Never seeing GPS_EVT_SEARCH_TIMEOUT and only seeing GPS_EVT_SEARCH_STARTED once (nrf9160)

[willFireHud]

Hi!

I am developing an application that starts and stops gps occasionally. I am running the gps in GPS_NAV_MODE_PERIODIC with a timeout of 100s and an interval of 240s. However, even after well over 100s, I do not see GPS_EVT_SEARCH_TIMEOUT. Can you explain why the application is behaving this way and any suggestions for fixing this issue?

Another weird behavior I have noticed is that after initially starting the gps, I only see GPS_EVT_SEARCH_STARTED when the interval ends after getting a fix the previous interval. I do not see GPS_EVT_SEARCH_STARTED after manually stopping and restarting the gps functionality. Is this the intended behavior or is something wrong?

Thanks in advance for the help!

[Didrik Rokhaug]

Hi,

Could you enable debug logging in the GPS driver, and take a modem trace?

You can enable debug logging by setting CONFIG_LOG=y and CONFIG_NRF9160_GPS_LOG_LEVEL_DBG=y in your prj.conf file.

You can read how to take modem traces here: https://infocenter.nordicsemi.com/topic/ug_trace_collector/UG/trace_collector/intro.html

Best regards,

Didrik

[anicare-tero]

Hi willFireHud,

Have you figured this out?

Do you have A-GPS enabled? I just faced problems with timeout&interval when I enabled SUPL A-GPS. Earlier they were working without SUPL.

Here is my ticket if you are interested.