Revised content:

Wiring (4-wire): 1) VCC: External power supply, 3.3V-5V 2) GND: External ground 3) DO: Digital output interface (0 and 1) for the small board 4) AO: Analog output voltage of the small plates

Instructions: 1. This sensor is used for detecting moisture in the soil. 2. The blue potentiometer (module) is a dial to adjust the threshold for soil moisture. Turning it clockwise increases the control humidity, while turning it counterclockwise decreases it. 3. The digital output D0 can be directly connected to the microcontroller, allowing the microcontroller to detect high and low levels, thereby detecting soil moisture. 4. The small plates' AO (analog output) modules can be connected to an AD converter, enabling you to obtain a more accurate value of soil moisture. 5. The operating voltage is 3.3V-5V. 6. The sensor has fixed bolt holes for easy installation. 7. The PCB size is 3.2cm x 1.4m.

Package Included: 5 x LM393 Soil Moisture Sensor

This is a simple moisture sensor that can be used to detect soil moisture. When the soil lacks water, the module outputs a high level; otherwise, it outputs a low level.

You can use this sensor to create an automatic watering device that will maintain your garden or plants without requiring manual intervention.

The module offers dual output modes: digital output is simple, while the analog output is more accurate.

The sensitivity is adjustable using the blue digital potentiometer on the module.

The sensor utilizes the LM393 chip, which provides a stable performance.

product information: