LM393 Soil Hygrometer Moisture Sensor is a simple water sensor can be used to detect soil moisture when the soil moisture deficit module outputs a high level, and vice versa output low. This sensor can be used in automatic plant waterering device. Sensitivity of the device is adjustable using the onboard potentiometer.

Operating voltage 3.3V-5V Module dual output mode, digital output, analog output more accurate. With fixed bolt hole for easy installation PCB size: 32mm * 14mm Power indicator and digital switching output indicator Comparator LM393 chip, stable Interface Description (4-wire) VCC: .3 V-5V GND: GND DO: digital output interface (0 and 1) AO: Analog Output Interface Instructions for use: LM393 Soil Hygrometer Moisture Sensor is generally used to detect the moisture content of the soil. DO port output high, when the the soil humidity exceeds a set threshold value, the module D0 output low; The digital output D0 can be connected directly with the microcontroller to detect high and low by the microcontroller to detect soil moisture; The digital outputs DO can directly drive a buzzer, which can form a soil moisture alarm equipment; Analog output AO and AD module connected through the AD converter, you can get more precise values of soil moisture.