totally disable fan when under a certain temperature

[ligmaSec]

Hi, First off, thank you for this useful piece of software. This works like a charm. Though, I was wondering if it was possible to have the fan not spin at all when under a certain temperature ? Something like the gpio-fan dt-overlay (https://github.com/raspberrypi/firmware/blob/c167a3336a2a770ab840e94f2cb1d379d8478c1d/boot/overlays/README#L1446) but with the PWM feature.

Thanks.

[ar51an]

Though, I was wondering if it was possible to have the fan not spin at all when under a certain temperature ?

This is exactly how fan-control works. Fan will not spin below TEMP_LOW. You can adjust the TEMP_LOW and TEMP_MAX according to your desired value in the config file params.conf, available in the release.

It is mentioned in the Readme under Points to Note. https://github.com/ar51an/raspberrypi-fan-control?tab=readme-ov-file#points-to-note

[ligmaSec]

my fan doesn't stop when the temp is under TEMP_LOW, it seems like it just sits at the lowest rpm

[ar51an]

What is the TEMP_LOW value you are using? (Try with TEMP_LOW=50 and TEMP_MAX=60)

Which fan-control you are using Wiringpi or Pigpio?

How do you know the fan is not stopping below TEMP_LOW, Did you visually inspect it or checked the logs? (Logs will not print anything when fan is stopped)

I just inspected my fan and it is stopping below TEMP_LOW=40 in my environment. I am using RP4, Noctua fan and Wiringpi fan-control.

Edit: When the fan is spinning it will log after every 5 sec (default delay to adjust fan speed). Take a look at below screenshot of fan-control logs. Logs that are marked in red have difference of more than 5 sec. Whenever the difference is more than 5 secs the fan is not spinning, you can verify this by visually inspecting the fan. It is coded this way to reduce logging when the fan is not spinning.

Please paste the output of your fan-control logs as well.