private async Task connect(String id)
        {
            _obd = new ObdCommunication();
            _connectButton.Content = "Verbinde OBD...";
            disableUserInteraction();

            (App.Current as App).Obd = _obd;
            Boolean successfull = false;

            successfull = await(App.Current as App).Obd.establishConnection(id);

            if (successfull)
            {
                if (_autoconnect)
                {
                    ApplicationData.Current.LocalSettings.Values["bluetoothPeer"] = id;
                }
                else
                {
                    ApplicationData.Current.LocalSettings.Values.Remove("bluetoothPeer");
                }
                _bluetoothID = id;
                Frame.Navigate(typeof(TrackerPage), _routeName);
            }
            else //Fehler
            {
                ApplicationData.Current.LocalSettings.Values.Remove("bluetoothPeer");
                _connectButton.Content = "Verbindung aufbauen";
                enableUserInteraction();
                _connectButton.IsEnabled = true;
                var emailErrorDialog = new MessageDialog("Fehler beim Aufbau der OBD Verbindung. Adapter neustarten und erneut versuchen! ");
                emailErrorDialog.Commands.Add(new UICommand("ok"));
                await emailErrorDialog.ShowAsync();
            }
        }
        //----------------------init-functions-----------------------------------//


        private void initObd()
        {
            _obd = (App.Current as App).Obd;

            _obdThread = Windows.System.Threading.ThreadPool.RunAsync((source) =>
            {
                consumptionTracker();
            }, WorkItemPriority.High);
        }