THIRDREALITY Zigbee Water Leak Sensor. I got it off amazon $20 works great with ZB2MQTT I have it under my AC unit in the garage incase the drain gets plugged and condensation goes crazy. It beeps loudly when it detects water so if something is up with your HA or zigbee network, it still alerts someone. I would buy another one, prime shipping and not too expensive.

Doubletake looks pretty cool! I’ll add it to my Ubuntu PC and see how it works with frigate.

I use frigate on a separate PC that’s several years old that I snagged from work surplus. You can find a similar one on eBay or woot. When I started, Frigate is a resource hog on a pi. MQTT on the pi as a HA addon is plenty.