DEPRECATED

Use pwm-fan device tree overlay.

https://github.com/alexander-kurichenko/devicetree-custom/tree/master/rpi4

To make it work, desolder controller pin and use Rpi PWM instead:

original image source: Argon40Tech/Argon-ONE-i2c-Codes#1

rpi-argonone

Fan and power control for Argon One Raspberry Pi case

Installation:

• Install i2c-tools package:

  RaspberryPi OS / Debian / Ubuntu: sudo apt install i2c-tools

  Arch: sudo pacman -S i2c-tools

  Fedora: sudo dnf install i2c-tools

   

• Update /boot/config.txt:

# Enable i2c
dtparam=i2c_arm=on

# Argon One poweroff button (triggered by double-click)   
dtoverlay=gpio-key,gpio=4,active_low=1,gpio_pull=down,keycode=116
       

Note for Ubuntu users: you can find this file in /boot/firmware

 

• Copy these files to specified location in your system:

  • /usr/local/bin/fanctrl

    Simple script to control fan speed depending on measured CPU temperature and options in /etc/default/fanctrl

  • /etc/default/fanctrl

    Main configuration file

  • /etc/systemd/system/hw-shutdown.service

    Sends poweroff command at shutdown

  • /etc/systemd/system/fanctrl.service

    Starts /usr/local/bin/fanctrl.

• Enable autostart: systemctl enable fanctrl hw-shutdown

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  Manual control:

Usage: fanctrl [-D] [on|off] [0-4]

on/off - starts/stops fan (1st speed)

0/1/2/4 - set fan speed. More values were not implemented because of noisy fan

-D - this option is used to start it by systemd

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NOTE: If fan was turned off or set to lower speed manually, it will be automatically started when temperature exceeds configured values