descriptors,
-  }) : _value = value?.trimGATT();
+  }) : _value = value?.trimGATT() ?? Uint8List(0);
 
-  Uint8List get value => _value ?? Uint8List.fromList([]);
+  Uint8List get value => _value;
   set value(Uint8List value) {
     _value = value.trimGATT();
   }

bluetooth_low_energy_platform_interface/lib/src/my_gatt_descriptor.dart

@@ -4,14 +4,14 @@ import 'gatt_descriptor.dart';
 import 'my_gatt_attribute.dart';
 
 class MyGattDescriptor extends MyGattAttribute implements GattDescriptor {
-  Uint8List? _value;
+  Uint8List _value;
 
   MyGattDescriptor({
     required super.uuid,
     Uint8List? value,
-  }) : _value = value?.trimGATT();
+  }) : _value = value?.trimGATT() ?? Uint8List(0);
 
-  Uint8List get value => _value ?? Uint8List.fromList([]);
+  Uint8List get value => _value;
   set value(Uint8List value) {
     _value = value.trimGATT();
   }

bluetooth_low_energy_platform_interface/pubspec.yaml

@@ -1,11 +1,11 @@
 name: bluetooth_low_energy_platform_interface
 description: A common platform interface for the bluetooth_low_energy plugin.
-version: 5.0.0
+version: 5.0.2
 homepage: https://github.com/yanshouwang/bluetooth_low_energy
 
 environment:
   sdk: '>=3.0.0 <4.0.0'
-  flutter: ">=3.3.0"
+  flutter: ">=3.0.0"
 
 dependencies:
   flutter:

bluetooth_low_energy_windows/CHANGELOG.md

@@ -1,3 +1,11 @@
+## 5.0.3
+
+* Change flutter minimum version to 3.0.0.
+
+## 5.0.2
+
+* Implements new Api.
+
 ## 5.0.1
 
 * Fix the [`CentralManager#discoverGATT`, `CentralManager#readCharacteristic` and `CentralManager#readDescriptor` issue](https://github.com/yanshouwang/bluetooth_low_energy/issues/42) caused by cache mode.

bluetooth_low_energy_windows/example/pubspec.lock

@@ -13,17 +13,17 @@ packages:
     dependency: "direct main"
     description:
       name: bluetooth_low_energy_platform_interface
-      sha256: "54f92ab2d7746fb6f2b4a40a48cd7eb8e3bf772f3ee89e1979d4d7b741fb2a05"
+      sha256: "5af74eb8f97a896dfdbcff2da284d4fe5b4e2e49ebb2f46f826ac1810f66e4d7"
       url: "https://pub.dev"
     source: hosted
-    version: "5.0.0"
+    version: "5.0.2"
   bluetooth_low_energy_windows:
     dependency: "direct main"
     description:
       path: ".."
       relative: true
     source: path
-    version: "5.0.1"
+    version: "5.0.3"
   boolean_selector:
     dependency: transitive
     description:
@@ -312,4 +312,4 @@ packages:
     version: "3.0.2"
 sdks:
   dart: ">=3.2.0-194.0.dev <4.0.0"
-  flutter: ">=3.3.0"
+  flutter: ">=3.0.0"

bluetooth_low_energy_windows/pubspec.yaml

@@ -1,16 +1,16 @@
 name: bluetooth_low_energy_windows
 description: Windows implementation of the bluetooth_low_energy plugin.
-version: 5.0.1
+version: 5.0.3
 homepage: https://github.com/yanshouwang/bluetooth_low_energy
 
 environment:
   sdk: ">=3.0.0 <4.0.0"
-  flutter: ">=3.3.0"
+  flutter: ">=3.0.0"
 
 dependencies:
   flutter:
     sdk: flutter
-  bluetooth_low_energy_platform_interface: ^5.0.0
+  bluetooth_low_energy_platform_interface: ^5.0.2
 
 dev_dependencies:
   flutter_test: