[136] | 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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