The Arduino Ethernet Shield 2 connects your Arduino to the internet in minutes. Simply connect this module to your Arduino board, connect it to your network with an RJ45 cable (not included), and follow a few simple steps to start controlling your world through the Internet. As always with Arduino, every element of the platform, hardware, software, and documentation is freely available and open source. This means you can learn exactly how it is built and use its design as a starting point for your own circuits.