I recently needed to do a fast motion detection for an installation. The problem was that I didn't know the final environment where it would happen. Classic motion detection sensors work with Infrared detection and have problems with direct sunlight. So I had to do my own solution.
Tweeting pot plants are not the really latest hot shit in the Internet of Things (IoT). It's more or less a must have done once, like writing your own CMS system in the early days. But it is still fun. So I build a tweeting pot plant for my friends at the Miami Ad School.