nRF9160 Modem Firmware 1.3.0 fails in LTE connection

[khodidas]

Hi, 

I was using NCS 1.5.0 and Modem firmware 1.2.3. 

I have latest DK of nRF9160. 

It was running properly without issue specially LTE connection. 

But after I migrated from 1.2.3 to 1.3.0 modem firmware, I have noticed LTE connection failure sometimes. 

I get below print on pc terminal 

LTE Link Connecting ..

After that I don't get anything. Which means it fails to connect with LTE. 

When this issue happens I try to reset nRF9160 through  "nrfjprog --reset" but after system reset also I get same issue. 

Issue gets resolved only after I do power off and power on.  

Regards,

Smitesh Mali

[lobaro-theo]

Hello, we at Lobaro can confirm the stated issues with modem firmware 1.3.0 that may fail on connecting at some "random" conditions we where not able to identifiy yet. After downgrading to modem fw. 1.2.3 everything runs finde.

Since we use our own FreeRTOS based environment, e.g. not using the SDK, this can clearly identified in the modem fw. 

Best regards,

Theo

[Albrecht Markus Schellenberger]

Thanks a lot for your valuable input, Theodor! We will keep an eye on this one.

Regards,

Markus