nRF9160: How to recover when modem call lte_lc_connect() returns -116.

RE: nRF9160: How to recover when modem call lte_lc_connect() returns -116.

Hakon — Fri, 04 Feb 2022 16:21:47 GMT

[quote user="GameCodingNinja"]err = k_sem_take(&link, K_SECONDS(CONFIG_LTE_NETWORK_TIMEOUT));[/quote]

Maybe you can try changing it to k_sem_take(&link, K_FOREVER) to stop it from timing out.

RE: nRF9160: How to recover when modem call lte_lc_connect() returns -116.

GameCodingNinja — Mon, 31 Jan 2022 15:44:31 GMT

lte_lc_connect_async() calls the same function connect_lte() but without blocking.

On line 668 of file lte_lc.c, it times out on the below line.
err = k_sem_take(&link, K_SECONDS(CONFIG_LTE_NETWORK_TIMEOUT));

This is where err = -116 is generated. Not sure why the semaphore is timing out. I even doubled it from 60 seconds to 120.

RE: nRF9160: How to recover when modem call lte_lc_connect() returns -116.

Hakon — Mon, 31 Jan 2022 13:00:56 GMT

Hello,

[quote user=""]But once lte_lc_connect() returns -116, it will never connect again and I have to reboot the board. Any idea of how I can recover from this?[/quote]

Have you tried just calling lte_lc_connect_async() after receiving the -116 error? I'm not sure that's the best way to handle it, but I guess you can try that.