Arduino GSM shield not connecting

Question

I have an arduino GSM shield sitting on top of an arduino uno. I have the code below. The shield just shows me it is connecting but it never shows me it is connected.I want to know why it is not connecting.I will be grateful for any help.Am using arduino 1.0.5 IDE.

#include <GSM.h>

#define PINNUMBER ""
GSM gsmAccess(true);
GSM_SMS sms;

void setup() {
    // initialize serial communications and wait for port to open:
    Serial.begin(9600);
    char code = 'X';
    while(true) {
        Serial.println("try Access");
        code=gsmAccess.begin("",true,false);
        Serial.println("\nAfter Access");

        if(code==GSM_READY){
          Serial.println("connected");
          break;
        }
        if(code==CONNECTING) {
          Serial.println("code is CONNECTING");
        } else {
          Serial.println(code);
          delay(1000);
        } 
    }
}

James James · Accepted Answer · 2014-06-16T12:48:13

You are starting up the modem in asynchronous mode with:

code=gsmAccess.begin("",true,false);

Looking at the GSMBegin documentation, you are going to get a return value of 0 always which does not correspond to the GSM_READY enum type which is 3 I believe. Try:

code=gsmAccess.begin("",true);

Arduino GSM shield not connecting

3 Answers