/// <summary>
/// constructor for GPSStringReceivedEventArgs
/// </summary>
/// <param name="data">GPS data recieved</param>
public GPSStringReceivedEventArgs(GPSData data)
{
this.data = data;
}
private bool parseNMEAStrings(string NMEAstrings)
{
gpsdata = new GPSData();
string[] SplitNMEAStrings;
string GPGGA = "";
string GPRMC = "";
SplitNMEAStrings = NMEAstrings.Split(new string[] { "\r\n" }, StringSplitOptions.RemoveEmptyEntries);
foreach (string SplitNMEAString in SplitNMEAStrings)
{
if (SplitNMEAString.Contains("$GPGGA"))
{
GPGGA = SplitNMEAString;
}
else if (SplitNMEAString.Contains("GPRMC"))
{
GPRMC = SplitNMEAString;
}
}
if (GPGGA == "" || GPRMC == "")
{
return false;
}
string[] GPRMC_Data = GPRMC.Split(new string[] { "," }, StringSplitOptions.None);
string[] GPGGA_Data = GPGGA.Split(new string[] { "," }, StringSplitOptions.None);
try
{
Double GPGGA_Lat = Convert.ToDouble(GPGGA_Data[2]);
gpsdata.Lat.Degrees = (byte)(GPGGA_Lat / 100.0);
gpsdata.Lat.Minutes = (byte)(GPGGA_Lat - gpsdata.Lat.Degrees * 100);
gpsdata.Lat.FractionalMinutes = Convert.ToUInt16((GPGGA_Lat % 1) * 10000.0);
Double GPGGA_Long = Convert.ToDouble(GPGGA_Data[4]);
gpsdata.Long.Degrees = (byte)(GPGGA_Long / 100.0);
gpsdata.Long.Minutes = (byte)(GPGGA_Long - gpsdata.Long.Degrees * 100);
gpsdata.Long.FractionalMinutes = Convert.ToUInt16((GPGGA_Long % 1) * 10000.0);
gpsdata.Altitude = Convert.ToDouble(GPGGA_Data[9]);
if (GPGGA_Data[4].ToUpper() == "N")
{
gpsdata.Lat.North = true;
}
else
{
gpsdata.Lat.North = false;
}
if (GPGGA_Data[6].ToUpper() == "E")
{
gpsdata.Long.East = true;
}
else
{
gpsdata.Long.East = false;
}
Double GPRMC_Time = Convert.ToDouble(GPRMC_Data[1]);
int hour = (int)(GPRMC_Time / 10000.0);
int min = (int)((GPRMC_Time - hour * 10000) / 100.0);
int d_sec = (int)(GPRMC_Time - hour * 10000 - min * 100);
int r_sec = (int)(GPRMC_Time % 1 * 1000);
string GPRMC_Date = GPRMC_Data[9];
int year = Convert.ToInt32(GPRMC_Date[4].ToString() + GPRMC_Date[5].ToString());
int month = Convert.ToInt32(GPRMC_Date[2].ToString() + GPRMC_Date[3].ToString());
int day = Convert.ToInt32(GPRMC_Date[0].ToString() + GPRMC_Date[1].ToString());
gpsdata.GPSDateTime = new DateTime(year + 2000, month, day, hour, min, d_sec, r_sec);
gpsdata.Velocity = Convert.ToDouble(GPRMC_Data[7]);
gpsdata.Course = Convert.ToDouble(GPRMC_Data[8]);
connected = true;
}
catch (Exception ex)
{
if (ex.Message == "Input string was not in a correct format.")
{
//this means the gps is not connected to satellites
connected = false;
return true;
}
}
return true;
}
