HarmonyOS 调用writeCharacteristicValue接口时报错 errCode: -10, errMessage: Inner error.

可能为创建参数中设置descriptors或characteristicValue参数值存在问题，写入特征值时可参考如下封装方式：

writeCharacteristicValue() {
  if (!this.gattServiceInfo) {
    this.characteristicValue = '';
    console.log('BluetoothPage bluetooth gattServiceInfo is undefined ');
    return
  }
  let services: ble.GattService = this.gattServiceInfo;

  let descriptors: Array<ble.BLEDescriptor> = [];
  let descriptor: ble.BLEDescriptor = {
    serviceUuid: services.serviceUuid,
    characteristicUuid: services.characteristics[0].characteristicUuid,
    descriptorUuid: services.characteristics[0].descriptors[0].descriptorUuid,
    descriptorValue: services.characteristics[0].descriptors[0].descriptorValue
  };
  descriptors[0] = descriptor;
  let value : string = ''
  let characteristic: ble.BLECharacteristic = {
    serviceUuid: services.serviceUuid,
    characteristicUuid: services.characteristics[0].characteristicUuid,
    characteristicValue: Utils.string2ArrayBuffer(this.cValue),
    descriptors: descriptors,
  };
  try {
    if (this.gattClient) {
      this.gattClient.writeCharacteristicValue(characteristic, ble.GattWriteType.WRITE);
      promptAction.showToast({
        message: '特征值写结束'
      })
      console.log('BluetoothPage writeCharacteristicValue finish');
    }
  } catch (err) {
    console.error('errCode: ' + (err as BusinessError).code + ', errMessage: ' + (err as BusinessError).message);
  }
}

string2ArrayBuffer(value: string) {
  let buf = buffer.from(value,'utf16le').buffer;
  return buf;
}
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.