Security Based Alarm System With Arduino Mega 2560

Introduction

 

In this article, I will explain about security-based Alarm Systems with Arduino Mega 2560. It can be used to identify a person who crossed a line without permission. It can be used in many places like schools, homes, hospitals, colleges, industries, etc.

 

Parts

• Arduino Mega 2560.
• PIR Sensor
• GSM Module
• Buzzer 
• LED 

GSM

• GSM means a Global System For Mobile Communication. It is used to send and receive a message in critical areas.
• It can also act as a GSM modem.
• It can have a PIN configuration and MIC is also attached.
   
   
    Figure 1: GSM Board 

PIR Sensor

• It is used to detect people moving around approximately 10m from the sensor.
• The actual range is between 5m to 12m.
• It is of high sensitivity and low noise.
   
   
          Figure 2: PIR Sensor

Connection

 

Step 1 - Arduino Mega 2560 To GSM Board

• Connect the RX pin of the GSM board to the 04 of Arduino Mega 2560.
• Connect the TX pin of the GSM board to the 03 of Arduino Mega 2560.
• Connect the 5V power supply to the Arduino Mega 2560.
• At last, connect the 12 DC voltage to the GSM board. 

Step 2 - Arduino Mega 2560 To PIR Sensor

• In the PIR sensor, they have three pins.
• The first pin can be connected to dc voltage range as 5v.
• The second pin can be connected to the Arduino board 5 in the digital pin. 

Step 3 - Arduino Mega 2560 To LED

• The Anode(+) pin can be connected to the digital pin 7 to an Arduino board.
• The cathode(-) pin can be connected to the Gnd to an Arduino board. 

Step 4 - Arduino mega 2560 To Buzzer

• The red color wire can be connected to the digital pin 10 to the Arduino board.
• The black color wire can be connected to the Gnd to the Arduino board.
• We can connect both the wires in exchange. 

Programming

#include < SoftwareSerial.h >
#include "Timer.h"
const int PIR = 5;
const int TC35TXD0 = 04;
const int TC35RXD0 = 03;
SoftwareSerial mySerial = SoftwareSerial(TC35RXD0, TC35TXD0);
const int siren = 10;
int count;
Timer t;
void setup()
{
    pinMode(testswitch, INPUT);
    pinMode(testled, OUTPUT);
    pinMode(PIR, INPUT);
    pinMode(siren, OUTPUT);
    pinMode(TC35button, OUTPUT);
    mySerial.begin(9600);
    digitalWrite(testled, LOW);
    digitalWrite(siren, LOW);
    digitalWrite(TC35button, HIGH);
    count = 0;
}
void loop()
{
    if (digitalRead(testswitch) == HIGH)
    {
        if (digitalRead(PIR) == HIGH)
        {
            digitalWrite(testled, HIGH);
        } else {
            digitalWrite(testled, LOW);
        }
    }
    if (digitalRead(testswitch) == LOW)
    {
        digitalWrite(testled, LOW);
        delay(15000);
        digitalWrite(siren, HIGH);
        delay(500);
        digitalWrite(siren, LOW);
        delay(15000);
        digitalWrite(siren, HIGH);
        delay(500);
        digitalWrite(siren, LOW);
        delay(500);
        digitalWrite(siren, HIGH);
        delay(500);
        digitalWrite(siren, LOW);
        while (count < 2)
        {
            t.update();
        }
        digitalWrite(TC35button, LOW);
        delay(1000);
        digitalWrite(TC35button, HIGH);
        delay(20000);
        mySerial.print("AT+CMGF=1\r");
        delay(1000);
        mySerial.print("AT+CMGS=\"+xxxxxxxxxxxx\"\r");
        delay(1000);
        mySerial.println("object dected ALERT!");
        mySerial.print("\r");
        delay(1000);
        mySerial.println((char) 26);
        mySerial.println();
        delay(5000);
        digitalWrite(siren, HIGH);
        delay(20000);
        digitalWrite(siren, LOW);
        delay(1800000);
    }
}
void checkPIR()
{
    if (digitalRead(PIR) == HIGH)
    {
        count = count + 1;
    }
}
void clearPIR()
{
    if (count >= 2) {} else
    {
        count = 0;
    }
}

Explanation

• In this article I explained about security of the system.
• It can work or function in the sensor.
• The sensor can be used to monitor the object of a person.
• It can locate the object and sends SMS to mobile. It also raises an alarm.
• It will function under the GSM Module. 

Output

 

 

Figure 3: Output