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89 lines
2.4 KiB
C++
89 lines
2.4 KiB
C++
/*
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Web client
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This sketch connects to a website (http://www.google.com)
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using an Arduino Wiznet Ethernet shield.
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Circuit:
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* Ethernet shield attached to pins 10, 11, 12, 13
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created 18 Dec 2009
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by David A. Mellis
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modified 9 Apr 2012
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by Tom Igoe, based on work by Adrian McEwen
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*/
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#include <SPI.h>
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#include <Ethernet.h>
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// Enter a MAC address for your controller below.
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// Newer Ethernet shields have a MAC address printed on a sticker on the shield
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byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
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// if you don't want to use DNS (and reduce your sketch size)
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// use the numeric IP instead of the name for the server:
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//IPAddress server(74,125,232,128); // numeric IP for Google (no DNS)
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char server[] = "www.google.com"; // name address for Google (using DNS)
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// Set the static IP address to use if the DHCP fails to assign
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IPAddress ip(192, 168, 0, 177);
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// Initialize the Ethernet client library
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// with the IP address and port of the server
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// that you want to connect to (port 80 is default for HTTP):
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EthernetClient client;
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void setup() {
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// Open serial communications and wait for port to open:
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Serial.begin(9600);
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while (!Serial) {
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; // wait for serial port to connect. Needed for Leonardo only
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}
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// start the Ethernet connection:
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if (Ethernet.begin(mac) == 0) {
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Serial.println("Failed to configure Ethernet using DHCP");
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// no point in carrying on, so do nothing forevermore:
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// try to congifure using IP address instead of DHCP:
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Ethernet.begin(mac, ip);
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}
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// give the Ethernet shield a second to initialize:
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delay(1000);
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Serial.println("connecting...");
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// if you get a connection, report back via serial:
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if (client.connect(server, 80)) {
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Serial.println("connected");
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// Make a HTTP request:
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client.println("GET /search?q=arduino HTTP/1.1");
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client.println("Host: www.google.com");
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client.println("Connection: close");
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client.println();
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}
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else {
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// kf you didn't get a connection to the server:
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Serial.println("connection failed");
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}
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}
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void loop()
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{
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// if there are incoming bytes available
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// from the server, read them and print them:
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if (client.available()) {
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char c = client.read();
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Serial.print(c);
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}
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// if the server's disconnected, stop the client:
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if (!client.connected()) {
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Serial.println();
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Serial.println("disconnecting.");
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client.stop();
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// do nothing forevermore:
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while (true);
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}
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}
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