Macro keypad and rotary input based on the ATmega32U4 Pro Micro

Development: https://www.youtube.com/watch?v=g-XJLiv03rI
Assembly process: https://www.youtube.com/watch?v=VwfGT706jW0

Available on Tindie: https://www.tindie.com/products/24327

I2C pins are broken out and arranged for use with SSD1306-based OLED screens
Current program includes diagnostic code for this type of screen.
2 additional GPIO pins, as well as GND and +5V are broken out, giving a total
of 4 GPIO pins that can be used to control external devices (perhaps a small fan)

Uses HID Project software by NicoHood: https://github.com/NicoHood/HID
My previous rotary input project: https://github.com/JeremySCook/RotaryControl