Which pins are used to properly connect the fan to the SBC? I have it running but it seems to be running at full speed all the time. I have the Alta AML-A311D-CC and the LoveRPi Active Cooling Media Center Case.
Any pin with a hardware GPIO PWM: GPIO Pinout Header Maps and Wiring Tool for Libre Computer Boards
The overlays for libretech-wiring-tool might not be there though.