The past several years have witnessed a rapid development in the wireless network area. So far wireless networking has been focused on high speed and long range applications. Zigbee technology was developed for a Wireless Personal Area Networks WPAN aimed at control and military applications with low data rate and low power consumption. Zigbee is a standard defines the set of communication protocols for low-data-rate short range wireless networking. Zigbee based wireless devices operate in 868 MHz 915 MHz and 2.4 GHz frequency bands.