เซ็นเซอร์วัดความชื้นในดิน, Soil moisture meter, soil moisture sensor module, detection module

product description :

1 This is a simple moisture sensor can be used to detect soil moisture, when the soil water shortage, the module output a high level, while the output low. Use this sensor to create an automatic watering device to keep your plants in the garden unmanaged.
2 sensitivity adjustable (figure blue digital potentiometer adjustment)
4 Operating voltage 3.3V-5V
5 module dual output mode, digital output is simple, more accurate analog output.
6 with a fixed bolt hole for easy installation
7 small board PCB size: 3cm * 1.6cm
8 Power indicator (red) and digital switch output indicator (green)
9 comparator with LM393 chip, stable

 small board interface description (4-wire system)
1 VCC external 3.3V-5V
2 GND External GND
3 DO board digital output interface (0 and 1)
4 AO small board analog output interface

Three instructions

1 Soil Moisture Modules are most sensitive to environmental humidity and are generally used to detect soil moisture.

2 module in the soil humidity reaches the set threshold, DO port output high, when the soil humidity exceeds the set threshold, the module D0 output low;

3 small board digital output D0 can be directly connected with the microcontroller, through the microcontroller to detect high and low levels, thus to detect soil moisture;

4 small board digital output DO can directly drive our relay module, buzzer module, which can form a soil moisture alarm equipment;

5 small board analog output AO can be connected with the AD module, through the AD conversion, you can get a more accurate soil moisture value;