The mouse and the Keyboard form the standard input unit for a Personal computer. The QWERT keyboard which is used in the PC comes with a PS2 connector or USB port connector. The PS2 keyboard uses a simple synchronous serial protocol using only two wires for communication. Due to its simplicity the PS2 keyboards are widely used with simple microcontroller based boards also. The PS2 keyboard always acts as a slave device which can send the equivalent ASCII value of the key which has been pressed to its master device which can be a PC or a microcontroller. The ZigBee is the name of a wireless protocol maintained by the IEEE 802.15 standard. This is a protocol specified for wireless Personal Area Network (PAN) using low powered wireless transceivers. There are already wireless transmitter and receiver modules which can do point to point communication.   

ZigBee is a wireless networking standard that is aimed at remote control and sensor applications which is suitable for operation in harsh radio environments and in isolated locations, It builds on IEEE standard 802.15.4 which defines the physical and MAC layers. Above this ZigBee defines the application and security layer specifications enabling interoperability between products from different manufacturers. In this way ZigBee is a superset of the 802.15.4 specification.With the applications for remote wireless sensing and control growing rapidly it is estimated that the market size could reach hundreds of millions of dollars as early as 2007.This makes ZigBee a very attractive proposition, and one, which warrants the introduction of a focused standard.  

Industrial safety is one of the main aspects of industry specially mining industry. In the mining industry safety is a very vital factor. To avoid loss of material and damaging of human health, protection system as well as faithful communication system is necessary inside the underground mines. To increase both safety and productivity in mines, a reliable communication must be established between workers, moving in the mine, and a fixed base station. Inside mines, the wired communication system is not so effective, because of wires can be damaged inside mines. In this project we are going to monitor the Mine parameters like abnormal gas, temperature and fire sensors to avoid the harmful gas or high temperature attacking the Mine workers. In this  project  to avoid loss of material and damaging of human health in mine workers because of using text to voice converter .The text to voice converter gives continues information inside the mine workers and also cameras are used to video monitoring.

The robot is operated through PC using wireless technology using zigbee and using wireless camera we can view both audio and video on the TV. This robot has a high power LED which acts as a light source when light intensity inside the pipe is low .It is a low cost robot used to monitor the changes of different parameters in the industrial pipes. By connecting temperature sensor to the robot we can get the temperature of dangerous zones in PC itself. By connecting smoke sensor to the robot we can get the information related concentration of smoke or gases in respective fields.

The PS2 mouse is an input device which can communicate with a host device using the PS2 protocol. It can be connected to a host device using the 6 pin mini DIN connector. The mouse will continuously give output which can be decoded to get the movement in the X-Y plane and also the status of the buttons on the mouse. The data read from the mouse can be decoded and processed to get the amount of change in position of the mouse with respect to the position at the previous read. This data is normally used in PCs to move a pointer in the screen. The PS2 protocol is a simple two wire synchronous protocol which makes it possible for the simple microcontroller board to interface the standard PS2 mouse or keyboard with it.This particular project demonstrates how to transmit the data read from a standard PS2 mouse from a microcontroller board to a distant PC.  

The Xbee is the brand name a wireless transceiver device which works on the ZigBee protocol. The ZigBee is the name of a wireless protocol maintained by the IEEE 802.15 standard. This is a protocol specified for wireless Personal Area Network (PAN) using low powered wireless transceivers. They can be used for simple point to point communication systems also. They have an approximate range of 10 to 100 meters and are used in industries, scientific fields, medical fields etc. The Xbee module even though uses complex packet data based Zigbee protocol for communicating with each other, they can communicate with other devices using simplest serial communication protocol and hence they are widely used in microcontroller base boards.This project demonstrates how to interface an Xbee module with the Arduino board and perform a full transmission and reception test between two Xbee modules generally known as loop back test. 

In earlier days the application of the wireless technology was limited mostly to simple point to point communication only replacing the cable based communication systems. The entire communication system itself became complex after the introduction of the computer and communication system based on computers. Several complex networked communication systems like LAN, WAN, PAN etc. came into use. To replace the cable based network communication system with wireless technology demands the design of complex wireless devices and wireless network protocols.The ZigBee is the name of a wireless protocol maintained by the IEEE 802.15 standard. This is a protocol specified for wireless Personal Area Network (PAN) using low powered wireless transceivers. There are already wireless transmitter and receiver modules which can do point to point communication. 

Zigbee has often been regarded as a mini version of Wi-Fi. Keeping some features like range, power consumption apart, zigbee and wi-fi are often used in similar applications in terms of household based wireless communication. These short range wireless technologies even share common ISM band of 2.4GHz, use same spread spectrum technique. Interestingly, both of…

Zigbee is a low power spin off of WiFi. It is a specification for small, low power radios based on IEEE 802.15.4 – 2003 Wireless Personal Area Networks standard. The specification was accepted and ratified by the Zigbee alliance in December 2004.  Zigbee Alliance is a group of more than 300 companies including industry majors like Philips, Mitsubishi Electric, Epson, Atmel, Texas Instruments etc. which are committed towards developing and promoting this standard.  The alliance is responsible for publishing and maintaining the ZIgbee specification and has updated it time and again after making it public for the first time in 2005. Most of the recent devices conform to the Zigbee 2007 specifications has two feature sets– Zigbee and Zigbee Pro. The manufacturers which are members of the Alliance provide software, hardware and reference designs to anyone who wants to build applications using Zigbee.