Non-human user:
My non-human user is plants. The goal of the project is to treat plants with greenflies automatically so even if you are on holiday your precious plants are saved.
Solution
The solution to the problem is to mount sensors on the plants that will detect if the plant gets darker and there by start the treat of spraying soap water on the plant.
Above is a sketch of the solution
Muck-up
Sensors are placed around the plant. When they detect a colour change on the plant a motor is activated that drives a pump and soap water is sprayed onto the plant!