Soil Moisture Sensor Module for Arduino & ESP32

This sensor measures soil moisture by reading the electrical conductivity between two exposed probes: more moisture in the soil means better conductivity, and the module converts that into both an analog reading and a simple digital dry/wet threshold. That pairing makes it useful either way a project needs the data - a fine-grained analog value for logging trends, or a digital trigger for turning a pump on and off.

It runs on the same 3.3V-5V range as most hobbyist boards, so it drops directly onto an Arduino, ESP32 or similar without a separate regulator. The onboard potentiometer sets the digital output trip point, letting the same module suit different soil types without changing code.

Common uses include automated plant watering systems, greenhouse monitoring, and any weather or environmental station that needs to know whether the ground is dry.