Please help with GSM900 and Arduino Mega2560

Official Hardware Retired GSM Shield
6

Henrigp:
The answer that I gave you before did not work ?
myself, I dont use library,
Library are changing too many parameters that you dont particularly understand , especially Github
i only use commades Hays, I spend a lot of time to understand them,

at the beginning:

include <SoftwareSerial.h>

include <string.h>

include <print.h>

include <serial.h>

//SoftwareSerial mySerial(RX, TX)
SoftwareSerial mySerial(50, 51); //OK

Serial.begin (9600);
mySerial.begin (9600);
mySerial.print ("\ r"); / / Send a newline
delay (500);

reset command, made ??that sometimes , especially after using Github

mySerial.print ("AT & F \ r"); / / Reset factory
delay (2000);
mySerial.print ("AT + CNMI = 2,1,0,0,0 \ r"); / / VERY IMPORTANT! ! !
delay (2000);
mySerial.println ("AT + CSCA = " 33660003000 \ "145 \ r"); / / To fit for your supplier and your country
delay (2000);
mySerial.println ("AT + CSAS"); / / save config
delay (200);

mySerial.print ("AT + CLIP = 1 \ r"); / / To view the phone number
delay (1000);
mySerial.print ("AT + IPR = 9600 \ r"); / / Baud rate to 9600
delay (1000);
mySerial.print ("AT + JEEC = 1 \ r"); / / For the extended errors

my favorite pages on the subject :
Short Message Service / SMS Tutorial
http://www.simcom.ee/modules/gsm-gprs/sim900/ for SIM900 AT Command Manual V1.09.pdf
GSM Equipment error codes explained
http://www.cooking-hacks.com/skin/frontend/default/cooking/pdf/SIM900_AT_Command_Manual.pdf

Dont get discouraged, it's dificult to start but then it's just fun
Henri

How would you read the GSM response when issuing an AT command to the module?
i.e. let's say I want to test the signal quality, with "AT+CSQ", how would I read the response back into the Arduino code, to be able to do something else with it?

i.e. (non working code):

if (AT+CSQ == > 10 )
{
Serial.println("Signal too weak");
}