Onboard 5V Fan Port

The C8 features an onboard 5V controllable interface for core heat dissipation. The wiring method is shown in the figure below.

Reference Configuration

[mcu host]                      # FlyOS has already generated a Linux MCU by default; simply define it to use
serial: /tmp/klipper_host_mcu

[temperature_sensor FLY-π]      # Host temperature
sensor_type: temperature_host

[temperature_fan core_fan]      # Host heat dissipation fan
pin: host:gpiochip1/gpio103     # Host fan pin
max_power: 1.0
sensor_type: temperature_host   # Set to host MCU temperature
control:watermark               # Control method
target_temp: 48                 # Host fan activation temperature
min_temp: 0                     # Minimum temperature, below which an error will be reported
max_temp: 90                    # Maximum temperature, above which an error will be reported
off_below: 0.10
kick_start_time: 0.50
max_speed: 0.8                  # Maximum speed, at 80% of full power
min_speed: 0.3                  # Minimum speed, at 30% of full power