ZigBee


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ZigBee

A wireless network used for home, building and industrial control. It conforms to the IEEE 802.15.4 wireless standard for low data rate networks. With a maximum speed of 250 Kbps at 2.4 GHz, ZigBee is slower than Wi-Fi and Bluetooth, but is designed for low power so that batteries can last for months and years. The typical ZigBee transmission range is roughly 50 meters, but that can vary greatly depending on temperature, humidity and air quality.

Zigzag Like a Bee
Although ZigBee networks can be configured in star, peer-to-peer and mesh topologies, it is the mesh network from which ZigBee was named. A ZigBee mesh provides multiple pathways from device to device (like the Internet) and eliminates a single point of failure. If nodes go down or are removed, ZigBee devices can "zig" and "zag" through the network to their destination like a bumblebee.

Lots of Bees
ZigBee networks are simple control networks that periodically send small packets from sensors to regulate lights, motors and other equipment. A large building can have tens of thousands of ZigBee nodes; a home could have a hundred or more. In fact, ZigBee can address more than a thousand quadrillion devices (surely enough for the gadget fanatic's apartment!).

Reduced Function and Full Function
ZigBee uses two types of devices. Reduced-function devices (RFDs) are sensors that communicate with full-function devices (FFDs). FFDs are complex nodes that conform to the full 802.15.4 standard and can serve as routers. All devices can be implemented with low-cost, 8-bit microcontrollers (MCUs) that derive their power from two AAA batteries. For more information, visit the ZigBee Alliance at www.zigbee.org.
References in periodicals archive ?
A notable number of products are waiting to be certified with this new ZigBee 3.
ZigBee is the only standards-based wireless technology designed to address the unique needs of low-cost, low-power wireless sensor and control networks in just about any market.
Cellnet+Hunt, a promoter member of the ZigBee Alliance, recently demonstrated interoperability of its FOCUS AX ZigBee smart metering interface.
Ember, a developer of wireless semiconductor solutions and "ZigBee Alliance" promotel has agreed to supply Wellspring with its Ember chipset, firmware and advanced development tools for use in Wellspring's next-generation Aqura wireless submetering system, Wellspring will be the first submetering company to adopt ZigBee technology.
Under the terms of the agreement, Atmel will utilize the Figure 8 ZigBee network software stack, allowing Atmel to offer its customers a fully integrated, OEM-ready ZigBee platform.
Meantime if time is hanging heavy until the advent of the ZigBee networked home, take a look at www.