MySensors Ethernet Gateway RPi form-factor (W5100 module)

https://www.openhardware.io/view/37/MySensors-Ethernet-Gateway-RPi-form-factor-W5100-module#tabs-instructions

MySensors Ethernet Gateway based on Arduino Nano. The board is designed as Raspberry Pi form factor. I need this design for fitting a MySensors Gateway in a custom build RPi cluster using the same power supply.

There are two versions of the board. One for the standard widely available W5100 module (this project) and one for the more expensive and harder te get WI811MJ of WIZnet (other project)