This board is a nice upgrade for my 3D printer. I am using Klipper firmware with TMC2209 stepper drivers and sensorless homing. Once I had everything configured, I found that the board was unable to communicate with the stepper drivers (I kept getting the "Unable to read tmc uart 'stepper_x' register IFCNT" error). Turns out that this board requires the PC13 pin to be high in order for the stepper controllers to be powered up. This is a safety feature that works in conjunction with Marlin for the situation where a stepper driver is inserted wrong. Klipper, on the other hand, has no knowledge of this.The following lines in the klipper config bring the stepper motor controllers online:[output_pin motor_power]pin: PC13value: 1Once that was in place, this board works like a dream! Very happy with it.
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