GPS Module for Raspberry Pi 3 on Windows 10 IoT Core

/* The MIT License (MIT)
 * MainPage.xaml.cs
 * Copyright (c) 2016 Gilang M. Hamidy (gilang.hamidy@gmail.com)
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

using System;
using System.Text;
using System.Threading.Tasks;
using Windows.Devices.Enumeration;
using Windows.Devices.SerialCommunication;
using Windows.Foundation;
using Windows.Storage.Streams;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Maps;



// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409

namespace Heliosky.IoT.GPS.SampleApp
{
  /// <summary>
  /// An empty page that can be used on its own or navigated to within a Frame.
  /// </summary>
  public sealed partial class MainPage : Page
  {
    private UBXSerialGPS gps;
    private MapIcon myLocation;
    private RandomAccessStreamReference mapIconStreamReference;

    public MainPage()
    {
      this.InitializeComponent();
      mapIconStreamReference = RandomAccessStreamReference.CreateFromUri(new Uri("ms-appx:///Assets/MapPin.png"));
    }

    private async void Page_Loaded(object sender, RoutedEventArgs e)
    {
      // Get serial device
      string aqs = SerialDevice.GetDeviceSelector();
      var dis = await DeviceInformation.FindAllAsync(aqs);

      // Create configuration object
      Configuration.Port cfg_prt = new Configuration.Port()
      {
        PortID = 1,
        StopBit = Configuration.Port.StopBitType.OneStop,
        Parity = Configuration.Port.ParityType.NoParity,
        CharacterLength = Configuration.Port.CharacterLengthType.Bit8,
        BaudRate = 115200,
        InputProtocol = Configuration.Port.Protocol.UBX,
        OutputProtocol = Configuration.Port.Protocol.UBX
      };
  
      // Instantiate UBXSerialGPS
      gps = new UBXSerialGPS(dis[0], cfg_prt);
              
      // Register event handler for periodic data
      gps.MessageReceived += Gps_MessageReceived;
      statusTextBox.Text = "GPS Started";
              
      // Start the GPS
      await gps.Start();
  
      // When the code reach here, the GPS is up and running
      statusTextBox.Text = "GPS init completed";
  
      // Configure GPS to send geoposition data periodically
      Configuration.Message cfg_msg = Configuration.Message.GetConfigurationForType<Navigation.GeodeticPosition>();
  
      // Write the config to GPS
      bool res = await gps.WriteConfigAsync(cfg_msg);
  
      if(res)
      {
        statusTextBox.Text = "Success configuring message";
        await Task.Delay(5000);
      }
      else
      {
        statusTextBox.Text = "Failed configuring message";
        await Task.Delay(5000);
      }
  
      statusTextBox.Text = "Polling message Monitor Receiver Status";
              
      // Poll a data of specified type from the GPS module
      Navigation.Clock resp = await gps.PollMessageAsync<Navigation.Clock>();
  
      if(resp != null)
      {
        statusTextBox.Text = "Poll message success: " + resp.TimeMillisOfWeek;
      }
      else
      {
        statusTextBox.Text = "Poll message failed";
      }
    }
  
    private void Gps_MessageReceived(object sender, MessageReceivedEventArgs e)
    {
      // Message is received, try to cast to our desired data
      Navigation.GeodeticPosition pos = e.ReceivedMessage as Navigation.GeodeticPosition;
  
      // If it is correct casting, process data
      if(pos != null)
      {
        statusTextBox.Text = "GPS Data Received at " + DateTime.Now.ToString();
  
        StringBuilder bldr = new StringBuilder();
        bldr.AppendLine("GPS Information");
        bldr.AppendLine("Latitude: " + pos.Latitude);
        bldr.AppendLine("Longitude: " + pos.Longitude);
        bldr.AppendLine("Time: " + pos.TimeMillisOfWeek);
        bldr.AppendLine("MSL: " + pos.HeightAboveSeaLevel);
  
        contentTextBox.Text = bldr.ToString();
  
        if(myLocation == null)
        {
          mapView.Center = new Windows.Devices.Geolocation.Geopoint(pos.GetGeoposition());
          mapView.ZoomLevel = 18;
  
          myLocation = new MapIcon();
          myLocation.Location = mapView.Center;
          myLocation.NormalizedAnchorPoint = new Point(0.5, 1.0);
          myLocation.Image = mapIconStreamReference;
          myLocation.ZIndex = 0;
          mapView.MapElements.Add(myLocation);
        }
        else
        {
          myLocation.Location = new Windows.Devices.Geolocation.Geopoint(pos.GetGeoposition());
        }
      }
    }
  }
}