Gatt Server 사용하기

장치가 주변 장치로 작동하려면 먼저 BluetoothGattServer를 열고

하나 이상의 BluetoothGattService 및 하나의 BluetoothGattCharacteristic로 채워야합니다.

BluetoothGattServer server=bluetoothManager.openGattServer(context, bluetoothGattServerCallback);

BluetoothGattService service = new BluetoothGattService(SERVICE_UUID, BluetoothGattService.SERVICE_TYPE_PRIMARY);

전체 쓰기, 읽기 및 알림 권한이있는 BluetoothGattCharacteristic의 예입니다.

필요에 따라이 특성을 부여하는 권한을 미세 조정할 수 있습니다.

BluetoothGattCharacteristic characteristic = new BluetoothGattCharacteristic(CHARACTERISTIC_UUID,
                    BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_WRITE |
                            BluetoothGattCharacteristic.PROPERTY_NOTIFY,
                    BluetoothGattCharacteristic.PERMISSION_READ | BluetoothGattCharacteristic.PERMISSION_WRITE);

characteristic.addDescriptor(new BluetoothGattDescriptor(UUID.fromString("00002902-0000-1000-8000-00805f9b34fb"), BluetoothGattCharacteristic.PERMISSION_WRITE));

service.addCharacteristic(characteristic);

server.addService(service);

BluetoothGattServerCallback은 BluetoothGattServer와 관련된 모든 이벤트를 수신합니다.

BluetoothGattServerCallback bluetoothGattServerCallback= new BluetoothGattServerCallback() {
  @Override
  public void onConnectionStateChange(BluetoothDevice device, int status, int newState) {
      super.onConnectionStateChange(device, status, newState);
  }

  @Override
  public void onCharacteristicReadRequest(BluetoothDevice device, int requestId, int offset, BluetoothGattCharacteristic characteristic) {
      super.onCharacteristicReadRequest(device, requestId, offset, characteristic);
  }

  @Override
  public void onCharacteristicWriteRequest(BluetoothDevice device, int requestId, BluetoothGattCharacteristic characteristic, boolean preparedWrite, boolean responseNeeded, int offset, byte[] value) {
      super.onCharacteristicWriteRequest(device, requestId, characteristic, preparedWrite, responseNeeded, offset, value);
  }

  @Override
  public void onDescriptorReadRequest(BluetoothDevice device, int requestId, int offset, BluetoothGattDescriptor descriptor) {
      super.onDescriptorReadRequest(device, requestId, offset, descriptor);
  }

  @Override
  public void onDescriptorWriteRequest(BluetoothDevice device, int requestId, BluetoothGattDescriptor descriptor, boolean preparedWrite, boolean responseNeeded, int offset, byte[] value) {
      super.onDescriptorWriteRequest(device, requestId, descriptor, preparedWrite, responseNeeded, offset, value);
  }

characteristic 또는 descriptor에 대한 쓰기 / 읽기 요청을받을 때마다 요청을 성공적으로 완료하려면 응답을 보내야합니다.

@Override
 public void onCharacteristicReadRequest(BluetoothDevice device, int requestId, int offset, BluetoothGattCharacteristic characteristic) {
    super.onCharacteristicReadRequest(device, requestId, offset, characteristic);
    server.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, offset, YOUR_RESPONSE);
}