nRF9160 UICC failure

[Adamcs]

Hi,

I'm trying to run the nrf/samples/cellular/at_monitor sample (v3.2.1), but I keep getting this output.

*** Booting nRF Connect SDK v3.2.1-d8887f6f32df ***
*** Using Zephyr OS v4.2.99-ec78104f1569 ***
AT Monitor sample started
Subscribing to notifications
Connecting to network
Resuming link quality monitor for AT notifications
Waiting for network
Network registration status: UICC failure

I have two nRF9160 devkits, and they both are giving me this same result. I've tried 3 different sim cards as well, two of which were the included iBASIS eSIM. I was doing some testing with SDK v3.1.1 a few months back and had no issues with the devkit/SIM card I had at the time. I've tried going back to SDK v3.1.1 and testing cellular fundamentals lesson 2 example 2 but it also doesn't connect.

*** Booting nRF Connect SDK v3.1.1-e2a97fe2578a ***
*** Using Zephyr OS v4.1.99-ff8f0c579eeb ***
[00:00:00.294,036] <inf> Lesson2_Exercise2: Initializing modem library
[00:00:00.534,240] <inf> Lesson2_Exercise2: Connecting to LTE network
+CEREG: 90

I'm using VS Code with the nRF Connect extension to flash the devkits. I've also tried flashing modem firmware v1.3.7 through the desktop application first just in case that was somehow missing.

What can I do to troubleshoot this?

Thanks

[Simon D-M]

Hi Adam,

First thing you can check is if the board is configured correctly. Does it have the "SIM current measurement" jumper (P30) on, and is the "SIM select" switch (SW7) on "SIM" (even tho iBASIS call their cards "eSIM", they are normal SIM cards. eSIMs are an electronic chip that you solder to your board. wikipedia link). 

If you have another nRF91 development kit, you can try to use the SIM card on this other device to check if the SD card is working.

For the iBASIS cards, you should be able to check on your nRF Cloud account how much data is remaining on your SIM.

Tell me if any of this worked !

If not, please send the modem traces (link) so that I can analyze a bit more what is happening ?

Best regards,

Simon D-M

[Adamcs]

Simon D-M said:

Does it have the "SIM current measurement" jumper (P30) on,

Ahhh, that was the issue. Thanks Simon, I was losing my mind over this during the weekend.