private void UpdatePosition()
{
if (mNMEAClient != null)
{
try
{
if ((mNMEAClient.Status & NMEAGPSClient.NMEAGPSClient.GPS_STATUS.Fix) == NMEAGPSClient.NMEAGPSClient.GPS_STATUS.Fix)
{
GPSPosition position = mNMEAClient.PositionInformation;
mLocationMessage.SetLocation((uint)position.HorizontalErrorEstimate, position.CurrentPosition.Latitude, position.CurrentPosition.Longitude, position.SpeedOverGround);
TrackingEvent tEv = (mNMEAClient.TravellingState == NMEAGPSClient.NMEAGPSClient.MovingState.Moving) ? TrackingEvent.POSITION_MOVING : TrackingEvent.POSITION_STATIONARY;
StateMachine(tEv);
}
else
{
mLocationMessage.MessageId = (mNMEAClient.Status == NMEAGPSClient.NMEAGPSClient.GPS_STATUS.OFFLINE) ? RTTMesg.RTTOutMsgIds.GPSNone : RTTMesg.RTTOutMsgIds.GPSNoFix;
StateMachine(TrackingEvent.LOST_GPS);
//CNXLog.WarnFormat("Setting state for No Fix {0}", mMobileMessage);(mNMEAClient.Status == NMEAGPSClient.NMEAGPSClient.GPS_STATUS.OFFLINE)
}
}
catch (Exception ex)
{
CNXLog.Error("TrackerState GPS position error {0}", ex);
}
}
}
/// <summary>
/// Create a GPS message
/// </summary>
/// <param name="error">Error estimation</param>
/// <param name="alarmActive">Alarm state</param>
/// <param name="latitude">Current latitude in WGS84 decimal degrees.</param>
/// <param name="longitude">Current longitude in WGS84 decimal degrees.</param>
/// <param name="velocity">Current horizontal velocity in meters/second.</param>
/// <returns>GPS message</returns>
/// <remarks>
/// When the TrackingState is packed into a byte array to be used as an RTT message values may be truncated as follows: -
/// Latitude/Longitude will be truncated to single presision floating point numbers.
/// The error values is packed into 6 bits in 3 meter increments giving a maximum value of 208 meters.
/// </remarks>
public static RTTMesg CreateGPSFix(uint error, bool alarmActive, double latitude, double longitude, double velocity)
{
RTTMesg mesg = new RTTMesg();
mesg.SetLocation(error, latitude, longitude, velocity);
mesg.mAlarm = alarmActive;
return(mesg);
}