I know posts on automated plant care are very popular on Gadget Master, so I want to highlight this Arduino appnote - Smart Farm Irrigation System Using Arduino Edge Control.

Researchers from Morocco, the UAE, Egypt, Italy, and South Africa have developed a low-cost IoT- and fuzzy logic–based irrigation system that dynamically adjusts watering using real-time soil and ...

Using a little Arduino hardware and programming YouTuber Brumberjack Woodworks has created a fantastic automatic dust collection system for his workshop.