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relay with power monitor? (feddit.it)

submitted 1 month 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!

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[–] blackbeard@feddit.it 1 points 1 month 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.

[–] hendrik@palaver.p3x.de 1 points 1 month ago* (last edited 1 month 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. You'd have to do some extra step and look up the microcontroller in the Tasmota database, but there should be 4-outlet smart outlets including power monitoring with an ESP inside. The cheap ones seem to be around 35-45€. 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.