Clamp Sensor Energy Monitoring - ESPHome in Home Assistant

Published at : 23 Dec 2025

Integrating simple energy monitoring into Home Assistant using a Wemos D1 mini and a clamp sensor, with a brilliant PCB in between.

Wemos D1 Mini: https://amzn.to/3GxaD76
Clamp Sensor: https://amzn.to/3mpOxuZ
PCB: https://www.ebay.co.uk/itm/133077015640


Intro: 0:00
ESPHome: 1:52
Calibration: 5:53
Integration: 11:05

Final ESP Home Config: https://github.com/willbob8/willsurridgetech/blob/master/clampSensor.yaml

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The smart home tech I have is here: https://kit.co/WillSurridgeTech/smart-home-kit
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