GNSS support?

cptel

I read the nRF9151 Feather has Integrated GPS. Does it support GNSS positioning with the antenna that I purchased through your site?

I did not get a GPS position using GNSS under open sky with the antenna I purchased through your site. I am able to get a GNSS position with the nRF9151DK (Dev Kit from Nordic) in under a minute under same physical conditions. GPS acquisition timeout is set to 4 minutes - ample for any outdoor condition.

jaredwolff

cptel make sure you copy over the configuration from the GPS sample in NFED. One of the control pins need to be activated.

https://github.com/circuitdojo/nrf9160-feather-examples-and-drivers/blob/v3.0.x/samples/gps/boards/circuitdojo_feather_nrf9151_ns.conf

cptel

for my reference - what is the difference in adding it to …./circuitdojo_feather_nrf9151_ns.conf vs. …/prj.conf file? and how can I validate the command/config update took place.

jaredwolff

You should add it to boards/circuitdojo_feather_nrf9151_ns.conf

The boards folder is used for board specific overlays. This particular settings only apply to this board, if you apply them at the prj.conf level it will, for example, possibly affect your app if you compile for the 9151DK

AchimKraus

Just to mention:
You not only need

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

you also need the

#define AUXANTCFG_ENABLE "AT\%XANTCFG=1"
...
int err = nrf_modem_at_printf("%s", AUXANTCFG_ENABLE);

from “samples/gps/src/startup.c”.