We are doing tests and developments with a Quectel BC28 NB-IoT Module.
Previous we used BC28JB-02 and recently we switched to BC28JA-02-STD:
In the new modules (BC28JA-02-STD) when we send the AT Command AT+CPIN? We are receiving ERROR as a response.
For AT+CIMI I get the CIMI number as a response. But the AT+CPIN? returns ERROR.
I believe the SIM Card is detected and readable since I get a response for AT+CIMI.
Is there anything I can do more to debug this issue.
Below are the details of the modem,
SSB,V150R100C10B200SP1
SECURITY_A,V150R100C20B300SP2
PROTOCOL_A,V150R100C20B300SP2
APPLICATION_A,V150R100C20B300SP2
SECURITY_B,V150R100C20B300SP2
RADIO,Hi2115_RF1