Home security has been a major issue where crime is increasing and everybody wants to take proper measures to prevent intrusion. In addition, there is need to automate home so that the user can take the advantage of technological advancement. This project presents a model that will provide security to their home, office or cabin etc via SMS using GSM technology.
Keeping in view the rapid growth of wireless communication we are inspired to work on this project. The idea behind this project is to meet the upcoming challenges of the modern practical applications of wireless communication and to facilitate our successors with such splendid ideas that should clear their concept about wireless communication and control system.
The applications of SMS/GSM Based security system are quite diverse. There are many real life situations that require control of different devices remotely and to provide security. There will be instances where a wired connection between a remote appliance/device and the control unit might not be feasible due to structural problems. In such cases a wireless connection is a better option.
Basic Idea of our project is to provide GSM Based security even if the owner is away from the restricted areas. For this we adopted wireless mode of transmission using GSM. Beside this there are many methods of wireless communication but we selected GSM in our project because as compared to other techniques, this is an efficient and cheap solution also, we are much familiar with GSM technology and it is easily available.
This project is designed to provide ubiquitous access to the system for the security using extensive GSM technology for communication purposes and microcontroller for device control. The highlights of our system are the long range of communication and password security. The security is provided by sending a message to our access number, controlling and acknowledgement is done through SMS code between our access number and the authenticated user.
This system consists of a GSM modem for sending and receiving the SMS, Intel 89S52 microcontroller which is controlling the entire system, LCD for the display purpose , keypad for entering the password and supporting circuitries like rectifier for ac to dc conversion. It can be installed at any desired location e.g., office (to protect important files and document), banks (to protect cash in locker) etc.
In this system, the authorized person will have the entire control and he will decide which people will be allowed in that restricted area. Those person who can have access to that area, will have a password in advance. If any one wants to enter in that restricted area in the absence of authorized person, then that person will enter the password on the keypad. If the password will be correct, then a message containing the details like name, address and designation etc. of that person will be forwarded to authorized person via GSM Modem. Now the authorized person will send a coded reply to the microcontroller via GSM Modem. Depending upon the response from the authorized person, microcontroller will decide whether to permit or not. If the approval will be positive then the controller will turn on the relay connected to the door and the authenticated user will be in a position to have access to that area else the request will be rejected and the door will not open. The GSM modem provides the communication mechanism between the user and the microcontroller system by means of SMS messages.
The microcontroller is an exiting, challenging, and growing field; it will pervade industry for decades to come. To meet the challenges of this growing technology, we will have to conversant with the programmable aspect of the microcontroller. Programming is a process of problem solving and communicating in a strange language of mnemonics. The projects could be developed significantly faster and much easily using a microcontroller.
The purpose of this project is to implement the various concepts of microcontroller and embedded designing environment. An embedded microcontroller is a chip which has a computer processor with all its support functions (clock & reset), memory (both program and data), and I/O (including bus interface) built into the device. These built in functions minimize the need for external circuits and devices to be designed in the final application.
The aim of this project is to provide security to the restricted area even if the owner is anywhere in the world. For this purpose user can use any type of Mobile. This way it overcomes the limited range of infrared and radio remote controls.
Short Message Service (SMS) is defined as a text-based service that enables up to 160 characters to be sent from one mobile phone to another. In a similar vein to email, messages are stored and forwarded at an SMS centre, allowing messages to be retrieved later if you are not immediately available to receive them. Unlike voice calls, SMS messages travel over the mobile network’s low-speed control channel.
"Texting", as its also known, is a fast and convenient way of communicating. In fact, SMS has taken on a life of its own, spawning a whole new shorthand language that’s rapidly being adopted as the norm.
As microcontrollers are the core of the todays digital circuit design in industry, this system uses it for the centralized operation and digital processing.
The technology used here is embedded technology which is the future of today’s modern electronics.
Here we have used a very high speed Microcontroller i.e. 89S52. This runs on 6-clk cycle period instead of 12-clk cycle. This makes the communication rate faster at 115200kbps. Since we are using F-Bus protocol with the mobile, a full duplex communication with the above baud rate is required.
The following are the prominent features of “SMS based security system”
· Can provide security to 8-devices,
· User-programmable plain text message control,
· Communicate from any other mobile,
· Password protected,
· Can be controlled from anywhere, anytime,
· In-system programmable i.e. we can modify the code of the Controller at anytime depending upon our requirement without taking out the controller from the board.
What contributions would the project make?
· If this system is installed in an office cabin where all important files (share paper, tender files or other files) are kept and the owner is in away from the place (e.g., London) attending a meeting and at the same day he is supposed to submit a tender. In this case he can allow any of his trustworthy employees and get the work done. In this way he will be saved from the bearing a heavy loss.
· This system can be used for home automation too with desired changes in the program and by some additional hardware.
· If you need to turn pumps, lights etc. on remotely or need to remotely monitor equipment alarms then this project is for you.
· There are thousands of uses, like turning on remote pumps, lights, monitoring cool room temperatures, open doors etc.