GPS stops updating timestamp after a few days of uptime indoors

[Georgi Valkov]

GPS sample stops updating timestamp after a few days of uptime indoors

Tested devices: Thingy:91, nRF9160dk
Tested firmwares: mfw_nrf9160_1.2.1, mfw_nrf9160_1.2.2

Demo
https://youtu.be/i9pUtTnjjOo

Workaround:
Restart nRF9160. The issue will occur again within a couple of days.

[Heidi-Irene Harvey Sollie]

Hi!

Thanks for bringing this to our attention. I will try to reproduce this on my end, and I have also forwarded all the information in your ticket to the GPS team to take a look. 

Perhaps it would be useful to take a modem trace from when this bug occurs. If that is at all possible on your end, that could be helpful. 

Best regards,

Heidi

[Heidi-Irene Harvey Sollie]

Hi again! Could you please also provide us with the full log file?

And are you using the GPS sample in NCS out-of-box or a modified version? If it's modified, please also provide your application code. 

[Heidi-Irene Harvey Sollie]

Hi!

This issue was reported with the GPS sample, which uses the new GNSS API in NCS 1.6.0. So updating to NCS 1.6.0 should be enough to fix this. The key is to use the new GNSS API (nrf_modem_gnss.h) instead of the GNSS socket (nrf_socket.h).

[Georgi Valkov]

Thank you, Heidi! And well done to team Nordic! I'm glad to see this fixed.

I finally got a couple of days to move my projects to the new SDK and left a Thingy:91 near my window for a test. Why is it always so hard to port the projects between SDK versions? Each time there are removed or renamed CONFIG_ flags, and with so many changes I usually have to do a 3 way merge to keep my changes on top of existing samples. While with the GPS sample, I had to redesign all my changes from scratch.

This is an important thing to consider: many projects do not work across SDK versions.

[Heidi-Irene Harvey Sollie]

Yes, NCS is constantly under development and for instance module names can be changed which leads to renamed configurations etc. 

But thank you for the feedback, and I will forward this to the developers and the NCS team.

[Georgi Valkov]

Hi Heidi! I left a Thingy:91 near my window one week ago. This message is to confirm that it still works fine and has GPS signal. We can close this case as resolved. Cheers! And thank you for your help!

[Heidi-Irene Harvey Sollie]

That's great to hear! I will close this case then.