热度 14
2012-4-18 09:20
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我们在利用Arduino开发网络服务器的时候,会用到以太网Shield。在其中加入以太网库后,你的设备将能够通过以太网Shield应答HTTP的请求。在打开浏览器并确认你的以太网Shield的IP地址后,你的Arduino将会用足够的HTML来应答浏览器,并让浏览器显示六个模拟针脚的输入值。 需要的硬件 Arduino 以太网 Shield 兼容Shield的 Arduino 板 Circuit 电路 以太网shield能让我们的Arduino通过SPI总线连接到一个WIZnet以太网控制器。以太网shield利用第10、11、12、13针脚来连接WIZnet的SPI。以太网shield的新产品在开发板上含有一个SD卡。数字针脚4是用来控制SD卡上面的slave select针脚。 以太网shield应当连接到一个具有以太网线的网络。你需要在程序中更改网络设置来和网络进行通信。 Arduino会被放置在以太网shield下面 示意图 源代码 /* Web Server A simple web server that shows the value of the analog input pins. using an Arduino Wiznet Ethernet shield. Circuit: * Ethernet shield attached to pins 10, 11, 12, 13 * Analog inputs attached to pins A0 through A5 (optional) created 18 Dec 2009 by David A. Mellis modified 20 Mar 2012 by Tom Igoe */ #include SPI.h #include Ethernet.h // Enter a MAC address and IP address for your controller below. // The IP address will be dependent on your local network: byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; IPAddress ip(192,168,1, 177); // Initialize the Ethernet server library // with the IP address and port you want to use // (port 80 is default for HTTP): EthernetServer server(80); void setup () { Serial.begin(9600); // start the Ethernet connection and the server: Ethernet.begin(mac, ip); server.begin(); Serial.print("server is at "); Serial.println(Ethernet.localIP()); } void loop () { // listen for incoming clients EthernetClient client = server.available(); if (client) { Serial.println("new client"); // an http request ends with a blank line boolean currentLineIsBlank = true; while (client.connected()) { if (client.available()) { char c = client.read(); Serial.write(c); // if you've gotten to the end of the line (received a newline // character) and the line is blank, the http request has ended, // so you can send a reply if (c == ' \n ' currentLineIsBlank) { // send a standard http response header client.println("HTTP/1.1 200 OK"); client.println("Content-Type: text/html"); client.println("Connnection: close"); client.println(); client.println("!DOCTYPE HTML"); client.println("html"); // add a meta refresh tag, so the browser pulls again every 5 seconds: client.println("meta http-equiv= \" refresh \" content= \" 5 \" "); // output the value of each analog input pin for (int analogChannel = 0; analogChannel 6; analogChannel++) { int sensorReading = analogRead(analogChannel); client.print("analog input "); client.print(analogChannel); client.print(" is "); client.print(sensorReading); client.println("br /"); } client.println("/html"); break; } if (c == ' \n ') { // you're starting a new line currentLineIsBlank = true; } else if (c != ' \r ') { // you've gotten a character on the current line currentLineIsBlank = false; } } } // give the web browser time to receive the data delay(1); // close the connection: client.stop(); Serial.println("client disonnected"); } } 英文详细内容请参考: http://arduino.cc/en/Tutorial/WebServer 对于WIZnet的产品,如果您有什么疑问请直接留言也可以登录WIZnet的官网: http://www.wiznettechnology.cn 或者来信:Tel: 86-10-84539974(转166),QQ:2464237212,邮箱:wiznetbj@wiznettechnology.com,联系人:Lily Zhang,谢谢!