If you are scared of messing with electricity like I am, instead of using power monitoring, another viable but less reliable option is to use vibration sensors.
I picked up a simple Zigbee vibration sensor for less than 20$, taped it on top of the washer/dryer, and connected it to HomeAssistant using Zigbee2MQTT. After creating two automations to detect start/stop based on continuous vibrations over a few minutes, I had the notifications working the exact same way.
I picked up a simple Zigbee vibration sensor for less than 20$, taped it on top of the washer/dryer, and connected it to HomeAssistant using Zigbee2MQTT. After creating two automations to detect start/stop based on continuous vibrations over a few minutes, I had the notifications working the exact same way.