There are two methods that you can use to install this BSP. We highly recommend the first option unless you wish to participate in active development of this codebase via Github.
Bootloader for Arduino with Ethernet This is a beta stage bootloader for Arduino Ethernet board and the regular Arduino with Ethernet Shield. It is based on previous unfinished work by the Arduino ...
While newer Arduinos and Arduino compatibles (including the Hackaday.io Trinket Pro. Superliminal Advertising!) either have a chip capable of USB or rely on a V-USB implementation, the old fogies of ...