No LTE Connectivity

[Servo]

Hello All,

I recently started testing  an nRF9160 DK board. I was able to follow through all the instructions, registered on nRF cloud and successfully connected to LTE. But ever since, for some reason the board just refuses to connect to the network. I have tried resetting the board, I even added the board again on nRF cloud but to no avail.

Has anyone encountered something similar? Please help me solve this issue. (Note: I have only used 0.52 MB of the provided data)

Thanks in advance.

[Heidi]

Hi!

For us to investigate this issue, we will need the log file from LTE Link Monitor (an application available in nRF Connect for Desktop)  while you're trying to connect. Please let the device try to connect for at least 10 minutes and then press the button below to get the full log in .txt format, then attach it in your new comment.

Best regards,

Heidi

[Servo]

Thanks Heidi. I have tried waiting for even an hour but it does not connect I will send the log by tomorrow.

Thank you

Sincerely,

Sarvjit

[Servo]

Hello Heidi,

Apologies for the late reply. I got sidelined with other tasks at hand. Please find here the latest log from today. Hope this will help clear up the issue. 

Sincerely,

Sarvjit

Fullscreen 2020-06-17T17_46_23.864Z-log.txt Download

2020-06-17T17:46:28.413Z INFO Application data folder: C:\Users\sarvj\AppData\Roaming\nrfconnect\pc-nrfconnect-linkmonitor
2020-06-17T17:46:28.981Z DEBUG App pc-nrfconnect-linkmonitor v1.1.1 official
2020-06-17T17:46:28.982Z DEBUG App path: C:\Users\sarvj\.nrfconnect-apps\node_modules\pc-nrfconnect-linkmonitor
2020-06-17T17:46:28.982Z DEBUG nRFConnect 3.3.3 is supported by the app (^3.2.0)
2020-06-17T17:46:28.982Z DEBUG nRFConnect path: C:\Users\sarvj\AppData\Local\Programs\nrfconnect\resources\app.asar
2020-06-17T17:46:28.982Z DEBUG HomeDir: C:\Users\sarvj
2020-06-17T17:46:28.982Z DEBUG TmpDir: C:\Users\sarvj\AppData\Local\Temp
2020-06-17T17:46:32.306Z INFO Modem port is opened
2020-06-17T17:46:35.920Z DEBUG modem >> AT\x0D\x0A
2020-06-17T17:46:36.919Z ERROR Error: 'AT
' timed out
2020-06-17T17:46:45.963Z DEBUG modem >> at+creg?\x0D\x0A
2020-06-17T17:46:46.964Z ERROR Error: 'at+creg?
' timed out
2020-06-17T17:47:00.042Z DEBUG modem >> AT+COPS=?\x0D\x0A
2020-06-17T17:47:10.193Z INFO Modem port is opened
2020-06-17T17:47:12.525Z DEBUG modem >> AT+CFUN?\x0D\x0A
2020-06-17T17:47:13.526Z ERROR Error: 'AT+CFUN?
' timed out
2020-06-17T17:47:46.819Z DEBUG modem >> AT\x0D\x0A
2020-06-17T17:47:47.820Z ERROR Error: 'AT
' timed out
2020-06-17T17:48:00.044Z ERROR Network search failed: Error: 'AT+COPS=?
' timed out
2020-06-17T17:48:00.045Z DEBUG modem >> AT+COPS=?\x0D\x0A
2020-06-17T17:49:00.046Z ERROR Network search failed: Error: 'AT+COPS=?
' timed out
2020-06-17T17:49:22.191Z DEBUG modem >> at+creg?\x0D\x0A
2020-06-17T17:49:23.193Z ERROR Error: 'at+creg?
' timed out

[Heidi]

Hi, this log doesn't really contain any information. (Side note, the command is AT+CEREG, not AT+CREG)

What version of the DK do you have? 

It looks like the application does not even begin to run, which is strange. Could you try flashing the Asset Tracker application again? 

For LTE-M: nrf9160dk_asset_tracker_ltem_debug_2020-04-29_bc7ade8b.hex

For NB-IoT: nrf9160dk_asset_tracker_nbiot_debug_2020-04-29_bc7ade8b.hex

[Servo]

Hello Heidi,

I was able to flash the asset tracker and it is now connected to the network. But for some reason the connection is very unstable and keeps disconnecting every few seconds. I have attached the log here.

We are mulling on using the Nordic nRF9160 lte board as the default for communication in our portable device. As such, I am trying to conduct a test on the signal quality, specifically [rssi, ber] values for different scenarios. Could you also help with the same if possible. I have successfully conducted similar tests on other lte devices using putty. It is imperative that I conduct a similar test on nRF9160 to compare results.

Please advise.

Thank You

Sincerely,

Sarvjit2020-06-22T19_44_16.154Z-log.txt