HarmonyOS BLE 搜索、连接、断开等问题

this.mGattServer.notifyCharacteristicChanged(deviceId, notifyCharacteristic);// 特征值变化时，通知已连接的client设备
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this.mGattClientDevice.writeCharacteristicValue(characteristic, ble.GattWriteType.WRITE); 
// 订阅写特征值事件，特征值变化，通知gattClient 
this.mGattServer.on('characteristicWrite', (characteristicWriteReq) => { 
  let characteristicUuid = characteristicWriteReq.characteristicUuid; 
  let serviceUuid = characteristicWriteReq.serviceUuid; 
  let deviceId = characteristicWriteReq.deviceId; 
  let notifyCharacteristic: ble.NotifyCharacteristic = { 
    serviceUuid: serviceUuid, 
    characteristicUuid: characteristicUuid, 
    characteristicValue: this.string2ArrayBuffer('Value4notifyCharacteristic'), 
    confirm: false 
  } 
  // 特征值变化时，通知已连接的client设备 
  this.mGattServer.notifyCharacteristicChanged(deviceId, notifyCharacteristic); 
  console.info('GattServer notifyCharacteristicChanged success, deviceId = ' + deviceId); 
})
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