Arduino系統網絡選項

　　加入有線或無線網絡功能的Arduino開源硬件/軟件平臺是簡單的，廉價的，并打開了另一個世界的商業和DIY開發者的應用（圖1）。本文介紹網絡Arduino系統，我們將探討如何添加一個以太網，Wi-Fi，或802.15接口的基于Arduino的設計。（注：讀者熟悉Arduino可以參照高新區第“Arduino開源平臺釋放了創造力。”）

　　Figure 1： The Arduino module controlling the RobotShop Rover receives programming and commands from a host PC using its integrated USB connection. An XBee 2.4 GHz 802.15 transceiver shield can be added for wireless remote control and sensing.

　　Born to network

　　In truth， virtually every Arduino device has some sort of communication capability. At its most basic level， a board must provide some means for its PC-based development system to upload application software and to exchange debug/trace commands. Many Arduino boards （such as the Uno and the Mega2560 have an integrated USB port that serves as both a host communication link and as a low-power power supply. Some specialized boards forego the luxury of a USB connection and fall back on the Atmel ATmega AVR processor’s serial communication capabilities to provide an RS-232 （or equivalent） link that can be read by nearly any device with a serial port.