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Advice needed for 10" Rack ESP32 cooling (piefed.social)
submitted 1 year ago by to c/selfhosted@lemmy.world
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So I've got a couple of Mini PC's and a ODROID H4+ as a NAS, all just standing on my desk at the moment.

I'm going to build them into a 10" Rack and I'd like to have a good cooling solution.

My idea is to buy something like this https://www.alternate.nl/Noctua/NA-FH1-fancontroller/html/product/1917195 And wire it up with a ESP32 board and temperature probes, so that I can connect it all to a dashboard in Home Assistant.

Any advice on this project, or better alternatives would be appreciated.

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[–] 6 points 1 year ago (4 children)

I actually have a working'ish prototype of this project laying on my table right now.
It's a 120mm noctua fan being controlled by pwm i relation to the temperature. It also has an oled screen to show temp and fan speed. All controlled trough home assistant via esphome.
I say working'ish because the temp sensor i'm using (dht11) is unreliable and is messing up half the time, so i'm looking into buying a DS18B20 instead.
I'd be happy to share schematics and code if you'd like it.

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  • [–] [S] 2 points 1 year ago (1 child)

    That would be amazing thanks, I've barely worked with Arduino but I just ordered a starter kit to play around with and learn.

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    • [–] 2 points 1 year ago*

    I think pretty much any mosfet / h-bridge / motor control board with pwm should do.
    If you have those 4-wire fans with a pwm input that accepts 3V3 logic, you might even be able to attach them directly to the ESP:

    But that's not all fans, I had some mixed results with that.

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