Ethernet shield - W5100

This is a Ethernet shield based on the Wiznet W5100 ethernet chip,compatible with Arduino Ethernet Shield,added support to Arduino Mega. The different between with Arduino Ethernet Shield just Layout of Ethernet port location. It is based on the Wiznet W5100 ethernet chip providing a network (IP) stack capable of both TCP and UDP. The Arduino Ethernet Shield supports up to four simultaneous socket connections. Use the Ethernet library to write sketches which connect to the internet using the shield.

The latest revision of the shield adds a micro-SD card slot, which can be used to store files for serving over the network. It is compatible with the Arduino Duemilanove and Mega (using the Ethernet library coming in Arduino 0022). An SD card library is not yet included in the standard Arduino distribution, but the sdfatlib by Bill Greiman works well. See this tutorial from Adafruit Industries for instructions (thanks Limor!).

Read more: http://www.elecfreaks.com/store/ethernet-shield-w5100-p-372.html#ixzz2tneNlPWL