Hello, I tried all the examples of the MKRGSM library and I have the same problem each time. The modem does not respond correctly to AT + CPIN? I receive ERROR systematically after AT+CPIN? My SIM card does not have a PIN, so I used #define SECRET_PINNUMBER "". I also tried gsmAccess.begin(NULL)…

MKR1400 AT+CPIN? Problem

innometrix December 11, 2017, 5:23pm 10

OK
AT+CMEE=2

OK
AT+CPIN?

+CME ERROR: SIM not inserted