HarmonyOS鸿蒙Next中蓝牙订阅问题

HarmonyOS鸿蒙Next中蓝牙订阅问题

let descriptors: Array<BLEDescriptor> = [];
let arrayBuffer = new ArrayBuffer(8);
let descV = new Uint8Array(arrayBuffer);
descV[0] = 11;
let descriptor: BLEDescriptor = {
  serviceUuid: this.myServiceUuid,
  characteristicUuid: this.myCharacteristicUuid,
  descriptorUuid: this.myFirstDescriptorUuid,
  descriptorValue: arrayBuffer
};

descriptors[0] = descriptor;

let arrayBufferC = new ArrayBuffer(8);
let characteristic: BLECharacteristic = {
  serviceUuid: this.myServiceUuid,
  characteristicUuid: this.myCharacteristicUuid,
  characteristicValue: arrayBufferC,
  descriptors: descriptors
};

Logger.error(TAG, 'readCharacteristicValue' + JSON.stringify(characteristic));
try {
  this.gattClient?.setBLEMtuSize(247)
  this.gattClient?.setCharacteristicChangeNotification(characteristic, true, (err: BusinessError) => {
    if (err) {
      Logger.error('notifyCharacteristicChanged callback failed' + JSON.stringify(err));
    } else {
      Logger.error('notifyCharacteristicChanged callback successful' + JSON.stringify(err));
    }
  });

  this.gattClient?.on('BLECharacteristicChange', (characteristicChangeReq: BLECharacteristic) => {
    Logger.error(TAG + "readCharacteristicValue then = ", JSON.stringify(characteristicChangeReq));
  });

} catch (err) {
  Logger.error(TAG, 'errCode: ' + (err as BusinessError).code + ', errMessage: ' + (err as BusinessError).message);
}