Description:

Expansion board is based on Ethernet IC Wiznet W5100, providing an address-based on Network IP includes TCP and UDP protocol stacks. Arduino network expansion board provides four socketsimultaneous connections, canconnect to the Internet byusing the arduino official network library. Arduino can become a simple Web server or you can control the number and analog interface thatreadarduino by network. CandirectlyuseEthernetlibrary filesin the IDE, can be realized with a simple Web server.

Added a mini SD card slot, compatible with TF card.

References:

Design: http://arduino.cc/en/uploads/Main/arduino-ethernet-shield-05-reference-design.zip

Reference entry:http://arduino.cc/en/Guide/ArduinoEthernetShield

Reference Server:http://bildr.org/2011/06/arduino-ethernet-pin-control/

Reference clients:http://bildr.org/2011/06/arduino-ethernet-client/