Picoruby and PRK Firmware by Hitoshi Hasumi PicoRuby is an alternative implementation of the mruby interpreter which runs on one-chip microcontrollers. PRK Firmware is the world's first keyboard firmware framework in Ruby. You can write not only your own "keymap" in PicoRuby but also configure additional behavior with Ruby's features such as the open class system and the Proc object. The ultimate goal is certainly not a small one --- let's make Ruby comparable to projects such as MicroPython, CircuitPython or Lua in terms of viability as a scripting language on Board!