JC Pro Macro 2 macro keyboard and rotary input, with GPIO breakouts. Uses an ATmega32u4 Pro Micro dev board for HID functionality.
Available now on Tindie: https://www.tindie.com/products/jeremycook/jc-pro-macro-2-rotarygpio-macro-keyboard-kit/
Manual: https://github.com/JeremySCook/JC-Pro-Macro-2/tree/main/documentation