Argon One fan speed tools

Project purpose

This project allows automatic fan speed adjustment of the Argon One Case without Python. It is written in Go to use less memory (and for fun).

The project creates 3 tools :

• readtemp : display the current CPU temperature
• setfan : set the fan speed
• adjustfan : automatic fan speed adjustment

Both setfan and adjustfan require root privileges to access I2C device.

Tested on...

I created this for my personnal use, and only tested on a Raspberry Pi 4 using :

• Ubuntu 19.10 (arm64).
• Raspbian (arm32, based on Debian Buster).

The deploy part is rather quick & dirty. But it works.

Build and install

To build, and install the tools (including starting adjustfan daemon) :

make
sudo make install

The tools are installed in /opt/argononefan. After that adjustfan should run as a service. You can change thresholds (see below).

Uninstall

sudo make uninstall

Change fan thresholds

The file /opt/argononefan/adjustfan.json contains the configuration used to adjust the fan speed according to the CPU temperature.

You can change its content, and restart the service with :

sudo systemctl restart adjustfan.service

An example :

{
    "thresholds": [
        {
            "temperature": 65,
            "fanspeed": 100
        },
        {
            "temperature": 60,
            "fanspeed": 50
        },
        {
            "temperature": 55,
            "fanspeed": 10
        }
    ]
}

Thresholds have to be ordered from the higher to lower temperature. Under the lowest temperature the fan is stopped.

Licence

Released under the MIT License, see LICENSE.txt for more informations.==)