GPS AT Command not registering

JJ-Shapiro

Hi all,
After some great help getting AT commands working and responding to my MCU, I’m now fiddling around with GPS commands. I’ve been using nordic semi’s docs: GNSS AT commands to try and get it working, but they just keep throwing errors from the modem. Everything else is working fine, including complex things like MQTT and configuration. Any ideas as to why this specifically isn’t working/what I’d have to do to make it function?

jaredwolff

Looks like that link is broken but it’s referencing a fairly old version of NCS. Here’s the latest: https://docs.nordicsemi.com/bundle/addon-serial_modem-latest/page/app/at_gnss.html

How are you building the sample? GNSS won’t work without a .conf overlay.

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

This wouldn’t be the cause of the errors though.

Here’s the forked version of that sample which includes the appropriate overlays: https://github.com/circuitdojo/ncs-serial-modem

AchimKraus

Do you use the nRF9160 or nRF9151 feather? For the second, the nRF9151 you will also need “AT%XANTCFG=1”.

JJ-Shapiro

Yep I’m using the nRF9151. I think it must have been the outdated webpage - I got much further using the #GNSS commands. I’ll give the new configuration a shot and let you know how it goes. Thanks for your help with this.
Joe