HOUSE AUTOMATION USING MOBILE WITH SECURITY SYSTEM

Under the guidance ofMr. T. VENUGOPALAssoc. Prof. ECE Department BY

1. 09J81A0424 2. 09J81A0431

3. 09J81A0450

BRIEF OVERVIEW Embedded system – Introduction, Types,

Features What is House Automation ? Features of House Automation Principle and operation of House Automation Block Diagram of House Automation About Microcontroller AT89S52 Embedded C and KEIL Operation Applications/Advantages/Disadvantages Conclusion Future scope Bibliography

Embedded system - Introduction An Embedded System is one that has computer

hardware with software embedded in it as one of its important components.

Its software embeds in ROM (Read Only Memory). It does not need secondary memories as in a computer.

SOFTWARE PROGRAM

What Makes Embedded System Different ?

Real-Time OperationSizeCostReliabilitySafetyEnergySecurity

History of Embedded System The first recognizably

modern embedded systems was the Apollo Guidance Computer.

It was developed by Charles Stark Draper at the MIT Instrumentation Laboratory in early 1960’s.

It was built from transistor logic and had a hard disk for main memory.

Since these early applications in the 1960’s embedded systems have come down in price and there has been a dramatic rise in processing power and functionality.

CLASSIFICATIONS OF EMBEDDED SYSTEM

1. Small Scale Embedded System

2. Medium Scale Embedded System

3. Sophisticated Embedded System

Components of Embedded System It has Hardware Ex: Timers, Processors,

I/O Devices, Memory, ports. It has main

application software

which may perform

concurrently the series

of tasks or multiple tasks. It has Real Time

Operating System which sets Rules during the

Execution of Application

program.

Processor - The Heart of Embedded System

A Processor is considered as the Heart of Embedded System.

A Processor is a Part of Central Processing Unit that Performs Calculations and other manipulations such as conversion of Program code into form of Binary code (such as 0’s and 1’s) which is acceptable by computer being used.

Two Main Operations of Processor:

Fetch data

Execute data

A Typical Figure of Processor

Embedded Software

• Software C C++ dot net

• Compiler Ride

Keil

•

Simulator Masm

Applications of Embedded SystemHousehold appliances EX: microwave ovens, television,

DVD players and Recorders.

Audio players Integrated systems in

Aircrafts and MissilesCellular TelephonesEngine controllers in

AutomobilesElectronic and

Electric Motor controllers

Medical EquipmentsVideogames

House Automation using Mobile Security Introduction

House automation with mobile refers to the use of computer or mobile and information technology to control home appliances and features (such as windows or lighting).

Systems can range from simple remote control of lighting through to complex computer/micro-controller based networks with varying degrees of intelligence and automation.

Home automation is adopted for reasons of ease, security and energy efficiency.

Why house automation? Technology has surged

now that it has unlocked your potential to control your appliances with out your physical presence.

This project HOUSE AUTOMATION USING MOBILE SECURITY SYSTEM enables us to control Home appliances like Bulbs, Fans, Micro ovens, washing machines, Water Pumps with the Pressing of our Mobile Keys.

Consequently, if you don’t Remember them to Switch OFF them Before you Leave your House, you can Easily do it through your Mobile which Serves as a Remote.

Need for House AutomationSaves TimeSaves Money (long run)Self MaintenanceSecurityMakes the Life Easy

Oven

When: you are in a traffic jam on the high wayWhat : you set microwave oven in a slow cooking mode

Principle of House Automation House Automation using

Mobile mainly consists of three parts – Microcontroller, DTMF(dual tone multiple frequency) decoder and Voice Recording and Play back device.

While on a Call, if a Handset Key is pressed, a Tone Analogous to Key pressed is Heard on the other side.

This Tone Received (DTMF tone) is Processed by the Micro controller with the Aid of a DTMF decoder.

The Decoder further Translates the Tone into corresponding Binary digit and sent to microcontroller to perform corresponding operation.

Block Diagram of House Automation

Power Supply

5v

DTMF

Rx IC

Mobile

Micro Controller

AT89S52

Buzzer

Driver

Relay1

IR pairs

DTMF (Dual – Tone Multi Frequency Signaling)

Dual-tone multi-frequency signaling (DTMF) is used for telecommunication signaling over analog telephone lines in communications devices and the switching center.

The version of DTMF that is used in push-button telephones for tone dialing is known as Touch-Tone.

DTMF tone Dialling system is used by the Push button Keypads in Telephones and Mobile sets to convey the Number or Key dialled by the caller.

DTMF uses a combination of two sine wave Tones to represent a key. These Tones are called Row and Column frequencies as they correspond to layout of Telephone Keypad.

DTMF keypad layout

Relay

A relay is an electrical switch that opens and closes under the control of another electrical circuit.

The switch is operated by an electromagnet to open or close one or many sets of contacts.

A relay is able to control an output circuit of higher power than the input circuit, it can be considered to be, in a broad sense, a form of an electrical amplifier.

A DPDT AC coil relay with "ice cube" packaging

Microcontroller A microcontroller (

abbreviated as µC, uC or MCU) is a small computer on a single integrated circuit containing a processor core, memory, and programmable input/output peripherals.

Program memory in the form of OTP ROM is also often included on chip, as well as a typically small amount of RAM.

Microcontrollers are designed for embedded applications.

