a 2022 paper by Maja Škiljo and colleagues in Sensors covers an interesting way to make use of this signal attenuation property of changing moisture levels in soil. By quantifying the exact ...

Common “soil moisture meter module arduino raspberry compatible free shipping ... what it takes to build a soil-embedded sensor that can actually survive contact with a plant.

An Arduino is a microcontroller — a ... and some sort of container to hold a reserve. When the soil gets too dry, the moisture sensor will signal the pump that it's time to re-hydrate.