LTE Link Monitor Issue with 9160

[Benjamin]

I was starting to develop for our own board based on the nRF9160 where we will just be using the LTE-M and while doing so, ran into issues with enabling the LTE. To do a sanity check, I went back to the 'at_client' example in the nRF Connect SDK 2.0.2 and programmed it on. I opened up the LTE Link Monitor v2.0.1 and this is what I'm seeing -- all the status indicators are red or gray:

I was able to get the Modem and UICC to turn green *once* by pulling out the SIM card and putting it back in, but then restarted the board and everything is red again. Here is my log file contents:

2022-08-01T21:44:31.667Z DEBUG Application data folder: /Users/user/Library/Application Support/nrfconnect/pc-nrfconnect-linkmonitor
2022-08-01T21:44:32.762Z INFO Using nrf-device-lib-js version: 0.4.11
2022-08-01T21:44:32.762Z INFO Using nrf-device-lib version: 0.11.8
2022-08-01T21:44:32.763Z INFO Using nrfjprog DLL version: 10.15.4
2022-08-01T21:44:32.763Z INFO Using JLink version: JLink_V7.64e
2022-08-01T21:44:32.895Z DEBUG App pc-nrfconnect-linkmonitor v2.0.1 official
2022-08-01T21:44:32.895Z DEBUG App path: /Users/user/.nrfconnect-apps/node_modules/pc-nrfconnect-linkmonitor
2022-08-01T21:44:32.895Z DEBUG nRFConnect 3.11.1, required by the app is (^3.8.0)
2022-08-01T21:44:32.895Z DEBUG nRFConnect path: /Applications/nRF Connect for Desktop.app/Contents/Resources/app.asar
2022-08-01T21:44:32.895Z DEBUG HomeDir: /Users/user
2022-08-01T21:44:32.895Z DEBUG TmpDir: /var/folders/0l/h7c0fmrn2s99zfj4sb1qlk_r0000gn/T/
2022-08-01T21:44:32.913Z INFO Installed JLink version does not match the provided version (V7.58b)
2022-08-01T21:44:35.732Z INFO Modem port is opened
2022-08-01T21:44:35.759Z DEBUG modem >> AT+CFUN?
2022-08-01T21:44:35.801Z DEBUG modem << +CFUN: 0
2022-08-01T21:44:35.804Z DEBUG modem << OK
2022-08-01T21:44:40.573Z DEBUG modem >> AT
2022-08-01T21:44:40.585Z DEBUG modem << OK
2022-08-01T21:44:51.655Z DEBUG modem << *** Booting Zephyr OS build v3.0.99-ncs1-1  ***
2022-08-01T21:44:51.676Z DEBUG modem << The AT host sample started
2022-08-01T21:45:13.078Z DEBUG modem >> AT+CFUN?
2022-08-01T21:45:13.088Z DEBUG modem << +CFUN: 0
2022-08-01T21:45:13.125Z DEBUG modem << OK
2022-08-01T21:45:14.661Z DEBUG modem >> AT+CFUN=1
2022-08-01T21:45:14.705Z DEBUG modem << OK
2022-08-01T21:45:48.294Z DEBUG modem >> AT+COPS=?
2022-08-01T21:48:48.295Z ERROR Network search failed: Error: 'AT+COPS=?
' timed out

What could possibly be going wrong here? I thought I was just configuring our new project incorrectly, but now using the 'at_client' example I get the same behavior. 

[Charlie]

Hi Benjamin,

This is as expected.

at_client and serial_lte_modem examples are designed for developers to set up and run the device with commands manually, run "AT+CFUN=1" will connect the device with the cellular network. It will take some time before the device finds a network and all labels turn green. The "Automatic requests" SETTINGS will run some commands following your "AT+CFUN?" to check current network states.

Best regards,

Charlie

[Benjamin]

With the at_client I still have issues when trying to follow the main at commands. I did double check I have plenty of available data on the iBasis sim card, which I know at least used to connect to LTE-M and I could send data to the cloud. This is what I'm seeing now. I'm confused as to why the UART one is red, but the LTE one just keeps pulsing yellow and red.