Onboard 5V Fan Port

Gemini has an onboard 5V controllable interface for cooling the main chip. The wiring method is shown in the figure below.

Commands to execute via SSH before adding the configuration

• This step is not required for FAST systems

wget https://cnb.cool/3dmellow/public/static-files/-/git/raw/main/host/linux-dtb-current-fly-sunxi64_3.3.5_arm64.deb && sudo dpkg -i linux-dtb-current-fly-sunxi64_3.3.5_arm64.deb
sudo reboot

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 chip cooling fan
pin: host:gpiochip1/gpio106     # Host fan pin
max_power: 1.0
sensor_type: temperature_host   # Set to host main chip temperature
control:watermark               # Control method
target_temp: 48                 # Host fan activation temperature
min_temp: 0                     # Minimum temperature, errors will occur if below this value
max_temp: 90                    # Maximum temperature, errors will occur if above this value
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