Hi,
I installed Gateway OS on a Raspberry Pi 4B with a single Waveshare HAT. Everything works fine, but my relay won’t sync time with GPS. I have valid NMEA data on /dev/ttyAMA0
$GNGLL,4538.12345,N,00313.56789,E,101512.000,A,A*40
$GNGSA,A,3,04,05,09,11,16,18,22,26,30,,,,1.8,0.9,1.5,1*3F
$GNGSA,A,3,,,,,,,,,,,,,1.8,0.9,1.5,2*35
$GPGSV,3,1,11,04,62,310,28,05,75,020,19,09,40,145,33,11,55,205,36,0*6A
$GPGSV,3,2,11,16,27,060,14,18,25,295,23,22,12,320,17,26,08,010,12,0*5F
$GPGSV,3,3,11,30,35,240,31,,,,,,,,0*45
$GLGSV,2,1,08,65,40,150,34,66,29,220,,67,33,075,25,68,19,200,,0*71
$GLGSV,2,2,08,69,48,050,30,70,11,180,,71,22,110,,0*7F
$GNRMC,101512.000,A,4538.12345,N,00313.56789,E,0.05,132.50,220325,,,A,V*0F
$GNVTG,132.50,T,,M,0.05,N,0.10,K,A*2A
$GNZDA,101512.000,22,03,2025,00,00*46
$GPTXT,01,01,01,ANTENNA OK*35
But with /opt/libloragw-sx1301/utils/test_loragw_gps
~~ UBX NAV-TIMEGPS sentence, triggering synchronization attempt ~~
No valid reference GPS time available, synchronization impossible
# GPS coordinates: latitude 28.34567, longitude -37.89123, altitude 10 m
# GPS err: latitude 0.00000, longitude 0.00000, altitude 0 m
I’m wondering if there’s a wrong GPIO configuration in the latest Gateway OS version ? Or perhaps the L76B GNSS module used on the Waveshare HAT isn’t compatible with Gateway OS for GPS time sync ?