Speed indicator not working if there are no NMEA VTG message present

farmerbriantee / AgOpenGPS

Ag Precision Mapping, Section Control and Guidance Software

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Speed indicator not working if there are no NMEA VTG message present #410

Closed Xyntexx closed 2 months ago

Xyntexx commented 3 months ago

The GPS needs to output VTG messages for speed measurements to work. If no VTG message is present the speed will show 3.4E+38. This issue could be fixed by calculating the speed from the position like the simulator does.

Davidwedel commented 3 months ago

VTG is also used for heading. It's an essential.

farmerbriantee commented 2 months ago

Yes, if using GGA, you also need to use VTG to get the speed. We tried manually calculating based on fix, but wasn't stable. Just enable vtg to be sent in your gps