EtherCard
Ardino interface library for the ENC28J60 Ethernet controller chip (GPL).
getViaDNS.ino
// This demo does web requests via DNS lookup, using a fixed gateway.
// 2010-11-27 <jc@wippler.nl>
//
// License: GPLv2
#include <EtherCard.h>
#define REQUEST_RATE 5000 // milliseconds
// ethernet interface mac address
static byte mymac[] = { 0x74,0x69,0x69,0x2D,0x30,0x31 };
// ethernet interface ip address
static byte myip[] = { 192,168,1,203 };
// gateway ip address
static byte gwip[] = { 192,168,1,1 };
// remote website name
const char website[] PROGMEM = "google.com";
byte Ethernet::buffer[300]; // a very small tcp/ip buffer is enough here
static long timer;
// called when the client request is complete
static void my_result_cb (byte status, word off, word len) {
Serial.print("<<< reply ");
Serial.print(millis() - timer);
Serial.println(" ms");
Serial.println((const char*) Ethernet::buffer + off);
}
void setup () {
Serial.begin(57600);
Serial.println("\n[getViaDNS]");
// Change 'SS' to your Slave Select pin, if you arn't using the default pin
if (ether.begin(sizeof Ethernet::buffer, mymac, SS) == 0)
Serial.println( "Failed to access Ethernet controller");
ether.staticSetup(myip, gwip);
if (!ether.dnsLookup(website))
Serial.println("DNS failed");
ether.printIp("Server: ", ether.hisip);
timer = - REQUEST_RATE; // start timing out right away
}
void loop () {
if (millis() > timer + REQUEST_RATE) {
timer = millis();
Serial.println("\n>>> REQ");
ether.browseUrl(PSTR("/foo/"), "bar", website, my_result_cb);
}
}