I think that although his approach works, the smarter thing would be to fix a hi-definition camera pointing at his driveway entrance, and use OpenCV/ML/AI[1] to

I think that although his approach works, the smarter thing would be to fix a hi-definition camera pointing at his driveway entrance, and use OpenCV/ML/AI[1] to detect that it's him approaching the house and automatically open the garage door. For bonus points he could then rig up a speaker to sing 'welcome home' as well... For even more bonus points, anyone coming up the driveway that isn't him could be greeted by Barking-Dogs.mp3 --- [1] Or whatever that magic thing is that NCIS use every week.