CONTENTS

INTRODUCTION WHY HOME AUTOMATION? AIM OF THE PROJECT BLOCK DIAGRAM CIRCUIT DIAGRAM SOFTWARE SIMULATION POWER SUPPLY CKT BLOCK DIAGRAM OF 8051 PIN DESCRIPTION FEATURES OF 8051 LCD DISPLAY RELAYS GSM MODULE GSM MODEM FUTURE ENHANCEMENT CONCLUSION REFERENCES

INTRODUCTION

 Home automation is the use of technology to control basic home  functions and features automatically as well as remotely. An automated home is sometimes called a smart home .

 It makes your everyday tasks in the home simpler, safer, or less expensive.

The idea of comfortable living in home has changed since the past decade as digital , wireless technologies are integrated into it.

WHY HOME AUTOMATION

Home automation is a key to having effective energy efficiency in our house.

There are many home wireless based devices for controlling processes, but they are more expensive.

So here we are using all the basic components that are used in our daily life like cell phones, SIM card, GSM modem etc which make our project cheaper and very simple to use.

PROJECT DESCRIPTION

Aim of the ‘project ‘ is to develop a system based on Embedded micro controller ,which is used for controlling various appliances at home using GSM network and which provides a security feature.

The major hardware interfaces to micro controller are LCD display and a modem(GSM).Also the appliances are interfaced to the micro controller that are to be controlled.

A serial driver IC is used for serial data transmission.

BLOCK DIAGRAM:

Appliance 1

89C51

Micro Controlle

r

GSM

modemRelay2

Relay 1

Appliance 2

RELAY

DRIVER

(ULN2003)

Serial driver

CIRCUIT DIAGRAM:

SOFTWARE SIMULATION

POWER SUPPLY CKT.

BLOCK DIAGRAM OF 8051

PIN DIAGRAM:

FEATURES OF 8051

It is an 8 bit microcontroller. Single +5V operating supply. On chip RAM 128 bites (data memory). On chip ROM 4 Kbytes (flash program memory). On chip oscillator & control circuitry. Four register banks. 32 bit bidirectional I/O pins. Two 16 bit counter/ timer. 16 bit address bus:-it can access 2^16 memory

locations:-64kb (65536) each of RAM and ROM. 8 bit data bus:-it can access 8bit of data in one operation.

LCD DISPLAY

Enable (E)-This line allows access to the display through R/W and RS lines. When this line is low, the LCD is disabled and ignores signals from R/W and RS. When (E) line is high, the LCD checks the state of the two control lines and responds accordingly.

Read/Write (R/W)-This line determines the direction of data between the LCD and microcontroller. When it is low, data is written to the LCD. When it is high, data is read from the LCD.

Register select (RS)-With the help of this line, the LCD interprets the type of data on data lines. When it is low, an instruction is being written to the LCD. When it is high, a character is being written to the LCD.

RELAYS

Relays are electromechanical devices that use an electromagnet to operate a pair of movable contacts from an open position to a closed

position.   The advantage of relays is

that it takes a relatively small amount of power to operate the relay coil, but the relay itself can be used to control motors, heaters, lamps or AC circuits which themselves can draw a lot more electrical power.

GSM MODULE

GSM module is used to establish communication between a microcontroller and a GSM system.

It assembles a GSM modem with standard communication interfaces like RS-232 (Serial Port), USB and power supply.

GSM MODEM

A GSM modem is a specialized type of modem which accepts a SIM card, and operates over a subscription to a mobile operator, just like a mobile phone.

It requires a SIM  card just like mobile phones to activate communication with the network.

It has IMEI number similar to mobile phones for their identification.

The MODEM needs AT commands, for interacting with controller, which are communicated through serial communication. These commands are sent by the controller. The MODEM sends back a result after it receives a command.

Different AT commands supported by the MODEM can be sent by the controller to interact with the GSM cellular network.

FUTURE ENHANCEMENT

It can be used as:• Controlling speed of fan• Controlling room

temperature• Recording our favorite TV

program when we are outside from our home.

It can be used for security proposes

• burglary• gas detection• smoke detection

CONCLUSION

With respect to command via sms that has been sent to the controller via GSM module from phone, command gets interpreted by controller and then activates required switch to control the electrical item.

The proposed model can control all electrical items from anywhere in the world, provided GSM has coverage of the service provider.

REFERENCES:

Management of Home Appliances with Variation in Environment by Aisha Jilani , Sahar Sultan, Intesar Ahmed and Sajjad Rabban

GSM Based Home Automation with Security (Using Microcontroller)Dr. Shaik Meeravali , P. Sai Prasad

Mazidi, Muhammad Ali, the Microcontroller and Embedded System, Second Edition, Prentice Hall, 2007.

THANK YOU!!