4 replies to this topic

[miltonkbenjamin]

All,

 

Where can I get the C# class for accessing the GPS data (lat, lon, elev?) from an Adafruit Netduino GPS shield?

 

Thanks,

 

Milt

[KiwiDev]

Hi,

 

Have a look at the NetMF Toolbox GPS driver I have used it for a couple of projects

 

netmftoolbox.codeplex.com

 

Bryn

[miltonkbenjamin]

Bryn,

 

I copied the code into a MicroFramework  Microsoft C# 2010 project, see below, and it complained that namespace NmeaGps was not found.

Any Ideas?

 

Thanks,

Milt

 

"using System; using System.Threading; using Microsoft.SPOT; using Microsoft.SPOT.Hardware; using SecretLabs.NETMF.Hardware; using SecretLabs.NETMF.Hardware.Netduino; namespace NetduinoApplication1 {   public class Program {   public static NmeaGps Gps = new NmeaGps();   public static OutputPort Led = new OutputPort(Pins.ONBOARD_LED, false);   // ***********************************************************************   public static void Main() {   // Binds all events to the GPS device   Gps.GotFix += new NativeEventHandler(Gps_GotFix);   Gps.LostFix += new NativeEventHandler(Gps_LostFix);   Gps.PositionChanged += new NativeEventHandler(Gps_PositionChanged);   // Starts the GPS device   Debug.Print("Trying to get a fix...");   Gps.Start();   // Nice blinking LED effect when we have a fix   while (true) {   Led.Write(Gps.Fix);   Thread.Sleep(450);   Led.Write(!Gps.Fix);   Thread.Sleep(50);   }   }   // ***********************************************************************   static void Gps_PositionChanged(uint Unused, uint FixType, DateTime GPSTime)   {   string Outp = "";   Outp += "3D-Fix: " + Gps.Fix3D.ToString();   Outp += ", Sattellites: " + Gps.Satellites.ToString();   Outp += ", Time: " + Gps.GPSTime.ToString();   Outp += ", Latitude: " + Gps.SLatitude;   Outp += ", Longitude: " + Gps.SLongitude;   Outp += ", Altitude: " + Gps.SAltitude;   Outp += ", Knots: " + Gps.Knots.ToString() + " (" + Gps.Kmh.ToString() + " km/h)";   Debug.Print(Outp);   // If you want to translate this to a Bing Maps URL, try this:   Debug.Print("http://www.bing.com/maps/?q=" + Tools.RawUrlEncode(Gps.Latitude.ToString() + " " + Gps.Longitude.ToString()));   }   // ***********************************************************************   static void Gps_GotFix(uint Unused, uint FixType, DateTime GPSTime) {   Debug.Print("We got a fix, yay!!");   }   // ***********************************************************************   static void Gps_LostFix(uint Unused, uint FixType, DateTime GPSTime) {   Debug.Print("We lost our GPS fix :(");   }   // ***********************************************************************   } } "

[Chris Walker]

Hi Milt, The NmeaGps class in that toolbox is located inside a namespace, so you'll need a "using" statement at the top of your code so that Visual Studio knows which class you're using in your code. Chris

[wendo]

Specifically you'll need these two

 

using Toolbox.NETMF;using Toolbox.NETMF.Hardware;

You'll likely also want to add to the 

public static NmeaGps Gps = new NmeaGps();

to add a com port and speed, something like the below

public static NmeaGps Gps = new NmeaGps("COM1", 9600);

Also be aware, the first power up of a GPS can take a LONG time to start returning data (5 mins is common) and unless it has a battery on it it will take that amount of time every time it's powered up. If it does have a battery, and has been powered up recently it should be much faster