1 Soil moisture module is most sensitive to the ambient humidity is generally used to detect the moisture content of the soil.
2 module in the soil humidity less than a set threshold value when the DO port output high, when the when soil humidity exceeds the threshold value is set, the module D0 output low;
3 small plates digital outputs D0 can be directly connected with the microcontroller, microcontroller to detect high and low, and thus to detect soil moisture;
4 small plates digital output DO shop relay module can directly drive the buzzer module, and which can form a soil moisture alarm equipment;
5 small plates analogue output AO and AD module connected through the AD converter, you can get more accurate values of soil moisture;
This is a simple water sensor can be used to detect soil moisture when the soil moisture deficit module plant waterer a device, so that the plants in your garden without people to manage.
adjustable sensitivity blue digital potentiometer adjustment (Figure)
Operating voltage 3.3V-5V
module dual output mode, the digital output is simple, more accurate analogue output.
fixed bolt hole for easy installation
small plates, PCB size: 3.2cm * 1.4cm
comparator LM393 chip, stable
Two small plate interface description (3-wire)
1 VCC external 3.3V-5V
2 GND external GND
3 DO small board digital output interface (0 and 1)