0

FONA 3G (sim5320) gps not working - again!
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

FONA 3G (sim5320) gps not working - again!

by danielpaley on Sat Aug 15, 2020 1:35 am

Hi folks.
followed the prior instructions found here (and other places). I've put a solder bridge on the board (using active antenna). For a short time I was getting GPS information on one of the two board I've got. But power cycling the board caused GPS to go away. Second board has not generated GSP information.

That said, I am getting 4 SAT's (from at+cgpsinfocfg=10,31 -> generated

$GPGSA,A,1,,,,,,,,,,,,,,,*1E
$GPGSV,4,1,16,32,,,,24,,,,29,,,,05,,,*72
$GPGSV,4,2,16,18,,,,22,,,,04,,,,11,,,*75
$GPGSV,4,3,16,17,,,,03,,,,12,,,,30,,,*7C
$GPGSV,4,4,16,01,,,,23,,,,15,,,,27,,,*7F
$GPGGA,,,,,,0,,,,,,,,*66
$GPVTG,,T,,M,,N,,K,N*2C
$GPRMC,,V,,,,,,,,,,N*53''

but the at+cgpsinfo generates ->
at+cgpsinfo
+CGPSINFO:,,,,,,,,

AmpI/AmpQ: 509/507

I've set the clock and it's showing the correct time and date. I've looked at all the GPS commands to see if I'm missing something - but I've not had any joy in resolving. Like I said, somewhere while setting the first board, I was able to get GPS information reporting correctly. What am I missing?

danielpaley
 
Posts: 2
Joined: Wed Aug 30, 2017 12:49 pm

Re: FONA 3G (sim5320) gps not working - again!

by danielpaley on Sat Aug 15, 2020 1:59 am

alright a bit more information. I found and loaded the simcom GPS demo (V1.07). I'm using the SIM7100E setting. It seems to be finding stuff alright... so it may just be a reporting issue. what would cause the difference from the NMEA 9000 port reporting in NMEA format and the at+cgpsinfo reporting on command (or cgpsinfocfg for that matter).

any ideas why?

danielpaley
 
Posts: 2
Joined: Wed Aug 30, 2017 12:49 pm

Please be positive and constructive with your questions and comments.