ZigBee
ZigBee is based on the IEEE 802.15.4 specification for the physical and media access control layers, which support low-powered wireless mesh networking. ZigBee operates on different ISM bands based on region, but mostly on 2.4 GHz worldwide with 915 MHz in the US and 868 MHz in the EU. ZigBee is comprised of a coordinator (ZC), router (ZR), and end devices (ZED). The coordinator automatically initiates the formation of the network. There is only one coordinator in a network and it's generally the trust center for authenticating and validating each device that has joined the network and has a unique network key. The router passes data from other devices and associates routes to end devices.
Routers have to be continually powered in ...
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