nRF9160, often reboots or ERROR after AT#XCELLPOS=2

RE: nRF9160, often reboots or ERROR after AT#XCELLPOS=2

Didrik Rokhaug — Fri, 04 Nov 2022 14:01:24 GMT

Which SDK version are you using?

Do you get the crashes on 2.1.x also?

RE: nRF9160, often reboots or ERROR after AT#XCELLPOS=2

Stas Jis — Wed, 02 Nov 2022 10:31:28 GMT

Hi Didrik,
We returned by the previous logic work with CELLPOS=1, and sometimes we have the same problem with nRF reset (it's happening much more seldom, but it's repeated):

AT+CEREG=5

OK

AT+CFUN?

+CFUN: 1
OK


AT+CEREG?

+CEREG: 5,5,"1D6B","001B6A02",7,,,"11100000","11100000"
OK

AT#XNRFCLOUD?

#XNRFCLOUD: 1,0,16842753,"50345835-3035-4060-802a-240d25e0f94e"
OK

AT#XCELLPOS=1

Ready

RE: nRF9160, often reboots or ERROR after AT#XCELLPOS=2

Didrik Rokhaug — Thu, 20 Oct 2022 11:27:55 GMT

[quote user="Stas Jis"]You wrote about NCS v2.1.0, do you mean SDK 2.1.0 for SLM firmware?[/quote]

Yes, the SLM application in version 2.1.0 of the nRF Connect SDK.

Note that cellular positioning is disabled by default.

[quote user="Stas Jis"]What will happen if we reset this definition (CONFIG_RESET_ON_FATAL_ERROR=n) ? Does the nRF module continue to work or require a reboot?[/quote]

You need to add it to the prj.conf file in the SLM project. You then need to re-build the project, and flash the nRF9160 again.

The config option will change the behaviour of the fault handler, so that it will not reset the device in case a fault happens. This allows us to get more logs out of the device in case of a fault, but you will then have to reset the device manually to get it back to a working state again.

I have also tried to reproduce it myself, and it does indeed look like the SLM is crashing in 1.9.1. However, I am not able to reproduce it with 2.1.0.

RE: nRF9160, often reboots or ERROR after AT#XCELLPOS=2

Stas Jis — Wed, 19 Oct 2022 12:32:44 GMT

Hi Didrik,
You wrote about NCS v2.1.0, do you mean SDK 2.1.0 for SLM firmware?

What will happen if we reset this definition (CONFIG_RESET_ON_FATAL_ERROR=n) ? Does the nRF module continue to work or require a reboot?

RE: nRF9160, often reboots or ERROR after AT#XCELLPOS=2

Didrik Rokhaug — Wed, 19 Oct 2022 12:15:57 GMT

Hi,

Have you tried NCS v2.1.0, to see if you get the same errors there?

Also, could you provide the log from the application (which is sent over RTT by default)?

In the case where you get the "ready" message, you might need to add CONFIG_RESET_ON_FATAL_ERROR=n as well.

Best regards,

Didrik