Raspberry Pi fan control

This project provides examples of fan control based on the current CPU temperature.

It includes implementations of a relay controller and a proportional controller.

The fan is connected via a transistor switch to the 4th pin of the I/O ports. The fan connection pin can be changed in scripts. The remaining parameters can be set at startup.

Setting up and running the project

Clone repository:

git clone https://github.com/Nkeramov/raspberry_pi_fan_control.git

Switch to repo directory

cd raspberry_pi_fan_control

Сreate new virtual environment:

python -m venv .venv 

Activate the virtual environment with the command:

source .venv/bin/activate

Install dependencies from the requirements file:

pip install -r requirements.txt

Run relay fan controller with command (args for example):

python3 relay_controller.py --lower 45 --upper 50 --delay 5

Run proportional fan controller with command (args for example):

python3 proportional_controller.py --temp 45 --delay 5 --p 15.0 --dmin 50 --dmax 100

Or use a launch script run.sh, making it executable first

chmod +x run.sh

Script arguments can be changed.

Adding to startup

You can set up automatic script launch at system startup.

Open the /etc/rc.local file in editor:

sudo nano /etc/rc.local

Add to the end of file this line:

/home/pi/raspberry_pi_fan_control/run.sh &

Press Ctrl+O → Enter → Ctrl+X to save and exit. With these few easy steps, you now have automatic fan control.

Contributing

If you want to contribute, please follow these steps:

1. Fork the repository.
2. Create a new branch for your feature or bug fix.
3. Make your changes and commit them.
4. Push to your fork and create a pull request.

License

This project is licensed under the MIT License. See the LICENSE file for details.

Ref

• Getting started
• Raspberry Pi OS