Onboard 5V Fan Interface

Onboard 5V Fan Wiring

• The Pi-V2 board features an onboard controllable 5V interface for mainboard cooling. The wiring method is shown in the figure below.

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Reference Configuration

[mcu host]                      # FlyOS has automatically generated a Linux MCU for you; define it to use it.
serial: /tmp/klipper_host_mcu 

[temperature_sensor FLY-Pi]      # Host temperature sensor
sensor_type: temperature_host

[temperature_fan core_fan]      # Host cooling fan
pin: host:gpiochip0/gpio3       # Host fan pin
max_power: 1.0
sensor_type: temperature_host   # Set to host mainboard temperature
control: watermark              # Control method
target_temp: 48                 # Host cooling fan activation temperature
min_temp: 0                     # Minimum temperature; errors will occur below this temperature
max_temp: 90                    # Maximum temperature; errors will occur above this temperature
off_below: 0.10
kick_start_time: 0.50
max_speed: 0.8                  # Maximum speed, 80% of full power operation
min_speed: 0.3                  # Minimum speed, 30% of full power operation