This is a temperature speed control daemon for your 4 pin PWM fan on a Raspberry Pi.

I have a Raspberry Pi 4b I use with Hyperion. At times it can get very hot, ~70C. I bought a case with integrated fans, but the small fans eventually became noisy. I Switched to Noctua NF-A6x25 5V 60mm fan. At full speed it is also quite noisy. Using Python code from here as inspiration, I set out to build a program to control the fan.

• Install rustup
• Clone this git repository
  • git clone https://github.com/treydempsey/fan_control
• Build the code
  • cargo build --release
• Install the binary
  • sudo cp target/release/fan_control /usr/local/bin
• Install the systemd unit file

  • sudo cp fan_control.service /lib/systemd/system
    sudo systemctl enable fan_control
    sudo systemctl start fan_control

Prebuilt binaries are avalible in the GitHub releases for this project.