1 | /*
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2 | Web Server
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3 |
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4 | A simple web server that shows the value of the analog input pins.
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5 | using an Arduino Wiznet Ethernet shield.
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6 |
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7 | Circuit:
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8 | * Ethernet shield attached to pins 10, 11, 12, 13
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9 | * Analog inputs attached to pins A0 through A5 (optional)
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10 |
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11 | created 18 Dec 2009
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12 | by David A. Mellis
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13 | modified 9 Apr 2012
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14 | by Tom Igoe
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15 |
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16 | */
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17 |
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18 | #include <SPI.h>
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19 | #include <Ethernet2.h>
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20 |
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21 | // Enter a MAC address and IP address for your controller below.
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22 | // The IP address will be dependent on your local network:
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23 | byte mac[] = {
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24 | 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
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25 | };
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26 | IPAddress ip(192, 168, 1, 177);
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27 |
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28 | // Initialize the Ethernet server library
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29 | // with the IP address and port you want to use
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30 | // (port 80 is default for HTTP):
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31 | EthernetServer server(80);
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32 |
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33 | void setup() {
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34 | // Open serial communications and wait for port to open:
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35 | Serial.begin(9600);
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36 | while (!Serial) {
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37 | ; // wait for serial port to connect. Needed for Leonardo only
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38 | }
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39 |
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40 |
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41 | // start the Ethernet connection and the server:
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42 | Ethernet.begin(mac, ip);
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43 | server.begin();
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44 | Serial.print("server is at ");
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45 | Serial.println(Ethernet.localIP());
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46 | }
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47 |
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48 |
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49 | void loop() {
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50 | // listen for incoming clients
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51 | EthernetClient client = server.available();
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52 | if (client) {
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53 | Serial.println("new client");
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54 | // an http request ends with a blank line
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55 | boolean currentLineIsBlank = true;
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56 | while (client.connected()) {
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57 | if (client.available()) {
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58 | char c = client.read();
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59 | Serial.write(c);
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60 | // if you've gotten to the end of the line (received a newline
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61 | // character) and the line is blank, the http request has ended,
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62 | // so you can send a reply
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63 | if (c == '\n' && currentLineIsBlank) {
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64 | // send a standard http response header
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65 | client.println("HTTP/1.1 200 OK");
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66 | client.println("Content-Type: text/html");
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67 | client.println("Connection: close"); // the connection will be closed after completion of the response
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68 | client.println("Refresh: 5"); // refresh the page automatically every 5 sec
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69 | client.println();
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70 | client.println("<!DOCTYPE HTML>");
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71 | client.println("<html>");
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72 | // output the value of each analog input pin
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73 | for (int analogChannel = 0; analogChannel < 6; analogChannel++) {
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74 | int sensorReading = analogRead(analogChannel);
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75 | client.print("analog input ");
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76 | client.print(analogChannel);
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77 | client.print(" is ");
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78 | client.print(sensorReading);
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79 | client.println("<br />");
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80 | }
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81 | client.println("</html>");
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82 | break;
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83 | }
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84 | if (c == '\n') {
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85 | // you're starting a new line
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86 | currentLineIsBlank = true;
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87 | }
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88 | else if (c != '\r') {
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89 | // you've gotten a character on the current line
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90 | currentLineIsBlank = false;
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91 | }
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92 | }
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93 | }
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94 | // give the web browser time to receive the data
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95 | delay(1);
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96 | // close the connection:
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97 | client.stop();
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98 | Serial.println("client disconnected");
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99 | }
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100 | }
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101 |
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