Ive been studying the AT command "AT+CPIN", and i notice that the modem N30 returns the same information in two different cases:
When there is not a SIM card inserted, the modem returns:
at+cpin?
+CPIN: READY
OK
And when there is a SIM card and the PIN was already sent (the modem is registered), then the modem returns the same.
I would like to be able to differenciate these two situations in some way, could anybody help me? is there another AT command I could use to view the real situation?
Well, in the Nokia 30 GSM Connectivity Terminal AT Command Guide v2.0 ive found that the command 'AT+CPIN?' can returns +CME ERROR when it doesnt have the SIM inserted.
+CME ERROR: 10
(ME does not have a SIM connected to it)
What it happens is that in the Nokia30, i dont get this error, and according to the manual i should get it, right?