cordova plugin add https://github.com/randdusing/BluetoothLE

var params = {
  request: true,
  time : 10000 //in milliseconds, time to scan defaults to 5000ms if not provided
};
$cordovaBluetoothle.startScan(params).then(function(success) {
	console.log(device.name);
	console.log(device.address);
});

var params = {
  request: true, //ask user to enable bluetooth
  name: 'Jewelbot' //device name to look for
};


$ionicPlatform.ready()
        .then(function () {
          return $cordovaBluetoothle.initialize(params)
            .then(function () {
              //successfully initialized
              return $cordovaBluetoothle.find(params);
            }, function (err) {
              //error trying to initialiez
            });
        })
        .then(function (data) {
          // Scanning for specific device
          if (data.status === 'scanResult') {
            $scope.model.status = 'Found device: ' + data.name;
            $scope.model.devices.push(data);
            return $cordovaBluetoothle.stopScan();
          }
        }, function (error) {
          $scope.model.status = 'Error while scanning.' + JSON.stringify(error);
          return $cordovaBluetoothle.stopScan();
        }, function (notify) {
          // found other devices; but not the device you're looking
        })
        .then(function () {
          $scope.model.status = 'ending scan...';
          return $cordovaBluetoothle.isScanning().then(function(isScanning) {
            $scope.model.status = isScanning ? 'Scan Not Ended' : 'Scan Ended';
            if (isScanning) {
              return $cordovaBluetoothle.stopScan();
            }
          });
        });

.controller("ExampleController", ['$cordovaBluetoothle', '$ionicPlatform', '$scope', function($cordovaBluetoothle,$ionicPlatform, $scope ) {
    
    $ionicPlatform.ready()
          .then(function () {
            return $cordovaBluetoothle.connect({address: $scope.model.address})
              .then( function (success) {
                //successfully paired
              })
              .error(function (err) {
                //error while pairing, return promise that invokes disconnect.
                return $cordovaBluetoothle.disconnect(address);
              })
              .notify(function (notify) {
                //still trying to connect. 
              });
          });

 

$cordovaBluetoothle.initalize() //ios
$cordovaBluetoothle.enable() //android
$cordovaBluetoothle.disable() //android
$cordovaBluetoothle.startScan()
$cordovaBluetoothle.stopScan()
$cordovaBluetoothle.retrieveConnected()
$cordovaBluetoothle.connect()
$cordovaBluetoothle.disconnect()
$cordovaBluetoothle.reconnect()
$cordovaBluetoothle.close() // android
$cordovaBluetoothle.discover() //android
$cordovaBluetoothle.characteristics() 
$cordovaBluetoothle.descriptors() 
$cordovaBluetoothle.read() 
$cordovaBluetoothle.subscribe() 
$cordovaBluetoothle.unsubscribe() 
$cordovaBluetoothle.write()

$cordovaBluetoothle.readDescriptor()
$cordovaBluetoothle.writeDescriptor()
$cordovaBluetoothle.rssi()
$cordovaBluetoothle.isInitialized()
$cordovaBluetoothle.isEnabled()
$cordovaBluetoothle.isScanning()
$cordovaBluetoothle.isConnected()
$cordovaBluetoothle.isDiscovered()
$cordovaBluetoothle.find()