The Soil Hygrometer Detection Module (2-Needle Soil Moisture Sensor) is a simple and effective solution for measuring the moisture level in soil. It works by detecting the electrical resistance between two probes inserted into the soil, which varies depending on the water content.

This module is widely used in Arduino and IoT-based projects for smart irrigation systems, plant monitoring, and agricultural automation. It provides both analog and digital outputs, allowing users to monitor moisture levels and trigger actions such as automatic watering.

The sensor module includes a comparator circuit with an adjustable potentiometer, enabling users to set threshold levels for digital output. Its compact design and easy interfacing make it ideal for beginners as well as professionals.