Open f4grx opened 10 months ago
Hi,
In recent GPS receivers like the ZED-F9P that I am fortunate to have, the GPS frames are multiconstellation.
As a consequence the useful messages are prefixed with GN and not with GP as in previous versions of the NMEA standard.
See here, page 24: https://content.u-blox.com/sites/default/files/documents/u-blox-F9-HPG-1.32_InterfaceDescription_UBX-22008968.pdf
$GP is only for GPS specific stuff, the "combined" position info is now prefixed with $GN.
Example NMEA coming from an unlocked F9P:
GNGLL,,,,,,V,N*7A GNRMC,,V,,,,,,,,,,N,V*37 GNVTG,,,,,,,,,N*2E GNGGA,,,,,,0,00,99.99,,,,,,*56 GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99,1*33 GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99,2*30 GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99,3*31 GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99,4*36 GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99,5*37 GPGSV,1,1,00,0*65 GLGSV,1,1,00,0*79 GAGSV,1,1,00,0*74 GBGSV,1,1,00,0*77 GQGSV,1,1,00,0*64
The version that is presently in F-droid seemed to be unable to handle this.
I'm ready to test as soon as you have something available.
Thank you!
Will look into this if I get a chance, but it should be a relatively easy fix. Thanks for the details :)
Hi,
In recent GPS receivers like the ZED-F9P that I am fortunate to have, the GPS frames are multiconstellation.
As a consequence the useful messages are prefixed with GN and not with GP as in previous versions of the NMEA standard.
See here, page 24: https://content.u-blox.com/sites/default/files/documents/u-blox-F9-HPG-1.32_InterfaceDescription_UBX-22008968.pdf
$GP is only for GPS specific stuff, the "combined" position info is now prefixed with $GN.
Example NMEA coming from an unlocked F9P:
The version that is presently in F-droid seemed to be unable to handle this.
I'm ready to test as soon as you have something available.
Thank you!