Ethernet Controlled LED

1#include <SPI.h>
2#include <Ethernet.h>
3
4// MAC address for shield
5byte  mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
6EthernetServer server(80); //  Using port 80
7int led = 7; // LED attached to pin 7
8void setup() {
9  pinMode(led,  OUTPUT); // Led set as an output
10  Ethernet.begin(mac); // Start the Ethernet  shield
11  server.begin();
12  Serial.begin(9600); // Start serial communication
13  Serial.println("Server address:"); // Print server address
14  // (Arduino  shield)
15  Serial.println(Ethernet.localIP());
16}
17void loop() {
18  EthernetClient  client = server.available();
19  if (client) {
20    boolean currentLineIsBlank  = true;
21    String buffer = "";
22    while (client.connected()) {
23      if  (client.available()) {
24        char c = client.read(); // Read from the Ethernet  shield
25        buffer += c; // Add character to string buffer
26        // Client  sent request, now waiting for response
27        if (c == '\n' && currentLineIsBlank)  {
28          client.println("HTTP/1.1 200 OK"); // HTTP response
29          client.println("Content-Type:  text/html");
30          client.println(); // HTML code
31          client.print("<center><br><h1>Internet  Controlled Led </h1><br><br><br><FORM>");
32          client.print("<P> <INPUT  type=\\"submit\\" name=\\"status\\" value=\\"ON\\">");
33          client.print("<P>  <INPUT type=\\"submit\\" name=\\"status\\" value=\\"OFF\\">");
34          client.print("</FORM></center>");
35          break;
36        }
37        if (c == '\n') {
38          currentLineIsBlank  = true;
39          buffer = "";
40        }
41        else if (c == '\r')  { // Command from webpage
42          // Did the on button get pressed
43          if  (buffer.indexOf("GET /?status=ON") >= 0)
44            digitalWrite(led, HIGH);
45          // Did the off button get pressed
46          if (buffer.indexOf("GET  /?status=OFF") >= 0)
47            digitalWrite(led, LOW);
48        }
49        else  {
50          currentLineIsBlank = false;
51        }
52      }
53    }
54    client.stop(); // End server
55  }
56}

1#include <SPI.h>
2#include <Ethernet.h>
3
4// MAC address for shield
5byte
6  mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
7EthernetServer server(80); //
8  Using port 80
9int led = 7; // LED attached to pin 7
10void setup() {
11  pinMode(led,
12  OUTPUT); // Led set as an output
13  Ethernet.begin(mac); // Start the Ethernet
14  shield
15  server.begin();
16  Serial.begin(9600); // Start serial communication
17
18  Serial.println("Server address:"); // Print server address
19  // (Arduino
20  shield)
21  Serial.println(Ethernet.localIP());
22}
23void loop() {
24  EthernetClient
25  client = server.available();
26  if (client) {
27    boolean currentLineIsBlank
28  = true;
29    String buffer = "";
30    while (client.connected()) {
31      if
32  (client.available()) {
33        char c = client.read(); // Read from the Ethernet
34  shield
35        buffer += c; // Add character to string buffer
36        // Client
37  sent request, now waiting for response
38        if (c == '\
39' && currentLineIsBlank)
40  {
41          client.println("HTTP/1.1 200 OK"); // HTTP response
42          client.println("Content-Type:
43  text/html");
44          client.println(); // HTML code
45          client.print("<center><br><h1>Internet
46  Controlled Led </h1><br><br><br><FORM>");
47          client.print("<P> <INPUT
48  type=\\"submit\\" name=\\"status\\" value=\\"ON\\">");
49          client.print("<P>
50  <INPUT type=\\"submit\\" name=\\"status\\" value=\\"OFF\\">");
51          client.print("</FORM></center>");
52
53          break;
54        }
55        if (c == '\
56') {
57          currentLineIsBlank
58  = true;
59          buffer = "";
60        }
61        else if (c == '\
')
62  { // Command from webpage
63          // Did the on button get pressed
64          if
65  (buffer.indexOf("GET /?status=ON") >= 0)
66            digitalWrite(led, HIGH);
67
68          // Did the off button get pressed
69          if (buffer.indexOf("GET
70  /?status=OFF") >= 0)
71            digitalWrite(led, LOW);
72        }
73        else
74  {
75          currentLineIsBlank = false;
76        }
77      }
78    }
79
80    client.stop(); // End server
81  }
82}