Soil humidity meter detection module soil humidity sensor robot smart car

One baby description
1 This is a simple moisture sensor that can be used to detect the water of the soil. When the soil is short of water, the module outputs a high level and the output is low.Use this sensor to make an automatic flower pouring device so that the plants in your garden do not use people to manage.
2 The sensitivity can be adjusted (the blue digital potentiometer is adjusted in the figure)
4 Working voltage 3.3V-5V
5 The dual output mode of the module, the digital output is simple, and the analog output is more accurate.
6 There is a fixed bolt hole for easy installation
7 small board PCB size: 3cm * 1.6cm
8 The power indicator (red) and digital switch output indicator (green)
9 The comparator uses the LM393 chip, and the work is stable

Second small board interface description (4 line system)
1 VCC external 3.3V-5V
2 GND external GND
3 DO small board digital quantity output interface (0 and 1)
4 AO small board simulation output interface

Three use instructions

1 The soil humidity module is the most sensitive to the environmental humidity and is generally used to detect the humidity of the soil.

2 When the module does not reach the set threshold at the soil humidity, the DO port outputs high level. When the soil humidity exceeds the set threshold, the module D0 outputs low;

3 Small board digital output D0 can be directly connected to the single -chip microcomputer to detect the high and low levels by single -chip microcomputer, so as to detect soil humidity;

4 Small board digital output DO can directly drive the relay module, beeurge module, etc., which can form a soil humidity alarm equipment;

5 Small board analog output can be connected to the AD module. Through AD conversion, you can get more accurate soil humidity;