The TACH pin on the pin-out diagram for the four-wire FAN0 is listed as PA11, this is incorrect and causes Klipper to display an error as PA11 is D- on the board's USB-C port. The correct pin is PD11, I have tested this with a 4-pin Noctua fan and am able to read the rpm using it as expected.
The TACH pin on the pin-out diagram for the four-wire FAN0 is listed as PA11, this is incorrect and causes Klipper to display an error as PA11 is D- on the board's USB-C port. The correct pin is PD11, I have tested this with a 4-pin Noctua fan and am able to read the rpm using it as expected.