We are getting way off topic from the OP, but I just wanted to say be careful with any rule that automatically closes a garage door.
Public service announcement:
If you're using a commercially available interface, then you probably have all the appropriate alarms, auto-reverse, etc., but please still be careful. Small children and animals can get injured under a closing door even if it is properly adjusted and they won't necessarily be deterred by the alarm. Oh, and everyone is testing that their garage door safety features work properly at least as often as they change batteries in their smoke detectors, right? If you don't still have the manual for your opener, look it up online. It is not too hard for the force adjustment to get out of whack and fail to reverse the door when needed.
We now return you to your regularly-scheduled home automation discussion. Thank you for listening.