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Review Details

W5100 Ethernet  Network Module

W5100 Ethernet Network Module

Product Review (submitted on September 10, 2014):
A great module, works very well.

For any one looking for how to work with it, do this:

1) Connect 5v to power this module(you cannot supply 3.3v, since VDD goes to the Voltage Regulator, so you have to supply 5v, despite the fact that the logic is 3.3v)

2) The logic is 3.3v but indeed tollerates 5v.
Connect your arduino like this:
(I'm assuming you use Nano/Pro Mini/Uno and other ATmega328 based Arduinos)
D10: NSS
D13: SCK
That's it, 6 wires and you're connected.

3) Copy the code from this tutorial: http://bildr.org/2011/06/arduino-ethernet-pin-control/
and Compile and Upload it to your Arduino.

That's it, it simply works.