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Bluetooth and ZigBee have much in common. Both are types of IEEE 802.15 "wireless personal-area networks," or WPANs. Both run in the 2.4-GHz unlicensed frequency band, and both use small form factors and low power.

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At the Wireless Communications Alliance's February meeting in Silicon Valley, Bhupender Virk, president and CEO of WPAN components maker CompXs, sorted out the application and technical differences between Bluetooth (IEEE 802.15.1) and the ZigBee specification (based on IEEE 802.15.4), which was ratified in December.

ZigBee protocols define a type of sensor network for residential and commercial applications such as heating, air conditioning and lighting control. It combines IEEE 802.15.4, which defines the physical and MAC protocol layers, with network, security and application software layers as specified by the ZigBee Alliance, a consortium of technology companies.

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Bluetooth protocol is not much encouraged for long duration applications due to power consumption limitations. Hence, for small gadgets which run on battery or limited power source, a new wireless data transfer protocol was needed which could manage working with low power consumption. To fulfill these requirements, a protocol named Zigbee was announced just at the time when Bluetooth was getting popular i.e. in 1999. However, Zigbee caught attention for commercial applications around 2005. Hope I helped u.. Plzz mark as the BRAINLIEST answer..
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