qnsdk

qnsdk is yolanda Company smart device communication plug-in.

Usage

To use this plugin, add qnsdk as a dependency in your pubspec.yaml file.

Getting Started

Xcode configuration
  • iOS10.0 and above must have Bluetooth instructions in Info.plist, otherwise the system's Bluetooth function cannot be used
  • iOS13.0 and above must be configured with the authorization instructions for Bluetooth in Info.plist, otherwise it will be found to crash.
  • There is a pair in the Info.plist privacy - bluetooth always usage description button.
Android
  • Support Android 4.3 system above
  • Using androidx libraries in your project
  • Android 6.0 above requires authorized location rights

Sample Usage

Initialising

 String configFileContent = await rootBundle.loadString('data/123456789.qn');
 qnApi.initSDK('123456789', configFileContent).then((result) => print('initSDK ${result.errorCode}'));

Set up listening

 qnApi.setBleStateListener(this);
 qnApi.setBleDeviceDiscoveryListener(this);
 qnApi.setBleConnectionChangeListener(this);
 qnApi.setScaleDataListener(this);

Start scanning

 qnApi.startBleDeviceDiscovery();

Connection

 qnApi.connectDevice(device,user);

Receive data

 @override
  void onGetUnsteadyWeight(QNBleDevice device, double weight) {
    unsteadyWeightStream.add(weight);
  }

  @override
  void onGetScaleData(QNBleDevice device, QNScaleData data) {
    scaleDataStream.add(data);
  }

  @override
  void onGetStoredScale(
      QNBleDevice device, List<QNScaleStoreData> storedDataList) {
    for (var item in storedDataList) {
      storedDataStream.add(item);
    }
  }

  @override
  void onScaleStateChange(QNBleDevice device, int scaleState) {
    deviceStateStream.add(scaleState);
  }

Libraries

QNConstants
qnsdk