1 | /*
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2 | Web client
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3 |
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4 | This sketch connects to a website (http://www.google.com)
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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 |
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10 | created 18 Dec 2009
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11 | by David A. Mellis
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12 | modified 9 Apr 2012
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13 | by Tom Igoe, based on work by Adrian McEwen
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14 |
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15 | */
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16 |
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17 | #include <SPI.h>
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18 | #include <Ethernet2.h>
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19 |
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20 | // Enter a MAC address for your controller below.
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21 | // Newer Ethernet shields have a MAC address printed on a sticker on the shield
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22 | byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
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23 | // if you don't want to use DNS (and reduce your sketch size)
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24 | // use the numeric IP instead of the name for the server:
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25 | //IPAddress server(74,125,232,128); // numeric IP for Google (no DNS)
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26 | char server[] = "www.google.com"; // name address for Google (using DNS)
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27 |
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28 | // Set the static IP address to use if the DHCP fails to assign
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29 | IPAddress ip(192, 168, 0, 177);
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30 |
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31 | // Initialize the Ethernet client library
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32 | // with the IP address and port of the server
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33 | // that you want to connect to (port 80 is default for HTTP):
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34 | EthernetClient client;
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35 |
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36 | void setup() {
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37 | // Open serial communications and wait for port to open:
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38 | Serial.begin(9600);
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39 | while (!Serial) {
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40 | ; // wait for serial port to connect. Needed for Leonardo only
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41 | }
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42 |
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43 | // start the Ethernet connection:
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44 | if (Ethernet.begin(mac) == 0) {
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45 | Serial.println("Failed to configure Ethernet using DHCP");
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46 | // no point in carrying on, so do nothing forevermore:
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47 | // try to congifure using IP address instead of DHCP:
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48 | Ethernet.begin(mac, ip);
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49 | }
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50 | // give the Ethernet shield a second to initialize:
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51 | delay(1000);
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52 | Serial.println("connecting...");
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53 |
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54 | // if you get a connection, report back via serial:
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55 | if (client.connect(server, 80)) {
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56 | Serial.println("connected");
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57 | // Make a HTTP request:
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58 | client.println("GET /search?q=arduino HTTP/1.1");
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59 | client.println("Host: www.google.com");
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60 | client.println("Connection: close");
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61 | client.println();
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62 | }
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63 | else {
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64 | // kf you didn't get a connection to the server:
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65 | Serial.println("connection failed");
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66 | }
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67 | }
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68 |
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69 | void loop()
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70 | {
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71 | // if there are incoming bytes available
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72 | // from the server, read them and print them:
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73 | if (client.available()) {
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74 | char c = client.read();
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75 | Serial.print(c);
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76 | }
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77 |
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78 | // if the server's disconnected, stop the client:
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79 | if (!client.connected()) {
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80 | Serial.println();
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81 | Serial.println("disconnecting.");
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82 | client.stop();
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83 |
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84 | // do nothing forevermore:
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85 | while (true);
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86 | }
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87 | }
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88 |
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