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+/*
+ 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
+
+ */
+
+#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() {
+ // Open serial communications and wait for port to open:
+ Serial.begin(9600);
+ while (!Serial) {
+ ; // wait for serial port to connect. Needed for Leonardo only
+ }
+
+
+ // 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("Connection: 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");
+ }
+}
+