Arduino: 1.8.19 (Linux), Board: "HoodLoader2 16u2, DFU + USB-Serial Uno" Sketch uses 3198 bytes (26%) of program storage space. Maximum is 12288 bytes. Global variables use 99 bytes (19%) of dynamic ...

before you begin, make sure you have an Arduino Leonardo R3 ATmega32u4 with a Soldered USB HostShield. This code was designed for my Glorious Model O Mouse, so if it doesn't work with yours, you will ...