The module can be used as server or client.
The latest version of the Ethernet Shield.
The integrated micro-SD card slot, which can be used to store files for viewing over a network (e.g. the HTML page).
Support access using the SD library.
Wiznet W5100 provides a network (IP) interfaces as well as TCP and UDP.
Supports up to four simultaneous socket connections.
Fits all version of arduino: 2009,UNO, mega 1280, mega 2560.
You have problems with programming if the ethernet shield is connected to the development board?
before his programming. It's a pretty common thing and meet with her for more shieldů. The board is not defective and this is so out of principle. So how to do it?
Once in the Arduino IDE click on the icon "upload program" immediately after press the reset button on Your development board. The Program will then load without any problems.
If you are using the icon "compile + upload the program", keep in mind, that will take some time to compile the code. The reset button is pressed it is necessary to immediately after what data to send to the development board.
In a normal situation with a reset of the old automatically the Arduino IDE, but some of the shields serves, such as the ethernet shield, it can defend itself.