private async void Page_Loaded(object sender, RoutedEventArgs e)
        {
            try
            {
                await CloudHelper.InitClientAsync(this);
            }
            catch (Exception ex)
            {
                string s = ex.Message;
            }

            SerialHelper serialHelper = new SerialHelper(this);

            // connect to arduino and start listening to data
            serialHelper.ConnectToArduino();
        }