the best smart sensors zigbee, z wave,
smart security door and window contact sensors. contact sensors are most often used as part of smart security systems, put on doors and windows to tell if they've been opened when they shouldn't have.but they're also really useful for knowing if anything has been opened or closed blinds, fridges, drawers, garage doors, doggie doors, medicine cabinets, you name it.
2020. 7. 13. residential garage door openers. watch garaga 45 sec. videos and be amazed! commercial