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, and vice versa.
Use this sensor to create an automatic watering device that allows plants in your garden to be left unmanaged.
2.Sensitivity adjustable (blue digital potentiometer adjustment in the figure)
4.working voltage 3.3V-5V
5.module dual output mode, digital output is simple, analog output is more accurate.
6.Fixed bolt holes for easy installation
7.small board PCB size: 3cm * 1.6cm
8.power indicator (red) and digital switch output indicator (green)
9.comparator uses LM393 chip, stable operation
Two small board interface description (4-wire system)
1.VCC external 3.3V-5V
2.GND external GND
3.DO small board digital output interface (0 and 1)
4.AO small board analog output interface
Three instructions for use
1.The soil moisture module is most sensitive to environmental humidity and is generally used to detect soil moisture.
2.Module When the soil moisture does not reach the set threshold, the DO port outputs a high level, when the soil moisture exceeds the set threshold, the module D0 outputs a low level;
3.small-plate digital output D0 can be directly connected with the single-chip microcomputer, and the high-low level is detected by the single-chip microcomputer, thereby detecting the soil moisture;
4.small board digital output DO can directly drive the store’s relay module, buzzer module, etc., which can form a soil moisture alarm device;
5.small plate analog output AO can be connected with AD module, through AD conversion, you can get more accurate values of soil moisture;
Four delivery list
1.Set of soil moisture detection module finished board as shown in the figure (including test board and soil moisture probe)
2.20cm DuPont line for easy wiring