Hi,
I have several field devices using the LTE Link Controller library with nRF Connect SDK v2.5.1. Most of them work fine — they are programed to connect every hour. However, I’ve noticed 2 devices that were previously connecting fine suddenly lost connection because they were moved in an area with poor network coverage.
When these devices moved back into an area with good coverage, they never reconnected automatically. After performing a power cycle, they immediately reconnected and started working normally again.
Unfortunately, the only thing I was able to recover was a partial log which show the modem trying this every hour:
[27:01:28.516,723] <inf> app_event_manager: APP_EVT_DATA_GET - Requested data types (MOD_STAT)
[27:01:28.533,050] <err> modem_info_params: Link data not obtained: 5 -22
[27:01:28.533,081] <err> modem_module: modem_info_params_get, error: -22
[27:01:28.533,172] <inf> app_event_manager: MODEM_EVT_MODEM_STATIC_DATA_NOT_READY
I have two questions about the LTE Link Controller behavior:
-
Once
lte_lc_connect_async()is called, does it need to be called again after a connection loss, or does the library automatically retry? -
The
CONFIG_LTE_NETWORK_TIMEOUTparameter is set to 600. From my understanding, it only applies during the initiallte_lc_connect_async()call. What happens after a connection loss — how many retries are attempted, and does the library eventually stop retrying at some point?
Thanks in advance for your help!
