Needless to say, this is a simple experiment for Arduino beginners, but trying an experiment is even more pleasant when the result is something unique. The goal is now to use a pre-wired rain sensor ...

For temperature and humidity, a DHT22 sensor is located in a 3D printed Stevensen screen, giving the sensor steady airflow while protecting the module from direct sunlight and rain.

The soil moisture sensor module , built around the LM393 comparator, gives an active-low (L) level output when the soil is dry (determined by a pre-setted threshold value). This digital output (wet ...