International Journal of Engineering and Technology Volume 4 No. 10, October, 2014 ISSN: 2049-3444 © 2014 – IJET Publications UK. All rights reserved. 595 GSM Based Intelligent Home Security System for Intrusion Detection Omorogiuwa Eseosa 1 , Elechi Promise 2 1 Department of Electrical/Electronic Engineering University of Port Harcourt, Port Harcourt, Nigeria 2 Department of Electrical Engineering, Rivers State University of Science and Technology, Port Harcourt, Nigeria ABSTRACT Conventional security systems which are the commonest form of protection to lives and properties, have certain limitations such as real time monitoring and control of activities such as intruders in the form of human beings, fire, smoke, etc. These limitations in most cases result in high financial loss to properties and lives. This work involves design and construction of GSM intelligent home security system for real time monitoring of intruders. It consist of intrusion detection sensors, (pressure, Smoke/Fire, Gas and PIR motion), wireless sensors, programmable microcontroller in embedded C language, regulated power supply unit, proteus (circuit simulator), relays, GSM modem, mobile phone, data acquisition node and an interface program development. The design calculation and analysis was carried out before it was modeled, simulated in proteus electronic simulator environment. When the PIR finds intruders ( in form of variation in temperature, gas leakage, pressure, etc), the relevant sensing device(s) respond and the microcontroller sends encoded alarm signal to the wireless sensor network established in home. The moment the alarm signal is received, it will send alarm short message to the users (owners of the building) through GSM network immediately. The design analysis and calculations were carried out and finally, a positive result was achieved. Keywords: Intruder, Detector, GSM, Intelligent and Security 1. INTRODUCTION In today’s age of digital technology and intelligent systems, home automation has become one of the fastest developing application based technologies in the world. The idea of comfortable living in homes has since changed for the past decade as digital and wireless technologies, are integrated into it. The main concept behind the work is receiving sent Short Message Services (SMS) and processing it further as required to perform several operations. There are several terminologies that are used extensively throughout this paper such as Global System for Mobile Communication (GSM), SMS, etc. It is a service available on most digital mobile phones (also known as text messaging service). Intelligent homes in simple terms can be described as homes that are fully automated in terms of carrying out a predetermined task, providing feed back to the home users and responding accordingly to situations. Intelligent home security systems such as controlled network, and communication systems, emergency response, anti-theft monitoring systems requires automated and controlled system both near and at a distance of control. Intelligent home security systems play important roles in providing an extra layer of security through user authentication to prevent break-ins at entry points and also to track illegal intrusions or activities within the vicinity of the home. There are many researches done in the design of various types of intelligent home security system like sensor-based system that reply and contact-based systems such as finger-print and palm-print scan that requires substantial amount with an input device. Many intelligent home security systems are based on a single system. GSM technology provides the benefit that intelligent home security system is accessible in remote areas as well. This paper is aimed at designing a GSM based intelligent home security system for detecting an intrusion into a monitored area by a passive infrared detector. For home safety, intrusion detector has a transmitter coupled with portable receiver to alert home owners through SMS in situations of break-ins or entering into the home using force. Home security system has been a feature of science fiction writing for many years, but has become practical since the early 20 th century following the widespread introduction of electricity into the home, and rapid advancement of information technology. Early remote control devices began to emerge in the late 1800s for example, Nikola Tesla, patented an idea for remote control of vessels and vehicles (Tesla, 1898) in a research work titled “Method for Controlling Mechanisms of Moving Vessels and Vehicles”. The emergence of electrical home appliances began between 1915 and 1920. More so, the decline in domestic servants meant for the household needed cheap, mechanical replacement. Domestic electricity supply however was still in its infant stage-meaning this luxury was afforded only by the more affluent households as investigated and published by Harper in 2003. Ideas similar to intelligent home security systems originated during the world fairs of the 1930s (Mann, 2005) as reported in the work titled “Smart Technology for Aging, Disability and Independence Depicted Electrified and Automated Homes”. In 1966, Jim Sutherland an engineer working for Westinghouse Electric developed home security system called “ECHO IV”. This was however, a private project