The
 main aim of this project is to construct a user friendly multi-language
 communication system for illiterate/dumb people travelling around the 
country. As we have different languages in our country and its 
impossible for us to know all the languages. So, in this project we are 
building a device that helps them in expressing their needs with other 
language people  i.e. request them if we need anything in the 
restaurants like coffee, tea, drinks etc. In
 this project we use Touch screen Technology to make it easy even to 
illiterates as it is also included with images, which indicates the 
needs. This even reduces the difficulty to restaurant people in 
receiving the customers with different languages. Here for wireless 
communication purpose we use Zigbee technology.
ZigBee is a wireless technology developed as an open global standard to address the unique needs of low-cost, low-power, wireless sensor networks. Zigbee is the set of specs built around the IEEE 802.15.4 wireless protocol.
ZigBee is a wireless technology developed as an open global standard to address the unique needs of low-cost, low-power, wireless sensor networks. Zigbee is the set of specs built around the IEEE 802.15.4 wireless protocol.
As
 Zigbee is the upcoming technology in wireless field, we had tried to 
demonstrate its way of functionality and various aspects like kinds, 
advantages and disadvantages using a small application of controlling 
the any kind of electronic devices and machines. The Zigbee technology 
is broadly adopted for bulk and fast data transmission over a dedicated 
channel. 
This
 project consists of Zigbee based system that transmits the wireless 
signals according to the input given by the user using touch screen. At 
the receiver end the information will be displayed on LCD in English 
language. Here when user sends his need through touch screen, then micro
 controller transmits that information through Zigbee transmitter. The 
information received by the Zigbee receiver will be displayed on LCD.  
SOFTWARE AND HARDWARE TOOLS:
Software Tools:
- Kiel compiler
 - Orcad.
 - Proload
 
Hardware Tools:    
- Microcontroller AT89S52.
 - LCD
 - TOUCH PANEL
 - MAX232
 - MULTIPLEXER
 - PC
 - ZIGBEE
 - Buzzer
 
BLOCK DIAGRAM:
RECIEVER SIDE:
TRANSMITTER SIDE: