Hi

I have a EFCOM gsm shield  http://www.elecfreaks.com/store/gprsgsm-shield-efcom-shdefcom-p-415.html connected up to Arduino Mega 2560 Via Hardware rx and tx on the gsm shield to the pins 18 and 19 on the Arduino mega.

Sketch used on mega
void setup()
{
Serial.begin(19200);
Serial1.begin(19200);
}

void loop()
{
if (Serial1.available())
Serial.write(Serial1.read());
if (Serial.available())
Serial1.write(Serial.read());
}


I can seen the GSM shield trying to connect to the network but then it looks like it restarts and prints some strange characters (see video here of net and sta lights on shield and serial output https://www.youtube.com/watch?v=ZUgf23aL9Fk) and continues the process over again.

if I enter the following AT+COPS=? I get :

+COPS: (1,"2degrees","2degrees","53024"),(1,"vodafone NZ","voda NZ","53001"),,(0,1,4),(0,1,2)

So it is in some way communicating with gsm networks.

- I have tried using a different carriers sim card.
- Have tired using different power supplys.
- Have checked the IMEI is not black listed here in New Zealand.
- Have re-flashed firmware onto sim900.
- Have tried changing the AT+COPS from Auto mode to manual mode and entered the information for the carrier of the sim card.

I am not sure what else to do, any help would be appreciated

Thanks

Richard