Bluetooth Serial Ionic 2 - ionic-framework

Question

I am trying to build a simple bluetooth serial app to connect to my arduino. I am using ionic2 to make android app.right now, all I am trying to do is list all the availabe bluetooth devices. Below is my code :
import { Component } from '#angular/core';
import { BluetoothSerial } from 'ionic-native';
import { NavController } from 'ionic-angular';
#Component({
selector: 'page-home',
templateUrl: 'home.html'
})
export class HomePage {
public working:string;
public var2: string ;
bluetoothSerial.isEnabled(
function() {
this.working= "Bluetooth is enabled";
},
function() {
this.working="Bluetooth is *not* enabled";
}
);
public lists = [];
bluetoothSerial.discoverUnpaired(function(devices) {
this.lists.push(devices);
}, function(){ this.var2 = 'could not find any bluetooth device';});
constructor() { }
}
Whenever I do ionic serve I do plenty of error, mainly because Bluetooth is not recognized (function implementation is missing). It also does not allow me to build app either.
Please help on this.
Thank you so much

Answer 1

Looking at the docs
isEnabled()
Platforms: Android iOS Windows Phone
Reports if bluetooth is enabled
Returns: Promise returns a promise
Couple of things. You cannot call your method like that.
You should capitalize your BluetoothSerial
You should put it in a function
import { Component } from '#angular/core';
import { BluetoothSerial } from 'ionic-native';
import { NavController } from 'ionic-angular';
#Component({
selector: 'page-home',
templateUrl: 'home.html'
})
export class HomePage {
public working:string;
public var2: string ;
public lists = [];
constructor(){
this.getAlBluetoothDevices();
}
// put BluetoothSerial inside a function, can't be called different
getAllBluetoothDevices(){
// async so keep everything in this method
BluetoothSerial.isEnabled().then((data)=> {
// not sure of returning value, probably a boolean
console.log("dont know what it returns"+data);
// returns all the available devices, not just the unpaired ones
BluetoothSerial.list().then((allDevices) => {
// set the list to returned value
this.lists = allDevices;
if(!this.lists.length > 0){
this.var2 = "could not find any bluetooth devices";
}
});
});
}
}
}

Answer 2

The below code is for scanning the Bluetooth device
startScanning(){
this.isScanning =true;
this.bluetoothSerial.isEnabled().then(()=>{
this.bluetoothSerial.discoverUnpaired().then((allDevices)=>{
this.devices=allDevices;
this.isScanning =false;
});
});
And this code is for connecting to the device
onDeviceReady(){
let device = this.navParams.get('device');
this.bluetoothSerial.connect(device.id).subscribe((data)=>{
let alert = this.alertCtrl.create({
title: 'Bluetooth',
subTitle: data,
buttons: ['ok']
});
alert.present();
},error=>{
let alert = this.alertCtrl.create({
title: 'Bluetooth',
subTitle: error,
buttons: ['ok']
});
alert.present();
});
}
Note: It's working for me