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ar51an / raspberrypi-fan-control

Raspberry Pi Adjust Fan Speed With Temperature [C - WiringPi - Pigpio - Noctua PWM Fan]
MIT License
34 stars 6 forks source link

totally disable fan when under a certain temperature #9

Closed ligmaSec closed 4 months ago

ligmaSec commented 5 months ago

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 commented 5 months ago

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 commented 5 months ago

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

ar51an commented 5 months ago

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.

fan-logs

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