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The one wire that can fry your ESP32 tank monitor (chartmann1590.github.io)
submitted 2 days ago by to c/homelab@lemmy.ml
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A turbidity sensor runs on 5 V and outputs up to about 4.5 V, but an ESP32-C3's pins only take 3.3 V. Here is why it needs a voltage divider, how to wire it, and the checks to do before you plug in USB.

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Disclosure: this is a Homelab the Right Way article by Charles Hartmann, written with AI help and edited by him; the setup described is his own.

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[–] 4 points 2 days ago (2 children)

Unreadable AI slop.

Did the author actually test 5v into the microcontroller? The signal values might be intended to be 3.3v, but I have a bunch of esp32 boards reading 5v signals on their pins, and they have been doing that for years now. At the time I did some research and found posts from the espressif designer that claimed that the pins were okay with 5v.

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  • [–] 2 points 2 days ago (1 child)

    I've also been taking 5v on esp32 and esp8266 pins for years without any issues whatsoever.

    The article also claims DS18B20 are happy with 3.3v - technically yes, but if you have any long runs they are much more reliable at 5v. Yes every time I refer to a LLM when wiring them, it constantly makes the same point this article does, which is that dividers must be used. I think that lends weight to your claim that it's AI written.

    Even if it isn't written by AI, it's certainly written by someone with very little experience on the subject.

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