Check the garage door opener itself. Maybe there is some kind of device that reports open closed. It probably doesn't know if it's 50% closed, etc, but maybe this would be a good application for an opto sensor if one can be installed so it works (reports status of door from 0% to 100% open).
Check the garage door opener itself. Maybe there is some kind of device that reports open closed. It probably doesn't know if it's 50% closed, etc, but maybe this would be a good application for an opto sensor if one can be installed so it works (reports status of door from 0% to 100% open).