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 ...

but you can build your own secure access with an Arduino. Just be warned: this one is a bit more complicated than the others ...

The Arduino Sensor Kit is a versatile and user-friendly addition to the Arduino ecosystem. Its plug-and-play design, combined with a wide array of sensors and modules, makes it an excellent choice ...