Submitted 2 months ago by Ek-Hou-Van-Braai@piefed.social to selfhosted@lemmy.world
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.
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.
You’re pretty rad, y’know that?
Thanks. 😀
I had to use 4 different sources to make my project work.
It wouldn’t be nice to force others to go trough the same amount of trouble when i already have the files.
That would be amazing thanks, I've barely worked with Arduino but I just ordered a starter kit to play around with and learn.
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. I think buying a dedicated fan board like the one you mentioned might be the most straightforward solution.
Zwuzelmaus@feddit.org 2 months ago
If you want to do this as an ESP project anyway, you don’t need the extra controller.
Fans take a simple PWM signal, which your ESP (or even one of the smallest Arduinos) can create easily.
Ek-Hou-Van-Braai@piefed.social 2 months ago
Good point,
I found this:
Tutorial - How to control a PWM fan with an ESP32 and Home Assistant ( https://www.youtube.com/watch?v=9-AZF6udg-Q )
I'm just going to do that but with more fans