With Ubuntu on Raspberry Pi 5 there is no service to monitor cpu temperature and adjust the fan accordingly. This script checks the temperature every two seconds and adjusts the fan accordingly.
This has been tested on Raspberry Pi 5 Model B, running Linux Kernel 6.8.0 and Python 3.12 under Ubuntu Linux 24.04 LTS
Every two seconds the service script, fan-control, checks the cpu temperature, and compares it to a set of constants to determine the fan speed to set. The fan speed is represented by the FanSpeed enum. The values correlate to the table below.
| Value | Fan Speed Constant | Temp |
|---|---|---|
| 4 | FanSpeed.MAX | >70°C |
| 3 | FanSpeed.HIGH | >65°C |
| 2 | FanSpeed.MEDIUM | >60°C |
| 1 | FanSpeed.LOW | >55°C |
| 0 | FanSpeed.OFF | <55°C |
- A Raspberry Pi 5
- A suitable Linux distribution
- Python 3.4+
The setup script must be run on the same path as the fan-control script and fan-control.service unit file as that is the path written to the service unit file. If you wish to move these files, simply run setup.sh agaib.
Clone this repository:
git clone https://github.com/nicciniamh/pi5-fan-control
Then cd to p5i-fan-control and run ./setup.sh and follow the prompts.
cd pi5-fan-control
./setup.sh
I wrote this inspired by James Ashley's Pi 5 Fan Controller
I wanted to integrate systemd and create a service to keep my pi cool. As I thought about it further, I wrote additional code based on this as part of my SensorFS project which also provides remote control.
The service, however, is stand-alone. No third party libraries are used.
This code is covered by the MIT license. Pretty basic. Please when attributing, also attribute James Ashley as the original coder. :)