Send and Receive SMS using arduino and GSM shield sim900.

by admin

Hi

Please prepare the circuit as shown in image.

gsm sim-900
gsm sim-900

code:

#include "SIM900.h"
#include
//If not used, is better to exclude the HTTP library,
//for RAM saving.
//If your sketch reboots itself proprably you have finished,
//your memory available.
//#include "inetGSM.h"

//If you want to use the Arduino functions to manage SMS, uncomment the lines below.
#include "sms.h"
SMSGSM sms;

//To change pins for Software Serial, use the two lines in GSM.cpp.

//GSM Shield for Arduino
//www.open-electronics.org
//this code is based on the example of Arduino Labs.

//Simple sketch to send and receive SMS.

int numdata;
boolean started=false;
char smsbuffer[160];
char n[20];

void setup()
{
//Serial connection.
Serial.begin(9600);
Serial.println("GSM Shield testing.");
//Start configuration of shield with baudrate.
//For http uses is raccomanded to use 4800 or slower.
if (gsm.begin(2400)) {
Serial.println("\nstatus=READY");
started=true;
} else Serial.println("\nstatus=IDLE");

if(started) {
//Enable this two lines if you want to send an SMS.
if (sms.SendSMS("+919036634994", "Arduino SMS"))
Serial.println("\nSMS sent OK");
}

};

void loop()
{
if(started) {
//Read if there are messages on SIM card and print them.
/** deprecated method
if(gsm.readSMS(smsbuffer, 160, n, 20)) {
Serial.println(n);
Serial.println(smsbuffer);
}
**/
//get 1st sms
sms.GetSMS(1,n,20,smsbuffer,160);
Serial.println(n);
Serial.println(smsbuffer);
delay(1000);
}
};


        

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