Summary
In this chapter, we discussed interfacing a soil sensor to the Pico and monitoring the moisture levels of potted plants. We also discussed publishing the moisture level to ThingSpeak and triggering an LED when the moisture falls below a certain threshold. This project demonstrates the use of the Pico in gardening activities. You could take this project further by turning on a sprinkler valve when the moisture levels fall below a certain threshold. You could also change the NeoPixel behavior based upon the measured moisture levels—for example, you could make use of a NeoPixel LED strip and make it glow amber when your plant needs watering.
In the next chapter, we will discuss building a weather station using the Pico!