HiLetgo 5pcs LM393 3.3V-5V Soil Moisture Detect Sensor Soil Moisture Sensor Soil Hygrometer Detection for Arduino Automatic Watering System Robot Smart car

Description Wiring (4- wire)：1）VCC external 3.3V-5V2）GND External3）DO small board digital output interfaces (0 and 1 )4）AO analog output voltage of small platesInstruction:1.Sensor for detecting moisture in the soil2.Sodule is the blue potentiometer to adjust the threshold for soil moisture , clockwise adjustment, control humidity will be bigger, smaller counter-clockwise3.Digital outputs D0 can be directly connected with the microcontroller through the microcontroller to detect high and low , thereby detecting soil moisture4.Small plates AO analog output modules can be connected and AD through the AD converter , you can get a more accurate value of soil moisture 5.Operating Voltage 3.3V-5V6.Has a fixed bolt holes for easy installation7.PCB Size : 3.2cm * 1.4mPackage Included:5*LM393 Soil Moisture Sensor