GPS not working with HW version 6

PaoloZigoni

Hello,

I have a big problem with the new boards I have ordered. It looks like there is a difference between v05 and v06.
On all boards I have upgraded the modem firmware to versione 1.3.6.

The problem is as follow, with GPS: after the SUPL client downloads the satellite informations, i am not able to get fixes. It always report traking:0.

I have checked the antenna connector, and while tracking there is no 3.3V.
With v05 revision i get the 3.3V voltage on the connectror.

Please can you help in debugging this issue? I was not expecting differences, and It is urgent.

Thank you very much

jaredwolff

Hi @PaoloZigoni

There shouldn’t be any differences related to GPS from v5 to v6. Are you attempting to get a GPS fix inside a building? Generally, it’s very difficult to get a fix while inside. I go outside with direct line of sight to the sky to double check GPS.

What type of antenna are you using? Can you share a part number?

Do you have this in your prj.conf or board config overlay boards/circuitdojo_feather_nrf9160_ns.conf?

# GPS Antenna configuration
CONFIG_MODEM_ANTENNA=y
CONFIG_MODEM_ANTENNA_AT_COEX0="AT\%XCOEX0=1,1,1565,1586"

PaoloZigoni

Hello Jared,

thanks for the quick feedback.
The problem is not related to the GPS signal, as I am in open sky conditions.
I have tried to add the two settings you suggested to my prj.com, and now I see the 3.3V on the antenna connector and it looks like it is working again.

It is weird as those two configs were already present in the default configuration.
I need to investigate on this.

Thank you!

jaredwolff

You’re very welcome. Good luck with your demo!