Getting IMEI #40
Description
I use : Arduino Mega and SIM900 GSM Breakout board,
My problem is getting IMEI from SIM900, but although all trials like
gsm.SimpleWriteln("AT+GSN=?");
gsm.SimpleWriteln(F("AT+GSN"));
gsm.getIMEI(imei);
They do not work, what can I do?
Thanks