ESP8266 based washer/dryer current monitoring via a split core current transformer over ESPHome.
https://github.com/digiblur/digiDryerMon
Video Demostration and Setup - https://www.youtube.com/watch?v=1tqJkw5f0iA
Split Core Current Transformer
Wemos D1 Mini
10µF Capacitor
10k Resistors
Preformed Jumpers
Breadboard
Alternative NodeMCU 8266
Alternative NodeMCU 8285
https://www.digiblur.com/2018/11/smart-laundry-notifications-with-sonoff.html