HarmonyOS BLE写数据问题

// BLE 写入数据 
const array = [0x02, 0x02, 0x08, 0x00, 0x47, 0x4D, 0x22, 0x49]; 
// 将数组转换为ArrayBuffer 
const arrayBuffer = new Uint8Array(array).buffer; 
console.log('转换结果: ' + JSON.stringify(arrayBuffer.byteLength)); 
let characteristic: ble.BLECharacteristic = { 
  serviceUuid: gattService.serviceUuid, 
  characteristicUuid: bleCharacteristic.characteristicUuid, 
  characteristicValue: arrayBuffer 
  , 
  descriptors: [] 
}; 
this.mGattClientDevice.writeCharacteristicValue(characteristic, ble.GattWriteType.WRITE, (err, data) => { 
  console.log("写了什么" + ' ' + err.code + ', ' + JSON.stringify(data), JSON.stringify(characteristic)); 
});

7274 A03D00/JSAPP com.xxx...oductkit I 写了什么 2900007, null {"serviceUuid":"BE940000-73xxx3-xxx6-B7AE-68xxx22BD5","characteristicUuid":"BE9xxx001-7xxxx-BE46-B7AE-689E7xxx2BD5","characteristicValue":{},"descriptors":[]}