Operating system name and version: Ubuntu 20.04.6 LTS
Version of smsd: 3.1.21
Smsd installed from: package repository
Name and model of a modem / phone: ID 2c7c:0121 Quectel Wireless Solutions Co., Ltd. EC21 LTE modem
This happens about once every 24 hour:
2023-04-11 18:24:40,6, GSM1: Checking if modem needs PIN
2023-04-11 18:24:40,7, GSM1: -> AT+CPIN?
2023-04-11 18:24:40,7, GSM1: Command is sent, waiting for the answer. (10)
2023-04-11 18:24:50,7, GSM1: No answer, put_command expected (OK)|(READY)|( PIN)|( PUK)|(ERROR), timeout occurred. 1.
2023-04-11 18:24:50,7, GSM1: <-
2023-04-11 18:24:50,2, GSM1: PIN handling: expected READY or OK, modem answered
2023-04-11 18:24:50,2, GSM1: Modem handler 0 terminated abnormally. PID: 1500447, was started 23-04-11 06:42:00, up 11:42.
2023-04-11 18:24:50,2, smsd: Modem handler 0 (GSM1) terminated while mainprocess is still running. Exited, status 1.
After restarting the service everything works again for a while.
This started happening about two weeks ago and we didn't change anything prior to it.