Documentation: GPRS Quadband Module for Arduino Tutorial

   /*
   *  Sending SMS using GPRS module from Libelium for Arduino
   *  Basic program, just sends an SMS
   *  Copyright (C) 2008 Libelium Comunicaciones Distribuidas S.L.
   *  http://www.libelium.com
   *
   *  This program is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  This program is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
   *
   *  Version 0.3
   *  Author: Marcos Yarza 
   */

   int led = 13;
   int onModulePin = 2;        // the pin to switch on the module (without press on button) 

   int timesToSend = 1;        // Numbers of SMS to send
   int count = 0;

   void switchModule(){
   digitalWrite(onModulePin,HIGH);
   delay(2000);
   digitalWrite(onModulePin,LOW);
   }

   void setup(){

   Serial.begin(9600);                // the GPRS baud rate
   delay(2000);
   pinMode(led, OUTPUT);
   pinMode(onModulePin, OUTPUT);
   switchModule();                    // swith the module ON

   for (int i=0;i<5;i++){
      delay(5000);
   } 
   
      Serial.println("AT+CMGF=1");         // set the SMS mode to text
      delay(100);
   }

   void loop(){
   
   while (count < timesToSend){
      delay(1500);
      Serial.println("AT+CMGS=\"*********\""); // send the SMS number
                                             //(change ********* by the actual number)
      delay(1500);
      Serial.print("Hola caracola...");     // the SMS body
      delay(500);
      Serial.write(char(26));             // end of message command 1A (hex)
         
      delay(5000);

      count++;
   }

   if (count == timesToSend){
      Serial.println("AT*PSCPOF");             // switch the module off
      count++;
   }
   }
   

  /*
   *  Making a call using GPRS module from Libelium for Arduino
   *
   *  Basic program, just makes a call
   *
   *
   *  25/08/08 Zaragoza (Spain)
   *
   *  Copyright (C) 2008 M. Yarza 2.008 - 07 - 22 - Zaragoza
   *  www.squidbee.org
   *  www.sensor-networks.org
   *  www.libelium.com
   *
   *  This program is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   * 
   *  This program is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   * 
   *  You should have received a copy of the GNU General Public License
   *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
   *
   */

   int led = 13;
   int onModulePin = 2;        // the pin to switch on the module (without press on button)

   int timesToSend = 1;        // Numbers of calls to make
   int count = 0;

   void testModule(){
   Serial.flush();
   }

   void switchModule(){
   digitalWrite(onModulePin,HIGH);
   delay(2000);
   digitalWrite(onModulePin,LOW);
   }

   void setup(){

   Serial.begin(9600);                // the GPRS baud rate
   delay(2000);
   pinMode(led, OUTPUT);
   pinMode(onModulePin, OUTPUT);
   switchModule();                    // swith the module ON

   for (int i=0;i<5;i++){
      delay(5000);
   } 
   }

   void loop(){
   
   while (count < timesToSend){
      delay(1500);
      Serial.println("ATD*********;");      // ********* is the number to call
      delay(12000);
      Serial.println("ATH");              // disconnect the call
         
      delay(5000);

      count++;
   }
   }