建設一個Arduino無線網關

　　Arduino是一個開源電子原型平臺，專門優化用于接收來自傳感器的輸入。這使得它成為開發無線網關的極好平臺。通過以太網連接，網關可用于將傳感器和執行器連接到因特網上，用于智能手機和平板電腦上。可以為這些平臺開發應用程序，然后利用來自網絡的數據，遠程控制來自世界任何地方的執行器。

　　廣泛的開放源碼軟件提供了建設項目的寶貴資源。它是基于靈活的，易于使用的硬件和軟件為設計師，業余愛好者，和任何人在創造互動的環境感興趣。

　　有一個廣泛的Arduino板可用，使用Arduino編程語言。這是基于布線，具有作為C++的語法和庫，簡化和改進。要使語言簡單易用，有Arduino開發環境，它是基于開源的java IDE的基礎處理。發展可以在PC或Mac和Windows下，主機Mac OSX或Linux，或在董事會本身。網關軟件可以使用Arduino的編程語言和開發工具的Linux。

　　The Arduino Nano board is a small， complete， and breadboard-friendly board based on the ATmega328 processor for the Arduino Nano 3.0 or the ATmega168 for the Arduino Nano 2.x family. It lacks only a DC power jack， and works with a Mini-B USB cable instead of a standard one. The Nano was designed and is currently being produced by Gravitech. The 16 MHz processor runs from a recommended input voltage of 7-12 V and has fourteen digital I/O pins with 40 mA of DC current per pin， which can be used to power a wireless module.

　　There is 16 KB of Flash in the ATmega168 version or 32 KB in the ATmega328 of which 2 KB used by the bootloader. Similarly， there is 1 KB of SRAM and 512 bytes of EEPROM with the ATmega168 or 2 KB of SRAM and 1 KB of EEPROM for the ATmega328.

　　The value of the Arduino boards lies in the range of open source software that has been developed by hobbyists， and also the flexibility of the hardware. Manufacturers provide the circuit layouts， and it is easy to build an add-on card， or shield， to the wireless functions. A wireless shield can be made or bought to add a wireless link to the design.