write method

Future<Null> write(List<int> value)

Writes the value of a descriptor

Implementation

Future<Null> write(List<int> value) async {
  var request = protos.WriteDescriptorRequest.create()
    ..remoteId = deviceId.toString()
    ..descriptorUuid = uuid.toString()
    ..characteristicUuid = characteristicUuid.toString()
    ..serviceUuid = serviceUuid.toString()
    ..value = value;

  await FlutterBlue.instance._channel
      .invokeMethod('writeDescriptor', request.writeToBuffer());

  return FlutterBlue.instance._methodStream
      .where((m) => m.method == "WriteDescriptorResponse")
      .map((m) => m.arguments)
      .map((buffer) => new protos.WriteDescriptorResponse.fromBuffer(buffer))
      .where((p) =>
          (p.request.remoteId == request.remoteId) &&
          (p.request.descriptorUuid == request.descriptorUuid) &&
          (p.request.characteristicUuid == request.characteristicUuid) &&
          (p.request.serviceUuid == request.serviceUuid))
      .first
      .then((w) => w.success)
      .then((success) => (!success)
          ? throw new Exception('Failed to write the descriptor')
          : null)
      .then((_) => _value.add(value))
      .then((_) => null);
}