ZigBee評估套件支持2×2 MIMO

　　隨著以指數速度增長的機器對機器（M2M）應用程序的增長，競爭將取決于哪些無線協議占據了這個空間。和以往一樣，解決辦法取決于問題。對于長途無線2G蜂窩可能最適合的議案。短距離無線Wi-Fi?，藍牙?，和一些802.15.4 ZigBee協議–是其中最重要的–都可以工作。然而，如果您的應用需要超低功耗但工作在一個環境里連接的可靠性可能有問題，Atmel的2.4 GHz reb233smad評估套件（見圖1）值得一看。

　　Figure 1： Atmel REB233SMAD evaluation kit. （Courtesy of Atmel.）

　　The REB233SMAD-EK contains two radio extender boards （REB） based on the Atmel AT86RF233 2.4 GHz RF transceiver; two controller base boards （CBB） built around the ATxmega256A3 MCU; two USB adaptors with cables for programming the MCU; four SMA antennas; plus batteries and a Quick Start Guide. The wireless boards plug into the MCU boards， enabling you to do an immediate range test of two complete wireless nodes using a simple ready to run range measurement application.

　　The kit is designed to be a complete platform for designing and prototyping ZigBee-compliant wireless applications such as ZigBee SmartEnergy and Home Automation systems. To that end， Atmel supplies its BitCloud? stack – a ZigBee? PRO certified platform – and the BitCloud Profile Suite.