HW-103A Soil Moisture Meter Detection Module Robot Smart Car

Description 1 This is a simple moisture sensor that can be used to detect soil moisture When the soil is short of water the module outputs a high level otherwise it outputs a low level Use this sensor to create an automatic watering device that takes the plants in your garden out of the hands of humans 2 The sensitivity is adjustable adjusted by the blue digital potentiometer in the picture 3 Working voltage 3 3V 5V4 Module dual output mode digital output is simple and analog output is more accurate 5 With fixing bolt holes for easy installation6 Small board PCB size 3cm 1 6cm7 Power indicator red and digital switch output indicator green 8 The comparator adopts LM393 chip which works stablySmall board interface description 4 wire system 1 VCC external 3 3V 5V2 GND External GND3 DO small board digital output interface 0 and 1 4 AO small board analog output interfaceInstructions for use 1 The soil moisture module is sensitive to environmental humidity and is generally used to detect soil moisture 2 When the soil humidity of the module does not reach the set threshold the DO port outputs a high level and when the soil humidity exceeds the set threshold the module D0 outputs a low level 3 The digital output D0 of the small board can be directly connected to the single chip microcomputer and the high and low levels are detected by the single chip microcomputer thereby detecting the soil moisture 4 The small board digital output DO can direct