Argon ONE V2 FanJS

A simple NodeJS application that can control the fan speed of a Argon ONE V2 case based on the CPU temperature.

Developed and tested with

• NodeJS 12
• PhpStorm 2020.1.1

Basic installation

1. Enable I2C

   sudo raspi-config

   Go to Interface Options > I2C and select Yes
2. Use NVM to switch NodeJS versions (optional, requires NVM to be installed)

   nvm use 12

3. Make a copy of example.fan_config.json and rename it to fan_config.json

   cp example.fan_config.json fan_config.json

4. Change the settings in fan_config.json if you want to customize the default settings
5. Install the Node packages

   npm install

6. Run the fan.js file with NodeJS

   node fan.js

The fan should now go quiet or start spinning, based on the current temperature and config. It's recommended that you also run this as a service, so you don't have to start it up manually on every boot.

Run as service

You can create a service for this Node application, so it automatically runs at startup in the background.

1. Make sure service_start.sh is executable

   chmod +x service_start.sh

2. Creating the service

   sudo nano /etc/systemd/system/argonone-fanjs.service

   Inside the file, add the following code. Please note that you might have to change paths depending on your setup.

   [Unit]
   Description=Argon ONE V2 FanJS Service
   
   [Service]
   WorkingDirectory=/home/pi/projects/ArgonONEV2-FanJS/
   ExecStart=/home/pi/projects/ArgonONEV2-FanJS/service_start.sh
   Restart=on-failure
   
   [Install]
   WantedBy=default.target
   

3. Enabling the service so it starts with the OS.

   sudo systemctl enable argonone-fanjs

4. Reboot the Raspberry Pi and see if the service is running

   sudo reboot

   After the reboot, run this to see if the service is running

   systemctl status argonone-fanjs

You should now have a service that automatically runs service_start.sh on boot with NodeJS 12.

It runs the script with the --quiet parameter, so it only logs errors. If you don't want this, remove the --quiet parameter from service_start.sh