Wiring ( 4 -wire )：
1）VCC external 3.3V-5V
2）GND External
3）DO small board digital output interfaces ( 0 and 1 )
4）AO analog output voltage of small plates
Instruction:
1.Sensor for detecting moisture in the soil
2.Sodule is the blue potentiometer to adjust the threshold for soil moisture , clockwise adjustment, control humidity will be bigger, smaller counter-clockwise
3.Digital outputs D0 can be directly connected with the microcontroller through the microcontroller to detect high and low , thereby detecting soil moisture
4.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-5V
6.Has a fixed bolt holes for easy installation
7.PCB Size : 3.2cm * 1.4m
Package Included:
5*LM393 Soil Moisture Sensor
