ZIGBEE -IEEE 802.15.4-
ZigBee is a worldwide open standard for wireless radio networks in the data acquisition, monitoring and control. The standard was developed by the ZigBee Alliance (an association of international companies) to meet the following principal needs:
low cost
ultra-low power consumption
use of unlicensed radio bands (868 MHz - 915 MHz - 2400 MHz)
cheap and easy installation
flexible and extendable networks
integrated intelligence for network set-up and message routing
Some of the above requirements are related - for example, the need for extremely low power consumption is motivated by the use of battery-powered nodes which can be installed cheaply and easily, without any power cabling, in difficult locations.
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