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 ...

The nano sensor interface presented below is a microcontroller-based universal sensor interface with a power-saver mechanism. The idea, centered around an Arduino Nano (v3 ... INPUT_PULLUP); // Input ...

We powered the sensor stick using the 5 volts out available on the Arduino Uno. I2C also requires pull-up resistors on the data (SDA) and clock (SCL) buses. We used two pull up resistors soldered ...