The Ethernet library lets you connect to the Internet or a local network.
Download all files and overwrite onto the"Arduino\libraries\Ethernet" folder in your project in sketch.
Uncomment device(shiel) you want to use.
//Arduino\libraries\Ethernet\utility\w5100.h
#ifndef W5100_H_INCLUDED
#define W5100_H_INCLUDED
#include <avr/pgmspace.h>
#include <SPI.h>
typedef uint8_t SOCKET;
//#define W5100_ETHERNET_SHIELD
//#define W5200_ETHERNET_SHIELD
#define W5500_ETHERNET_SHIELD
//Arduino\libraries\Ethernet\utility\w5100.h
#if defined(W5500_ETHERNET_SHIELD)
#define WIZ550io_WITH_MACADDRESS // Use assigned MAC address of WIZ550io
#include "utility/w5500.h"
#endif
All other steps are the same as the steps from the Arduino Ethernet Shield. You can use examples in ./Ethernet/examples folder for the Arduino IDE 1.5.7, go to Files->Examples->Ethernet, open any example, then copy it to your sketch file and change configuration values properly. After that, you can check if it is work well. For example, if you choose 'WebServer', you should change IP Address first and compile and download it. Then you can access web server page through your web browser of your PC or something.
Initial Release : 15 Jul. 2014