Failed to open AT socket (err:-12)

[oKruszek]

Hello,

I developed board with NRF9160 chip and I am facing issue with "at_cmd: Failed to open AT socket (err:-12)", i am not able to communicate with modem. It is not working with any of examples and also asset_tracker application. I am able to update firmware in modem and flash the chip. The same examples works fine on NRF9160-DK Board, the only difference i noticed is that the DK board has NRF9160_xxAA_REV1, and my board is with NRF9160_xxAA_REV2. Did anyone faced the same issue?

Regards,

Michal

[Øyvind]

Hello Michal, 

What version of NCS and modem fw are you running? The error message means:

#define	ENOMEM		12	/* Out of memory */

Kind regards,
Øyvind

[oKruszek]

Hello,

I am using the 1.1.0 modem firmware ( due to certification for Deutsche Telekom ) and the same version of NCS v1.1.0

Regards,

Michal

[Øyvind]

Hi Michal, 

Is there a reason for why you are using NCS v1.1.0? Why not use NCS 1.3.0?

Depending on how the board files for the custom board is set up, it could be that bsdlib is not initialized. Can check in build/zephyr/.config. What's the status for CONFIG_BSD_LIBRARY and CONFIG_BSD_LIBRARY_SYS_INIT ?

Kind regards,
Øyvind

[oKruszek]

Hi, 

Both are set for 1, and I use that to fetch result:

err = bsdlib_get_init_ret();

The result of bsdlib init is sucessfull, at_configure() function fail.
I cannot use the v1.3.0 version because it needs modem firmware in 1.2.0 version, and this version is not approved my Deutche Telekom according to:
https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcomp_matrix_nrf9160%2FCOMP%2Fnrf9160%2Fnrf9160_operator_certifications.html

Regards,
Michal

[oKruszek]

Hi,

I changed my project to use NVS 1.3.0, and it is not working either. But now i different way because the application hangs on:

bsdlib_init(); - when CONFIG_BSD_LIBRARY_SYS_INIT=n

With

CONFIG_BSD_LIBRARY_SYS_INIT=y

the application does not enter main() function

Regards,

Michal

[Øyvind]

Michal, 

The Mobile network operator certifications only mentions modem FW 1.1.0, and not the version of nRF Connect SDK (NCS). NCS has been tested with modem FW 1.3.0 but does not require it to work. You should also be able to run NCS 1.2.0. 

Please test using NCS 1.2.0 or NCS 1.3.0.

Thanks,
-Øyvind