Adding additional steppers to Klipper using Arduino Pro Micro (Atmega32u4) and TMC2209 driver
The problem: I'm building Rat Rig V-Core 3.1 3D printer. This printer requires 6 stepper drivers: three for Z axis, two for XY axes and one for extruder. I also have an unused BTT SKR Mini E3 V3 board lying around, which provides 4 stepper drivers. One