device => {

        if (device.rssi <= -95) {
          this.vibrationThreshold += 1;
          device.distance = "far";
        } else if (device.rssi > -95 && device.rssi <= -80) {
          this.vibrationThreshold += 1;
          device.distance = "not so close";
        } else if (device.rssi > -80) {
          this.vibrationThreshold = 0;
          device.distance = "close";
        }

        if (this.vibrationThreshold >= 3) {
          console.log("Attempting to vibrate...");
          Vibration.vibrate(2000);
        }

        this.foundDevices.push(device);
        console.log("Found: " + JSON.stringify(device));

        // It seems I need to use the ChangeDetectorRef to get the UI to update whenever a device is detected
        this.cd.detectChanges();

      },

	hold() {
		try {
			if (this.vibration) {
				Vibration.vibrate(20);
			}
		} catch (error) {
			console.error('hold', error);
		}
	}

    saveNotebook() {
        console.log(JSON.stringify(this.notebook));
        this.dataService.saveNotebook(this.notebook);
        Vibration.vibrate(1000);//vibrate a second
        console.log("Notebook saved successfully");
        
        this.events.publish('notebooks:refresh', "");

        this.nav.pop();
    }

    /* Connect to the given device, and set the peripheral for later */
    connect(peripheral) {
	Vibration.vibrate(100);
	let connectSub = BLE.connect(peripheral.id).subscribe(result => {
	    this.storage.storePeripheral(peripheral.id);
	    this.peripheral = peripheral;
            this.connected(peripheral);
        }, error => {
	    console.log("Peripheral was disconnected.");
	    this.disconnect();
	});
    }

 vibrate() {
   Vibration.vibrate(3000);
 }

 vibrate() {
     Vibration.vibrate(1000);
 }

 platform.ready().then(() => {
   this.voice.start();
   Vibration.vibrate(500);
 });