项目描述
此项目通过使用Ethernet Shield及Twitter推送来控制一个情景灯。
步骤1：材料
这个项目用到了很少的材料，有很多是不必要的。你也可以改变灯的外形，这样可能会用到更少材料。
电子零件
Arduino Uno R3（我买了一个SainSmart版本，以削减成本） Arduino Ethernet Shield（我在Radio Shack只花了10美金就搞定了） 4个Led 网线 电源适配器 焊锡
装饰材料
亚克力盒子（我在沃尔玛仓储区找到了一个预制的） 少量约1/2英尺厚的木头 橡胶垫脚 木染料 磨砂玻璃喷漆 泡沫塑料（用来放Arduino） 单乙烯基（做一个可在亚克力上喷漆的模具） 钉子 木胶
需要工具
烙铁 电钻 射钉枪 热胶枪 模切绘图机（用于磨具，不必须有）
步骤2：电子器件构建
受电子知识的限制，我尽量将一切简化。我把led灯直接焊接在了Ethernet Shield上。使用了12和13端口。而前后讲Ethernet Shield插入到Arduino对应引脚上。
步骤3：木头盒子
我构建了一个木头盒子，这样亚克力盒子就能放在里面了。并在一面打了一个洞，如此ethernet 线材及供电线材可以透过来。
步骤4：亚克力盒子
我很幸运找到了一个够透的亚克力盒子，你可以尽可能的简化你的构建。我在与木头盒子相对应的位置钻了一个洞，这样线材就可以轻松的插到灯上。
钻完洞，我用磨砂玻璃喷漆给他罩了一层外衣。一旦射出来盒子里的图形光可见。图像就会清晰的看到。
步骤5：泡沫塑料盒子
我用了一个小薄片的泡沫，并把亚克力盒子的开口按进了泡沫。而后在泡沫中留下一个印记，随后就开始切割。根据泡沫上的印记，讲Arduino放到里面，就构建出镶嵌物的位置了。
步骤6：Arduino代码
以下代码是用于Nike Restock 闹钟的代码。你需要更改代码中的ip地址及mac地址。
<p>/*<br> Twitter Client with Strings This sketch connects to Twitter using an Ethernet shield. It parses the XML returned, and looks for this is a tweet You can use the Arduino Ethernet shield, or the Adafruit Ethernet shield, either one will work, as long as it's got a Wiznet Ethernet module on board. This example uses the DHCP routines in the Ethernet library which is part of the Arduino core from version 1.0 beta 1 This example uses the String library, which is part of the Arduino core from version 0019. Circuit: * Ethernet shield attached to pins 10, 11, 12, 13 created 21 May 2011 by Tom Igoe modified by Amanda Ghassaei June 2012http://www.instructables.com/id/Twitter-Controlled-Pet-Feeder/ modified again by cdw181818 December 2014 This code is in the public domain. */#include #include </p><p>//variable to prevent overfeedingboolean nikeRestock = 1;</p><p>// Enter a MAC address and IP address for your controller below.// The IP address will be dependent on your local network:byte mac[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };IPAddress ip(xxx,xxx,xxx,xx; //<<< ENTER YOUR IP ADDRESS HERE</p><p>// initialize the library instance:EthernetClient client;</p><p>const int requestInterval = 60000; // delay between requests = 1min</p><p>char serverName[] = "api.twitter.com"; // twitter URL</p><p>boolean requested; // whether you've made a request since connectinglong lastAttemptTime = 0; // last time you connected to the server, in milliseconds</p><p>String currentLine = ""; // string to hold the text from serverString tweet = ""; // string to hold the tweetboolean readingTweet = false; // if you're currently reading the tweet</p><p>void setup() { pinMode(12, OUTPUT); pinMode(13, OUTPUT); // reserve space for the strings: currentLine.reserve(256); tweet.reserve(150);</p><p>// initialize serial: Serial.begin(9600); // attempt a DHCP connection: if (!Ethernet.begin(mac)) { // if DHCP fails, start with a hard-coded address: Ethernet.begin(mac, ip); } // connect to Twitter: connectToServer(); testing();}</p><p>void loop(){ if (nikeRestock){ if (client.connected()) { if (client.available()) { // read incoming bytes: char inChar = client.read();</p><p> // add incoming byte to end of line: currentLine += inChar; // if you get a newline, clear the line: if (inChar == 'n') { currentLine = ""; } // if the current line ends with , it will // be followed by the tweet: if ( currentLine.endsWith("")) { // tweet is beginning. Clear the tweet string: readingTweet = true; tweet = ""; } // if you're currently reading the bytes of a tweet, // add them to the tweet String: if (readingTweet) { if (inChar != '<') { tweet += inChar; } else { // if you got a "<" character, // you've reached the end of the tweet: readingTweet = false; Serial.println(tweet); if(tweet == ">restock"){ digitalWrite(12, HIGH); digitalWrite(13, HIGH); Serial.println("LED ON!"); delay(360000);//turn on for 1 hour digitalWrite(12, LOW); digitalWrite(13, LOW); nikeRestock = 0; } if(tweet != ">restock"){ digitalWrite(12, LOW); digitalWrite(13, LOW); Serial.println("LED OFF!"); } // close the connection to the server: client.stop(); } } } } else if (millis() - lastAttemptTime > requestInterval) { // if you're not connected, and two minutes have passed since // your last connection, then attempt to connect again: connectToServer(); } } else if (millis() - lastAttemptTime > 14400000){//if four hours has passed since last feeding nikeRestock = 1; }}</p><p>void testing(){ digitalWrite(12, HIGH); digitalWrite(13, HIGH); delay(1000); digitalWrite(12, LOW); digitalWrite(13, LOW);}</p><p>void connectToServer() { // attempt to connect, and wait a millisecond: Serial.println("connecting to server..."); if (client.connect(serverName, 80)) { Serial.println("making HTTP request..."); // make HTTP GET request to twitter: client.println("GET /1/statuses/user_timeline.xml?screen_name=nikestore&count=1 HTTP/1.1"); client.println("HOST: api.twitter.com"); client.println(); } // note the time of this connect attempt: lastAttemptTime = millis();}</p>步骤7：完成
在给Arduino上传程序之后，我把他放到了泡沫垫中，并插上线材。这样就安装好了一个木头盒子。而后在每个角上点一点热熔胶，并盖上亚克力盒子。
剩下的就是在出口那插入电源适配器，并将网线插到路由上。灯会立即点亮，这样就可以开始设置了。接下来就可以等待restock的信息推送了！