I built a Volumio media player using a RPi 4 in a custom small metal enclosure. Since it's a RPi4, I was having a heat dissipation problems. Since it's a media player, I didn't want a fan constantly running, so I looked for a simple fan controller where I could switch it on/off based on the RPI reported temperature. This tiny PCB from Jeremy works perfectly!! It's reliable and smaller enough to include inline in the power cable.
One issue; I wish there was a script all ready to use to drive this. I wrote one, but am having troubles with running it detached in the background when the system boots. I am sure there's a straightforward way to do this, just wish it was already documented here.
Jeremy is a great person to deal with!!
Response from Jeremy Cook Consulting LLC | May 19, 2021
Well thank you so much Steven!
As for the script, check this out on GitHub: https://github.com/JeremySCook/RaspberryPi-Fan-Control - I should probably add that to the product listing. You can also use sudo raspi-config and choose your fan settings under Performance Options, though I'm not sure if that will work under Volumio.