SMS Based Home Security System

I am sharing brife summary of our final year project. This will be helpful for any one looking for idea to do similar type of project.

Introduction

We have come to fairly modern way of thinking where most of members of family are working these days. This leaves their homes unsecured and raises security concerns regarding their homes. This project aims to deal with those concerns. It consists of an integrated system of SMS along with smoke, LPG gas and intruder sensing sensors. In case any of the events take place, as smoke from fire, leakage of LPG gas or presence of unwanted person, automated system alerts the owner via message using GSM module. This system also makes use of fingerprint module to access the system giving user freedom to use as he wants. Its sole purpose is to make our homes more secured at relatively low cost compared to other high end security systems offered by various security companies. We would like to see this system go in production phase enabling more people to be benefitted.

Objectives 

 The objective of this project is to design a sytem that can detect smoke,gas leakage and intruder inside a house and alert the house owner through SMS.
 To develop a system which could turn off the mains by SMS from the house owner.

Applications
The major applications of our project are as follows:
 Houses
 Banks
 Shops

METHODOLOGY
This system is fully controlled by the Arduino which will continuously monitor the sensors and modules. Whenever the house owner leaves the house, owner has to switch on the system and if someone has to enter the house the system needs to be deactivated using one of previously recorded fingerprint. This prohibits any unauthorized entry in the house as unauthorized access will trigger the alarm along with SMS to the owner’s cellphone through GSM module. In case of trespassing or forced entry the PIR sensor senses the movement, which makes system to alarm a buzzer and send SMS to the owner. So is in the situation of leakage of LPG gas or smoke in the house. In case of fire, the main switch is turned off by receiving the correct SMS sent by the owner.

Hardware required
Hardware of the system contains sensors like LPG sensor, PIR sensor, gas sensor, buzzer, GSM sim900, and fingerprint module and Arduino Uno.

Software required

The Arduino software (IDE) is used, and start linker with coding
and electronic. The Ardunio software consists of an inbuilt library which makes the user very easy to use. It consist of series of libraries codes that makes it easy for us to connect to a sensor, display, module etc. The Proteus Design Suite is a Windows application for schematic capture, simulation, and PCB layout design. The micro-controller simulation in Proteus works by applying either a hex file or a debug file to the microcontroller part on the schematic. It is then co-simulated along with any analog and digital electronics connected to it.

Simulation Results
Before implementing on hardware we used Proteus software to simulate the system. Since Proteus lacks many real world objects, the objects were replaced by toggel logic to make the simulation effective. Due to the unavailability of fingerprint module on proteus we could not simulate, however we have connected all other components such as PIR sensor, LPG/smoke sensor, GSM module and buzzer. Basically role of fingerprint module was to deactivate the whole system which we could not show it on Proteus simulation.

Fig circuit diagram for simulation

Hardware Results
In this project we have used PIR sensor to detect the movement and MQ-2 sensor to sense the smoke and gas. We found that both the sensors were very sensitive and works in almost in real time .We also have connected fingerprint module for deactivating the system. The experiment was carried out by interfacing the relay module, PIRsensor, GSM module,Mq2
sensor,,LED, buzzer and fingerprint module with Arduino Uno board. Alert alarm and SMS was trigerred whenever any movement ,smoke or gas leakage,or wrong fingerprint was encounterd by the system.Since this system is two way systems we could send sms to control main switch of the house using relay module. For checking the working of the system we moved the object in front of the PIR sensor and, supplied gas and smoke using lighter. In Figure we have shown output of serial reading of sensors and Finger print module in which enrolled finger print id has shown by finger print match with its unique id and finger print not match has been shown with didn’t match and the screenshot of the reading.

Fig 4.2 Serial output

The AT commands for GSM support is as follows:
• +CMGS: To send the message
• +CMSS: To Send Message from Storage
• +CMGR: Read Message

For More Details Information of the Project. Feel free to contact me.