IR and GSM Based Security System - ARDUINO CODE

#define rxPin 0

#define txPin 1

#define buzz 4

#include <SoftwareSerial.h>

#include <string.h>



void setup()

{
  Serial.begin (9600);

pinMode(rxPin, INPUT);

pinMode(txPin, OUTPUT);

pinMode(buzz, OUTPUT);

}


void loop()

{
int sensorValue = analogRead(A0);

float voltage = sensorValue * (5.0 / 1023.0);
Serial.print(voltage);

Serial.println(" volts");

if (voltage>=2)

{
  digitalWrite(buzz, HIGH);

Serial.println(" cm");
   
Serial.println("AT");
   
delay(2000);
   
Serial.println("AT+CMGF=1");
   
delay(1500);
   
Serial.print("AT+CMGS=");
   
delay(2000);
   
Serial.print((char)34);
   
Serial.print("+9199XXXXX9490");
   
delay(4000);
   
Serial.println((char)34);
   
delay(2000);
   
Serial.println("SECURITY ALERT!");
   
delay(500);
   
Serial.println((char)26);
   
delay(9000);
   
return;
}


else
{
  digitalWrite(buzz, LOW);
 }


 delay(500);
}

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