Micro controller

Microcontroller AT89S52 The Atmel AT89 series is an

Intel 8051-compatible family of 8 bit microcontrollers (µCs) manufactured by the Atmel Corporation.

The AT89S52 is a low-power, high-performance CMOS 8-bit microcontroller with 8K bytes of in-system programmable Flash memory.

The device is manufactured using Atmel’s high-density non volatile memory technology and is compatible with the industry standard 80C51 instruction set and pin out.

AT89S52 Micro controller

Features of AT89S52 - MCU Compatible with MCS-51 Products 8K Bytes of In-System Programmable (ISP) Flash

Memory Endurance: 1000 Write/Erase Cycles 4.0V to 5.5V Operating Range Fully Static Operation: 0 Hz to 33 MHz Three-level Program Memory Lock 256K Internal RAM 32 Programmable I/O Lines 3 16-bit Timer/Counter Eight Interrupt Sources Full Duplex UART Serial Channel Low-power Idle and Power-down Modes Interrupt Recovery from Power-down Mode Watchdog Timer Dual Data Pointer Power-off Flag

Block Diagram of AT89S52 - MCU

FIG : BLOCK DIAGRAM OF AT89S52

Pin Description of AT89S52

FIG : PIN DIAGRAM OF AT89S52

Embedded C Embedded C is a set of language extensions for the

C Programming language by the C Standards committee to address commonality issues that exist between C extensions for different embedded systems.

Historically, embedded C programming requires nonstandard extensions to the C language in order to support exotic features such as fixed-point arithmetic, multiple distinct memory banks, and basic I/O operations.

In 2008, the C Standards Committee extended the C language to includes a number of features not available in normal C, such as, fixed-point arithmetic, named address spaces, and basic I/O hardware addressing.

Embedded C use most of the syntax and semantics of standard C, e.g., main() function, variable definition, data type declaration, conditional statements (if, switch. case), loops (while, for), functions, arrays and strings, structures and union, bit operations, macros, etc.

Micro vision Keil (IDE) Keil is a cross compiler. Compilers are programs used to convert a High Level Language to object code i.e source code into object code. A cross compiler is similar to the compilers but we write a program for the target processor (like 8051 and its derivatives) on the host processors (like computer) It means being in one environment you are writing a code for another environment is called cross development.  By using this compilers not only can development of complex embedded systems be completed in a fraction of the time, but reliability is improved, and maintenance is easy.

Keil C cross compiler

Keil Software provides software development tools for the family of microcontrollers, they are

• IDE (Integrated Development environment)• Project Manager• Simulator• Debugger• C Cross Compiler , Cross Assembler, Locator/Linker

8051 project development cycle

These are the steps to develop microcontroller project using keil

1. Create source files in C or assembly.2. Compile or assemble source files.3. Correct errors in source files.4. Link object files from compiler and assembler.5. Test linked application.

OPERATION• The project uses a Mobile to control the loads. • The commands are received by the micro controller through level shifted IC. • The DTMF decoder IC is used to decode the DTMF tone from the user. • When any digit is pressed by the user, it will be converted into binary code and then the code is given to the microcontroller. • When the program is executed, it drives relay from the microcontroller through relay driver IC. • Load’s are switched ON and switched OFF based on the corresponding command sent from the keypad. • As per the program, the loads will be turned ON and OFF through the relays.

Advantages of House AutomationConvenience... An automated home is about the convenience of saving your time and effort by having your home automatically do routine functions such as watering your grass (but only if it has not rained recently), or turning off all lights, setting the thermostat to economy mode and arming the security system when you retire for the night.

Security... Home automation is about the security you have knowing that you can look in on your home remotely from anywhere in the world.

Savings... And it’s about the energy savings you will enjoy by assigning your home the responsibility of regulating the operation of lights, water heater, HVAC system, entertainment components, appliances and irrigation system so these devices are on only when needed.

DisadvantagesCosts mainly include equipment,

components, furniture, and custom installation.

Ongoing costs include electricity to run the control systems, maintenance costs for the control and networking systems, including troubleshooting, and eventual cost of upgrading as standards change. Increased complexity may also increase maintenance costs for networked devices.

Control system security may be difficult and costly to maintain.

Applications of House Automation In modern construction in industrialized nations, most

homes have been wired for electrical power, telephones, TV outlets (cable or antenna), and a doorbell.

Control of Home Appliances Home Security Alarm Monitoring Control of home robots, using if necessary domotic electric

beacon. Lighting Control System Motion sensors Magnetic contact sensors for doors / windows Glass break detectors Pressure sensors Presence Simulation Detection of fire, gas leaks and water leaks (see fire alarm

and gas alarm) Medical alert / teleassistance. Precise and safe blind control

Conclusion Home Automation makes our life easier, it makes our

life more comfortable, it saves our energy, it gives us more security .

With a few more changes it can be made a little more advanced for future enhancement. 

Can be used for High voltage A.C Applications by changing the ratings of the Relay.

We can also add some security features in the circuit. Like using password .

In future we can add a multimedia camera to this to see what is going inside the home from somewhere.

The system can be built using field programmable gate array (FPGA) instead of micro controller so that the system can be programmed easily.

Bibliography Home automation

From Wikipedia, the free encyclopedia www.wikipedia.org www.national.com http://thesai.org/Downloads/Volume1No6/Paper_10-

Microcontroller_Based_Home_Automation_System_With_Security.pdf

www.atmel.com www.microsoftsearch.com www.geocities.com