The Arduino Plant Watering System is designed to automatically supply water to your plant's soil once its moisture level falls below a particular point.

The small arm mounted propeller units are capable of propelling a skin diver through the water with minimal effort and have been created by PeterSripol who built the wrist worn propellers for a ...

The system supports Arduino and ESP controllers. On the phone side, you can use Android or iOS. The RemoteXY site has plenty of examples.

[Blue Blade Fish] wanted to build an Arduino-based aquarium controller. He’s detailed the system in (so far) 14 videos and it looks solid. This isn’t just a simple controller, either.