I have an EM7430 module that I am trying to connect to my LTE eNodeB but it is instantly detaching itself after connecting.
I have added the PLMN using the !NVPLMN command. I then ran AT+CFUN=1 to enable full functionality.
To connect I used the AT+COPS=1,2,ABCDEF,7 command to force an attach where “ABCDEF” are the 6 digits of my PLMN. However, the response I get is error 30 (no network service) when I run that command.
Running AT+COPS=? returns:
+COPS: (1,“ABC DEF”,“ABC DEF”,“ABCDEF”,7),(0,1,2,3,4),(0,1,2)
Looking from the eNodeB side, the EM7430 registers and establishes an RRC connection, but then instantly detaches itself. The MME shows a Detach Request of type 3 from the EM7430 which indicates a “Combined GPRS/IMSI detach.”
Is there some AT command I’m missing here? The eNodeB and EM7430 are definitely seeing each other and communicating, but it doesn’t stay registered for more than 1 second. I know the eNodeB works and I tried the same set of commands on another EM7430 with the same results.