Wemos D1 mini and power clamp sensor

[orange-assistant (wisecracker)]

To my knowledge there is no "power clamp sensor" like the title from @TheHoff states.

What does exist are current clamp/coils - that they are not sufficient for any serious power metering stuff (AC, when PF≠1) should be widely known.

@TheHoff

I got inspiration from sources like

And didn’t search the forum to see what mileage people have trying this sources of inspiration?

Home built energy monitor using ESP8266 doesn't see small loads

I used a CT Clamp Sensor and followed this guide. It moves to 2kw when I put the kettle on 0.9kw when I put the 900w microwave on. BUT anything less than these and it just reads 0.000 The ESP logs are showing this: [17:14:49][D][sensor:124]: 'Measured Power': Sending state 0.00000 kW with 1 decimals of accuracy [17:14:49][D][sensor:124]: 'Total Daily Power Usage': Sending state 1.32743 kWh with 3 decimals of accuracy [17:14:50][D][ct_clamp:037]: 'Measured Current' - Raw AC Value: 0.000A aft…

Or long story short

@orange-assistant

@daknightuk

In the end it proved not to be very accurate

You probably build a (maybe) somewhat accurate current meter.

But what you actually wanted was a accurate power meter (your energy is billed on that).

We learned: A current meter can not substitute a power meter (in AC scenarios when PF ≠ 1)

Might want to take a shortcut and use a quite accurate but still very affordable solution which does real power monitoring mentioned here:

Will Low Cost ESP8266 4 Channel Power Monitor Work With ESPHome?

The headline “Will Low Cost ESP8266 4 Channel Power Monitor Work With ESPHome?” is actually misleading. The website states that the product shown in the picture from @Jonah1970 is actually a “ESP8266 - 4 Channel Mains Current Sensor” Accurate power measuring will be impossible with that type of device The blue uses the internal ADC from the esp while the green board uses a (better) ads1115 - still both only measure current and not power Does it matter at all? Wha…