This is done with the help of sensors in the motor and on each side of the opening near the floor and mounted on the tracks.
Program to close garage door at night.
You can close the door with the touch of a button as well.
In garage door operators made after 1993 there are required safety features that open the door during the close cycle when they detect something blocking the door.
A garage door monitor 829lm.
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What i would like to do is have smartthings check the status of my tilt sensor at a certain time 9pm and if open click the relay to close the garage.
One option is to use a garage door monitor that alerts you to whether the door is open or closed via an led light.
On my garage i have a tilt sensor and the linear relay setup to open and close my garage door.
It works with your existing garage door opening system and can be set to close your garage in increments from 3 60 minutes.
Includes manual override for when you want the door open and a light sensor that automatically closes the door at dusk.