By quantifying the exact attenuation of the signal received at the gateways, they were able to determine the soil moisture levels ... of an ATmega328P-based Arduino Pro Mini and SX1276-based ...

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.

When the soil gets too dry, the moisture sensor will signal the pump that it's time to re-hydrate. There are sensors ...