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Web Server controlled LED Sketch
/* 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 9 Apr 2012 by Tom Igoe modified 15 Nov 2014 by Soohwan Kim */ #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: #if defined(WIZ550io_WITH_MACADDRESS) // Use assigned MAC address of WIZ550io ; #else byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED}; #endif //#define __USE_DHCP__ IPAddress ip(192,168,1,20); IPAddress gateway( 192, 168, 1, 1 ); IPAddress subnet( 255, 255, 255, 0 ); // fill in your Domain Name Server address here: IPAddress myDns(8, 8, 8, 8); // google puble dns // 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 check_led_status(); // Define the LED PORT NUMBER #define LED_PORT 53 void setup() { // Open serial communications and wait for port to open: Serial.begin(9600); while (!Serial) { ; // wait for serial port to connect. Needed for Leonardo only } // initialize the LED PORT pinMode(LED_PORT, OUTPUT); // initaial value is HIGH digitalWrite(LED_PORT, HIGH); // initialize the ethernet device #if defined __USE_DHCP__ #if defined(WIZ550io_WITH_MACADDRESS) // Use assigned MAC address of WIZ550io Ethernet.begin(); #else Ethernet.begin(mac); #endif #else #if defined(WIZ550io_WITH_MACADDRESS) // Use assigned MAC address of WIZ550io Ethernet.begin(ip, myDns, gateway, subnet); #else Ethernet.begin(mac, ip, myDns, gateway, subnet); #endif #endif // start the Ethernet connection and the server: server.begin(); Serial.println("WebServerControlLED"); 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; String buffer = ""; // Declare the buffer variable while (client.connected()) { if (client.available()) { char c = client.read(); buffer += c; // Assign to the buffer 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(); //client.println("<!DOCTYPE HTML>"); client.println("<html>"); client.println("<body>"); // check the LED status if (digitalRead(LED_PORT)>0){ client.println("LED is <font color='green'>ON</font>"); }else{ client.println("LED is <font color='red'>OFF</font>"); } // generate the Form client.println("<br />"); client.println("<FORM method="get" action="/led.cgi">"); client.println("<P> <INPUT type="radio" name="status" value="1">ON"); client.println("<P> <INPUT type="radio" name="status" value="0">OFF"); client.println("<P> <INPUT type="submit" value="Submit"> </FORM>"); client.println("</body>"); client.println("</html>"); break; } if (c == 'n') { // you're starting a new line currentLineIsBlank = true; buffer=""; } else if ( c == 'r') { //do cgi parser for LED-On if(buffer.indexOf("GET /led.cgi?status=1")>=0){ // cgi action : LED-On digitalWrite(LED_PORT, HIGH); // send web-page client.println("HTTP/1.1 200 OK"); client.println("Content-Type: text/html"); client.println(); client.println("<html>"); client.println("<body>"); // check the LED status if (digitalRead(LED_PORT)>0){ client.println("LED is <font color='green'>ON</font>"); }else{ client.println("LED is <font color='red'>OFF</font>"); } client.println("<br />"); client.println("<a href="/led.htm">Go to control-page</a>"); client.println("</body>"); client.println("</html>"); currentLineIsBlank = false; break; } //do cgi parser for LED-Off if(buffer.indexOf("GET /led.cgi?status=0")>=0){ // action : LED-Off digitalWrite(LED_PORT ,LOW); // send web-page client.println("HTTP/1.1 200 OK"); client.println("Content-Type: text/html"); client.println(); client.println("<html>"); client.println("<body>"); // check the LED status if (digitalRead(LED_PORT)>0){ client.println("LED is <font color='green'>ON</font>"); }else{ client.println("LED is <font color='red'>OFF</font>"); } client.println("<br />"); client.println("<a href="/led.htm">Go to control-page</a>"); client.println("</body>"); client.println("</html>"); currentLineIsBlank = false; break; } } 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"); } }