Syntax: $--VTG,x.x,T,x.x,M,x.x,N,x.x,K,a*hh<CR><LF>
Description of fields
Examples
For NMEA v4.0 and v4.1:
Standard Talker ID = GPS only
$GPVTG,152.3924,T,152.3924,M,0.018,N,0.034,K,A*2D
Standard Talker ID = GNSS
$GNVTG,188.6002,T,188.6002,M,0.009,N,0.016,K,A*33