The hardware is consists of an Arduino microcontroller (here an Arduino Uno R3) and a pre-wired soil moisture sensor module. The soil moisture sensor module , built around the LM393 comparator, gives ...

Arduino soil moisture sensor schematic. Project source code. const int VAL_PROBE = 0; // Analog pin 0 const int MOISTURE_LEVEL = 250; ... I love all about electronics, circuit diagrams and crazy ...