ZigBee評估套件支持2×2 MIMO

　　隨著以指數(shù)速度增長的機(jī)器對機(jī)器（M2M）應(yīng)用程序的增長，競爭將取決于哪些無線協(xié)議占據(jù)了這個(gè)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(lán)牙?，和一些802.15.4 ZigBee協(xié)議–是其中最重要的–都可以工作。然而，如果您的應(yīng)用需要超低功耗但工作在一個(gè)環(huán)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.