Fan-control

A tool to control 25W POE Hat fan speed by temperature automatically for ROCK5B.

Features

1. Control fan speed by temperature. (above 45 degrees)
2. set fan speed manually

Prerequisites

Device Tree Overlay enabling PWM8 is required.

Enable pwm8 overlay via armbian-config or add manually

# fetch device tree overlay from vendor kernel
wget https://raw.githubusercontent.com/armbian/linux-rockchip/rk-6.1-rkr1/arch/arm64/boot/dts/rockchip/overlay/rk3588-pwm8-m0.dts

# compile overlay
dtc -O dtb -o rk3588-pwm8-m0.dtbo -b 0 -@ rk3588-pwm8-m0.dts

# copy and update prefix to match armbian default of `rockchip-rk3588'
cp rk3588-pwm8-m0.dtbo /boot/dtb/rockchip/overlay/rockchip-rk3588-pwm8-m0.dtbo

# enable overlay in /boot/armbianEnv.txt -- assumes no other overlays exist
# you may want to do this via armbian-config now instead
echo "overlays=pwm8-m0" >> /boot/armbianEnv.txt

rebooo afterwards to load overlay

Build & install

make package
dpkg -i fan-control*.deb

Usage

systemctl enable fan-control
systemctl start fan-control

Configuration

configuration file locations is /etc/fan-control.json, Configuration parameter description:

Configuration	Description
pwmchip	pwmchip id, 1 for auto scan
gpio	gpio id, 0 is default gpio
pwm-period	PWM period
temp-map	temperature configuration table
temp	temperature, in degrees Celsius
duty	duty ratio
duration	duration, in second

License

MIT License