How to turn on GPRS SIM900 module?

Projects Networking, Protocols, and Devices
1

I'm trying to turn on GPRS Sim900 to communicate with UNO. When I trying to turn on GPRS shield using uno pin 9 It is not turning on. I have set Rx tx according to my program. eventhough it is not working.

product page - http://imall.iteadstudio.com/im120417009.html

coding:

// Example 55.1

#include <SoftwareSerial.h>
SoftwareSerial SIM900(0, 1); // configure software serial port

void setup()
{
SIM900.begin(19200);
SIM900power();
delay(20000); // give time to log on to network.
}

void SIM900power()
// software equivalent of pressing the GSM shield "power" button
{
digitalWrite(9, HIGH);
delay(400);
digitalWrite(9, LOW);
delay(5000);
}

void callSomeone()
{
SIM900.println("ATD + +9197904025439;"); // dial US (212) 8675309
delay(100);
SIM900.println();
delay(30000); // wait for 30 seconds...
SIM900.println("ATH"); // hang up
}

void loop()
{
callSomeone(); // call someone
SIM900power(); // power off GSM shield
do {} while (1); // do nothing
}

2

I can't see where you set pin 9 for output. Try:

void SIM900power()
{
  pinMode(9, OUTPUT); 
  digitalWrite(9,LOW);
  delay(1000);
  digitalWrite(9,HIGH);
  delay(2000);
  digitalWrite(9,LOW);
  delay(3000);
}

which works for me.

Also don't use SoftwareSerial on pins 0 & 1, they are used for serial communication via the USB port. With that shield you have so many others to choose from.

3

yeah thank you it is working