SwitchBot 開閉センサー

Setup took me under five minutes and now I get a phone alert the second the back door cracks open, which is exactly what I needed for peace of mind with my toddler roaming around. The built-in light sensor even fires the hallway lamp automatically when that door opens at night, so it's doing double

Setup was painless thanks to the adhesive backing, and the magnetic sensor pairs with the hub in seconds. I love that the built-in light sensor means the smart lights come on the moment I crack the door at night, no extra motion detector needed.

Finally got around to setting this up on the back door, and the built-in light sensor is a nice touch—it only triggers the alarm at night, so I don't get false alerts during the day when the dog bumps it. The app notification was instant when I opened it for a test, and it's already given me peace o