this post was submitted on 21 Jun 2026
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relay with power monitor? (feddit.it)
submitted 1 week ago by blackbeard@feddit.it to c/esp32@lemmy.ml
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Hello,

I want to covert an extention lead to a smart plug with power monitor. To just create a smart plug seems to be quite easy, got lot of alternatives but to add power monitor seems to be quite hard. Anyone can direct me to any board I can use?

Thanks!

B.

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[โ€“] blackbeard@feddit.it 0 points 1 week ago (1 children)

My idea was to use something like this:

Just with some sort of PM device integrated, I find it quite weird there are any available.

B.

[โ€“] hendrik@palaver.p3x.de 1 points 1 week ago* (last edited 1 week ago)

Hmmh. I think the ACS712 or something similar would do. Or a power clamp around a wire. Just make sure you know what you're doing when messing around with mains voltage. I mean most people just buy something like a Shelly. They also have variants with 2 relais. Or a smart multi-outlet power strip. There's many options to buy. Tinkering with mains voltage and wanting it all exposed is a bit of a niche, I don't know if there's many PCBs out there. That's mostly cheap boards with just the relais.