[Solved] Arduino Mega 2560 + GPRS Sim900 Shield problem

Hardware Arduino GSM Shield
1

Hi;

I have Arduino Mega 2560 and GSM/GPRS SIMCom SIM900 shield.

I uploaded the MakeVoiceCall code included in GSM library, mounted the shield on Mega and connected pin 2 with pin 1. I have SIM card installed into the shield. BUT when I open the monitor I only get the response "Make Voice Call", it seems that the program get stuck at statement (gsmAccess.begin).

the SIM card doesn't have PIN number.

please help

2

The GSM library provided with the IDE is intended for use with the official Arduino GSM/GPRS shield. You might be better off using a library designed for use with the SIM900 or use AT commands directly.

3

The problem is solved. I bought a new 9V battery and it worked just fine. :smiley:

4

dannable:
The GSM library provided with the IDE is intended for use with the official Arduino GSM/GPRS shield. You might be better off using a library designed for use with the SIM900 or use AT commands directly.

the shield work just like the arduino shield just need to be powered from external battery.