I am using sim7080g https://www.waveshare.com/wiki/SIM7080G_Cat-M/NB-IoT_HAT , I am experiencing this certificate conversion issue.
AT commands I am passing are as follows:
AT
AT+CMNB=2
AT+CNMP=38
AT+CBANDCFG=NB-IOT
AT+CPIN?
AT+CEREG?
AT+CGATT?
AT+CSQ?
AT+CNCFG=0,0
AT+CNACT=0,1
AT+CFSINIT
AT+CFSWFILE=3,"ca.crt",0,1188,10000
AT+CSSLCFG="CONVERT",2,"ca.crt"
everything returns OK, except the last AT command, it throws an operation not allowed CME error.
AT+CSSLCFG=convert,2,ca.crt
+CME ERROR: operation not allowed
Does anyone know a solution?