rabbit-slide-hasumikin-RubyConfPoland2019

The slide for [THE RUBY CONFERENCE OF CRACOW 2019](https://krk-rb.pl/) by [hasumkin](https://github.com/hasumikin) It will cover: - Introducing Ruby for microcontrollers and microcontrollers themselves - Things in common and difference between mruby and mruby/c - How mruby/c works - Development sorroundings - Some actual source code of firmware application