1 | /*
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2 | Repeating Web client
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3 |
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4 | This sketch connects to a a web server and makes a request
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5 | using a Wiznet Ethernet shield. You can use the Arduino Ethernet shield, or
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6 | the Adafruit Ethernet shield, either one will work, as long as it's got
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7 | a Wiznet Ethernet module on board.
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8 |
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9 | This example uses DNS, by assigning the Ethernet client with a MAC address,
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10 | IP address, and DNS address.
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11 |
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12 | Circuit:
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13 | * Ethernet shield attached to pins 10, 11, 12, 13
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14 |
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15 | created 19 Apr 2012
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16 | by Tom Igoe
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17 | modified 21 Jan 2014
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18 | by Federico Vanzati
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19 |
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20 | http://arduino.cc/en/Tutorial/WebClientRepeating
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21 | This code is in the public domain.
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22 |
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23 | */
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24 |
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25 | #include <SPI.h>
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26 | #include <Ethernet2.h>
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27 |
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28 | // assign a MAC address for the ethernet controller.
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29 | // fill in your address here:
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30 | byte mac[] = {
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31 | 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
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32 | };
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33 | // fill in an available IP address on your network here,
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34 | // for manual configuration:
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35 | IPAddress ip(192, 168, 1, 177);
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36 |
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37 | // fill in your Domain Name Server address here:
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38 | IPAddress myDns(1, 1, 1, 1);
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39 |
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40 | // initialize the library instance:
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41 | EthernetClient client;
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42 |
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43 | char server[] = "www.arduino.cc";
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44 | //IPAddress server(64,131,82,241);
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45 |
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46 | unsigned long lastConnectionTime = 0; // last time you connected to the server, in milliseconds
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47 | const unsigned long postingInterval = 10L * 1000L; // delay between updates, in milliseconds
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48 | // the "L" is needed to use long type numbers
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49 |
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50 | void setup() {
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51 | // start serial port:
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52 | Serial.begin(9600);
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53 | while (!Serial) {
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54 | ; // wait for serial port to connect. Needed for Leonardo only
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55 | }
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56 |
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57 | // give the ethernet module time to boot up:
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58 | delay(1000);
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59 | // start the Ethernet connection using a fixed IP address and DNS server:
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60 | Ethernet.begin(mac, ip, myDns);
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61 | // print the Ethernet board/shield's IP address:
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62 | Serial.print("My IP address: ");
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63 | Serial.println(Ethernet.localIP());
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64 | }
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65 |
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66 | void loop() {
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67 | // if there's incoming data from the net connection.
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68 | // send it out the serial port. This is for debugging
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69 | // purposes only:
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70 | if (client.available()) {
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71 | char c = client.read();
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72 | Serial.write(c);
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73 | }
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74 |
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75 | // if ten seconds have passed since your last connection,
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76 | // then connect again and send data:
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77 | if (millis() - lastConnectionTime > postingInterval) {
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78 | httpRequest();
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79 | }
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80 |
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81 | }
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82 |
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83 | // this method makes a HTTP connection to the server:
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84 | void httpRequest() {
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85 | // close any connection before send a new request.
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86 | // This will free the socket on the WiFi shield
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87 | client.stop();
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88 |
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89 | // if there's a successful connection:
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90 | if (client.connect(server, 80)) {
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91 | Serial.println("connecting...");
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92 | // send the HTTP PUT request:
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93 | client.println("GET /latest.txt HTTP/1.1");
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94 | client.println("Host: www.arduino.cc");
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95 | client.println("User-Agent: arduino-ethernet");
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96 | client.println("Connection: close");
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97 | client.println();
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98 |
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99 | // note the time that the connection was made:
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100 | lastConnectionTime = millis();
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101 | }
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102 | else {
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103 | // if you couldn't make a connection:
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104 | Serial.println("connection failed");
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105 | }
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106 | }
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107 |
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108 |
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