1. this is a simple water sensor that can be used to detect soil water. 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 your garden plants to be left unmanaged.
2. sensitivity adjustable (blue digital potentiometer adjustment in figure)
3. Working voltage: 3.3v -5V
4. module dual output mode, digital output simple, analog output more accurate.
5. Fixed bolt hole is provided for easy installation
6. Size of small board PCB: 3cm * 1.6cm
7. Power indicator (red) and digital switch output indicator (green)
8. The comparator adopts LM393 chip and works stably

Interface description (4-wire system)

• VCC is external to 3.3 v-5v
• GND is an external GND
• DO small board digital output interface (0 and 1)
• AO small board analog output interface

instructions

1. Soil moisture module is most sensitive to environmental humidity and is used to detect soil moisture.
2. DO port outputs high level when the soil moisture fails to reach the set threshold value. When the soil moisture exceeds the set threshold value, the module D0 outputs low level.
3. small plate digital output D0 can be directly connected with a single chip to detect high and low level through a single chip, thus to detect soil moisture;
4. small plate digital output DO can directly drive the relay module and buzzer module of our store, which can constitute a soil moisture alarm equipment;
5. Small plate analog output AO can be connected with AD module, and more accurate values of soil moisture can be obtained through AD conversion.

 Delivery list

1. Finished product board of soil moisture detection module as shown in the figure (including detection board and soil moisture probe)
2. 20cm dupont line for easy wiring

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