Implementation

For the final device, I assumed that for a specific plant, the optimum growth temperature for the plants is between 20-30 degrees centigrade and the proper growth humidity is from 30% to 60%. Then I defined 5 different status of growth conditions depending on the temperature and humidity - The further away the real condition is from the defined environment, the more likely the plant would be in trouble.

Based on this, there are three main interactions between the plant and the owner:

1  See the "life bar" & learn more on your phone

The “life bar” made up of 5 LEDs shows whether your plant is struggling in a certain environment. The worse the condition is, the fewer LEDs will remain, the quicker the LEDs will blink to draw your attention. You could see how the plant reacts toward the environment and replace your plant depends on the parameter you see on your phone.

(For it is not easy to show the temperature or humidity change naturally in a short period of time, I use a heater to accelerate the temperature increase for demonstration. In real situation temperature lower or higher than the standard temperature and humidity that are lower or higher than the standard one could all trigger the same function.)