is a mesh network specification for low-power wireless local area networks
(WLANs) that cover a large area.
ZigBee was designed to provide high data throughput in applications where the duty cycle is low and low power consumption is an important consideration. Because ZigBee is often used in industrial automation and physical plant operation, it is often associated with machine-to-machine (M2M) communication and the Internet of Things (IoT).
ZigBee is based on the Institute of Electrical and Electronics Engineers Standards Association's 802.15 specification. It operates on the IEEE 802.15.4 physical radio specification and in unlicensed radio frequency bands, including 2.4 GHz, 900 MHz and 868 MHz. The specifications are maintained and updated by the ZigBee Alliance.
As of this writing, there are three ZigBee specifications: ZigBee, ZigBee IP and ZigBee RF4CE. ZigBee IP optimizes the specification for IPv6 full mesh networks and ZigBee RF4CE optimizes the specification for partial mesh networks.
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