private int GetChecksum(byte[] bytes)
{
var calculatedChecksum = MeiligaoChecksum.CalculaChecksum(bytes, 0, bytes.Length - 4);
var checksumInPacket = new[] { bytes[bytes.Length - 4], bytes[bytes.Length - 3] };
var c = BitConverter.ToUInt16(calculatedChecksum, 0);
var d = BitConverter.ToUInt16(checksumInPacket, 0);
if (c != d)
{
return(0);
}
return(AuxConvert.ToInt(c));
}
private decimal GetLatitud(string stringPart, string hemisphere)
{
int hemIndicator = 1;
if (hemisphere.ToLowerInvariant() == "s")
{
hemIndicator = -1;
}
decimal deg = AuxConvert.ToDecimal(stringPart.Substring(0, 2));
decimal min = AuxConvert.ToDecimal(stringPart.Substring(2));
decimal lat = (deg + (min / 60)) * hemIndicator;
return(lat);
}
private decimal GetLongitud(string stringPart, string sideofMeridian)
{
int sideIndicator = 1;
if (sideofMeridian.ToLowerInvariant() == "w")
{
sideIndicator = -1;
}
decimal deg = AuxConvert.ToDecimal(stringPart.Substring(0, 3));
decimal min = AuxConvert.ToDecimal(stringPart.Substring(3));
decimal longit = (deg + (min / 60)) * sideIndicator;
return(longit);
}
private DateTime GetDateTime(string datePart, string timePart)
{
//hhmmss
var hour = AuxConvert.ToInt(timePart.Substring(0, 2));
var min = AuxConvert.ToInt(timePart.Substring(2, 2));
var secParts = timePart.Substring(4, 4).Split('.');
var sec = AuxConvert.ToInt(secParts[0]);
var secDecimal = AuxConvert.ToInt(secParts[1]) * 10;
//ddmmyy
var day = AuxConvert.ToInt(datePart.Substring(0, 2));
var month = AuxConvert.ToInt(datePart.Substring(2, 2));
var year = AuxConvert.ToInt("20" + datePart.Substring(4, 2));
return(new DateTime(year, month, day, hour, min, sec, secDecimal));
}
private void GetGPSData(byte[] datos, int offset = 0)
{
var dataSection = this.GetDataSection(datos, offset);
var dataComponents = dataSection.Split('|');
if (dataComponents.Length == 0)
{
return;
}
this.GetGPRMC(dataComponents[0]);
this.mp.HDOP = dataComponents[1];
this.mp.Altitud = AuxConvert.ToDecimal(dataComponents[2]);
this.mp.DataBytes = Convert.ToString(Convert.ToInt32(dataComponents[3], 16), 2).PadLeft(16, '0');
}
private decimal GetDireccion(string directionString)
{
return(AuxConvert.ToDecimal(directionString));
}
private decimal GetVelocidad(string speedString)
{
return(AuxConvert.ToDecimal(speedString));
}
