GPRS.println("AT+CNMI=2,2,0,0,0\r");
In what way doesn't it work? When you issue the command do you get an error? You only need to do this once, the modem will remember the setting until it is reset.
GPRS.println("AT+CNMI=2,2,0,0,0\r");
In what way doesn't it work? When you issue the command do you get an error? You only need to do this once, the modem will remember the setting until it is reset.