(AT-command in gsm modem) AT+CMGF value change after reboot

Question

my problem is : after set AT+CMGF = 1 ( for Text mode SMS), everything work well until GSM modem reboot After reboot, AT+CMGF? command return 0 , this means modem need re-config for CMGF parameter.

Please help to save the config value even after reboot. Thanks so much.

Answer 1

The traditional modem way to store configuration settings is through profiles, controlled with AT command AT&W, see my answer for some details about that command. Now if your particular modem supports more than one profile and if the AT+CMGF mode is included is another question, but at least AT&W is what I would start investigating around.