How to get list of devices and connect using BluetoothLE plugin in ionic 4?

'm using BluetoothLE plugin and I want to get a list of active Bluetooth devices and click to connect with the device using ionic 4

statusMessage: string;

constructor(public bluetoothle: BluetoothLE,
    public platform: Platform,
    private ngZone: NgZone,
    public toastController: ToastController) {
    this.platform.ready().then((readySource) => {

      console.log('Platform ready from', readySource);

      this.bluetoothle.initialize().subscribe(ble => {
        console.log('ble', ble.status) // logs 'enabled'
      });

    });
  }

  adapterInfo() {
    this.bluetoothle.getAdapterInfo().then((success) => {
      console.log("adapterInfo: " + success);
      this.setStatus(success.name);
    })
  }

  startScan() {
    let params = {
      "services": [
        "180D",
        "180F"
      ],
      "allowDuplicates": true,
    }
    this.bluetoothle.startScan(params).subscribe((success) => {
      console.log("startScan: " + success);
      this.setStatus(success.address);
    }, (error) => {
      console.log("error: " + error);
      this.scanError(error);
    })
  }

  stopScan() {
    this.bluetoothle.stopScan().then((resp) => {
      console.log("stopScan: " + resp);
      this.setStatus(resp.status);
    })
  }

  retrieveConnected() {
    let params = {
      "services": [
        "180D",
        "180F"
      ]
    }

    this.bluetoothle.retrieveConnected(params).then((resp) => {
      console.log("retrieveConnected: " + resp);
      this.setStatus("retrieveConnected");
    })
  }

  // If location permission is denied, you'll end up here
  async scanError(error: string) {
    this.setStatus('Error ' + error);
    const toast = await this.toastController.create({
      message: 'Error scanning for Bluetooth low energy devices',
      position: 'middle',
      duration: 5000
    });
    toast.present();
  }

  setStatus(message: string) {
    console.log("message: " + message);
    this.ngZone.run(() => {
      this.statusMessage = message;
    });
  }
<ion-header>
<ion-toolbar>
    <ion-title>
      Ionic Blank
    </ion-title>
  </ion-toolbar>
</ion-header>

<ion-content>
  <ion-button (click)="adapterInfo()">AdapterInfo</ion-button>
  <ion-button (click)="startScan()">StartScan</ion-button>
  <ion-button (click)="stopScan()">StopScan</ion-button>
  <ion-button (click)="retrieveConnected()">RetrieveConnected</ion-button>
</ion-content>

<ion-footer>
  <ion-toolbar>
    <p>{{ statusMessage }}</p>
  </ion-toolbar>
</ion-footer>

Please help

@gokujy have you found any solution for this? Please share. Thanks