YL-69 Soil Moisture Sensor

Product Description:

1. This is a simple soil moisture sensor that can be used to detect soil moisture. When the soil is short of water, the module outputs a high potential, otherwise it outputs a low potential. Use this sensor to make an automatic watering device, so that the plants in your garden do not need to be managed by humans.
2. Sensitivity adjustable
3. Working voltage: 3.3V-5V
4. The module has dual output mode, the digital output is easy to operate, and the analog output is more accurate.
5. Equipped with fixing bolt holes for easy installation
6. Small board PCB size: 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 external 3.3V-5V
GND External GND
DO digital output (0 or 1)
AO analog output

Instructions for use:

1. The soil humidity module is most sensitive to the ambient humidity and is generally used to detect the humidity of the soil.
2. When the soil humidity of the module does not reach the set threshold, the DO port outputs a high level, and when the soil humidity exceeds the set threshold, the module D0 outputs a low level;
3. The digital output DO of the small board can be directly connected to the single-chip microcomputer, and the high and low levels are detected through the single-chip microcomputer, thereby detecting the soil humidity;
4. The digital output DO of the small board can directly drive the relay module, buzzer module, etc. of our store, thus forming a soil moisture alarm device;
5. The analog output AO of the small board can be connected to the AD module, and through AD conversion, a more accurate value of soil moisture can be obtained;

Shipping list

1. As shown in the figure, a set of soil moisture detection module finished board (including detection board and soil moisture probe)
2. 4 pieces of 20cm Dupont wire

example:

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