SIM900 Quad-band GSM/GPRS Shield

Hello, i just bought a GSM/GPRS Shield from ebay http://www.ebay.com/itm/321418410538 .

I have no idea how to get started, as i tried a few codes, including :

// Example 55.2

#include <SoftwareSerial.h>
SoftwareSerial SIM900(7, 8);

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(1000);
  digitalWrite(9, LOW);
  delay(5000);
}

void sendSMS()
{
  SIM900.print("AT+CMGF=1\r");                                                        // AT command to send SMS message
  delay(100);
  SIM900.println("AT + CMGS = \"+23057514278\"");                                     // recipient's mobile number, in international format
  delay(100);
  SIM900.println("Hello, world. This is a text message from an Arduino Uno.");        // message to send
  delay(100);
  SIM900.println((char)26);                       // End AT command with a ^Z, ASCII code 26
  delay(100); 
  SIM900.println();
  delay(5000);                                     // give module time to send SMS
  SIM900power();                                   // turn off module
}

void loop()
{
  sendSMS();
  do {} while (1);
}

I’ve replaced my number in it, but no sms was sent. I don’t even know if my shield is connected to the network, as the NET led is off (PWR is on).

I had a doubt abt the RX and TX pins, so i replaced the SoftwareSerial SIM900(7, 8 ); to SoftwareSerial SIM900(0, 1); but still no luck.

Please a help in sending a sms. :frowning: :’(

Sorry if wrong forum :confused: .

Thanksss…

This looks like a repeat of the thead I answewred last week …

tgsuperspec: This looks like a repeat of the thead I answewred last week .....

Certainly not me, i received my item today itself by dhl.

The Link please?

Thanks

hanish:
Certainly not me, i received my item today itself by dhl.

The Link please?

Thanks

Just search for my posts I don’t have time at present to fnd old link…

Does shield answer, if you send simple AT command?
I´m using this shield rigt now and it works well.

HAD87: Does shield answer, if you send simple AT command? I´m using this shield rigt now and it works well.

It doesn't reply. even tried "AT+IPR=19200" command, no reply.

Check your serial connection. There is jumper on my shield, where you can choose, which pins are You using for communication. If you want to use some other pin (for example I’m using Serial 2 on Arduino mega) you have to connect it by wire. GTX pin on shield to RX pin on arduino and GRX->TX pin.