Speed info

[suitor80]

Hi
I'm a newbie. Is there a way to parse speed information from NMEA? And add it to print statement. I know gpsmon shows speed. I was thinking of something like msg.speed_ms or msg.speed_kmh

[fohrloop]

Hello, @suitor80

I think questions like this are better suited as Stackoverflow questions, but here's a simple example. You probably want to look at the VTG NMEA Sentences, such as GPVTG (GPS) or GNVTG (multi-GNSS). Here is an example of parsing such NMEA message

In [1]: import pynmea2

In [2]: msg = pynmea2.parse("$GPVTG,77.52,T,,M,0.004,N,0.008,K,A*06\r\n")

In [3]: msg
Out[3]: <VTG(true_track=77.52, true_track_sym='T', mag_track=None, mag_track_sym='M', spd_over_grnd_kts=Decimal('0.004'), spd_over_grnd_kts_sym='N', spd_over_grnd_kmph=0.008, spd_over_grnd_kmph_sym='K', faa_mode='A')>

# Speed km/h
In [4]: msg.spd_over_grnd_kmph
Out[4]: 0.008

# Course over ground (degrees) 0 to 359, wrt. True north
In [5]: msg.true_track
Out[5]: 77.52