What hotdogs look like, obviously

Thanks for the great response! Especially about the Conbee II and ZHA pieces. I’m slowly piecing things together for my first wave of home automation, and this will definitely help with the analysis-paralysis I’ll hit along the way!

$10 aqara sensors

Where would one find these sensors? And, are they supported by the vendor for a decent amount of time?

Anytime I’ve tried finding door-open sensors in this price range, I can never find brands that seem well known and reputable (thinking of vendor updates), or that won’t take two months to ship to my place. Or is that just the trade off for the price?