We have had a few posts about monitoring your garage door but this one is a little bit different.
Diy garage door monitor.
Uses ifttt to update a google sheet when the status of the door changes.
Of course that all depends on whether or not you have a server a fair amount of coding skills and a few spare parts lying around.
Often you will not even need any tools to mount the sensor.
Magnetic reed switches located on the garage door rails to monitor door open and closed.
Usually the kits come with one sensor and one monitor.
Communicate with thinger io to send when the door opened closed auto closed or the module rebooted.
The magnet is on the door.
The build cost 05 and only took an afternoon to complete.
These are reasonably inexpensive and easy to install.
I have 2 of these modified switches one by the front door and one by the rear allowing me to open and monitor the garage door from either spot.
The doorbell switch now activates the garage door opener and the light comes on when the door opens whole thing runs off the existing door bell transformer using repurposed 4 conductor telephone corded.