Beginner4/7/2026- Author: IoTSpark Maker
ESP32 + Soil Moisture Sensor: Measuring Soil Moisture (Quick Test Sample Code)
A resistive soil moisture sensor uses 2 electrodes inserted into the soil — the wetter the soil, the lower the resistance between them.
soil-moisturedo-am-dat
4 steps2 components
A resistive soil moisture sensor uses 2 electrodes inserted into the soil — the wetter the soil, the lower the resistance between the electrodes (better conductivity from water and dissolved minerals). The module typically has an LM393 comparator circuit, outputting both a digital signal (threshold) and an analog signal (continuous value).