DietPi Fan control?

Requests
1

Hello, I have searched the interwebs for a bit and havent found a solution to having a switch and a fan running dietpi. I can turn off the GPIO pins(3v3 turns off) but then i wont be able to wake the device up from a button. Also currently dont have pwm control only turn on at set temps.

I was poking around and i saw that in the github under meta, there is a dietpi fan control file with what seems to be like a pwm control. Is this not enabled(i couldnt find it on my pis)? Is there an eta on this if not? Really like dietpi but feels like i should be able to use pwm pretty easily on an rpi4

2

Welcome to our community.

There is no eta for the fan control script as we don’t have resources to work on it currently.

3

Is there anything we as a community can do to provide those resources? Im glad it is on the radar though.

4

Everybody is invited to join us on GitHub and start working on this item if he/she is familiar with Bash coding :wink:

We are an exceedingly small project having a single developer only, doing all this on free/spare time. Volunteers are always welcome.

5

And I guess some donations are also always welcome. Please donate generously. A dollar a month will be great contribution for anyone who can afford. I have done my share few times and will do as and when I have some spare money. Thanks for pitching in.

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6

The dietpi-fan_control script as it is now works/worked with the legacy-kernel Odroid C2. Sadly every SBC has it’s own fan sysfs API. Some logics seem to emerge with newer mainline kernel, but it requires still a complex auto-detection to get it working in a genetic way.

Investigating/testing the sysfs API for controlling the fan of an SBC you own would be a good start.

Another approach is testing apt install fancontrol. I’m not sure how reliable it works with SBCs, but if it does, it seems much better than re-inventing the wheel.

7

FWIW …

I have the HighPi Pro 5V Cooling Fan installed in a HighPi case that is acting as a media server
Initially installed with

echo ‘dtoverlay=gpio-fan,gpiopin=14,temp=60000’ >> /boot/config.txt

Rebooted & then

apt install lm-sensors fancontrol
pwmconfig
systemctl enable --now fancontrol

Gives me a nice cool Raspberry Pi 4B that doesn’t seem to get over 50° even when stress testing

2 Likes
8

This is working for me with the GeeekPi RPi4 Aluminum Heatsink (https://www.amazon.com/dp/B091L1XKL6?psc=1&ref=dmm_asc_ir_4061861_R-UW1B1UZxyNT-px3Dynxw2DUkFS4mw5uVk-280&irgwc=1)

with it connected to the same gpio pin as listed (the one i bought calls out gpio pin 14 as well). however i will note that I had to run the echo command after ssh’ing into the root of the device, and i had to remove the single quotes, i.e. mine was:
echo dtoverlay=gpio-fan,gpiopin=14,temp=60000 >> /boot/config.txt
and then it was working, i.e. the pwmconfig then picked up the fan sensor after reboot, where it was not before.

Thanks for the help!!

1 Like