扫描附近的设备，但device.name为空（react-native-ble-plx）

Question

使用react-native-ble-plx库，每当我扫描设备时，我都会获得MAC地址，该MAC地址在每次打开和关闭附近的设备时都会更改，因此，如果设备存在或不存在，我应该如何比较？诸如device.name，device.localName的字段为null。以下是我扫描附近设备的代码。

const App = () =>{
const DeviceManager = new BleManager();
const subscription = DeviceManager.onStateChange((state) =>{
if(state === 'PoweredOn'){
  console.log('I am powered On');
  scan();
  subscription.remove();
}
},true)

  const scan = () =>{
  DeviceManager.startDeviceScan([],null,(error,device)=>{
  console.log('Scanning');
  if(device === null){
    console.log(error);
  }
  if(device !== null){
    console.log('found devices');
    console.log(device.id);
    console.log(device.name);
  }
})
}