Advanced low cost voice recognition based smart home/office automation using androidAbstract:Now a days so many useful technologies are coming out to make our life style more comfort, luxurious and secure.

Especially in mobile field so many application are being developed to give us more information and entertainment .this project is designed with combination of two latest and most demanding technologies that are Android and Embedded Systems

Android is a Linux based operating system designed primarily for mobile devices and it is a open source .There are so many applications are already developed on Android and many applications are being developed at free of cost for its users .We can also develop our own customized applications with free of cost or with minimum cost according to our requirements.

In this project we are using an application to control electrical appliances like fan, lights and water pump motors in home or office with voice recognition. Whenever we operate this application, it will wait for voice input for some time and sends recognized voice commands to our controlling system through blue tooth.

At controlling system side we have Bluetooth module, micro controller and load controlling circuits. Whenever this blue tooth module receives command from android application then it transfers this command to micro controller. Micro controller will control the respective loads depends upon the command it received

This is very safe and secure and also we can control many loads without getting confused by adding specific names for each load.

BLOCK DIAGRAM:

Bluetooth module

Software Tools: KEIL IDE for developing micro controller code ORCAD for designing schematics

PROLOAD or FLASH MAGIC for dumping the hex file into controller

Eclipse for developing Android application

Hardware Tools:

AT89S52 Micro controller. MOC3021 for driving RELAYs. BT136 for controlling AC loads.

Blue tooth module

Regulated +5v Power supply.

Advantages: No need of separate remote or switch boards for controlling electrical appliances

Protection from shock while operating

Easy to use, children, old aged people, physically challenged people can also operateApplications: Office automation

Home automation

Machines controlling system in industry

Door access control system Useful for blind people and bed ridden patientsRelay

DRIVER

M

I

C

R

O

C

O

N

T

R

O

L

L

E

R

RESET

Relay

Relay

CRYSTAL

OSCILLATOR

Relay

DRIVER

DRIVER

DRIVER