Soil Hygrometer Detection Module
1. This is a simple water sensor can be used to detect the moisture content of the soil, when the soil water deficit, the module outputs a high output low, and vice versa. Use this sensor produced an automatic watering device, so that the plants in your garden need not to manage.
2 adjustable sensitivity (blue digital potentiometer adjustment)
4 Operating voltage 3.3V-5V
5 module dual output mode, digital output, analog output more accurate.
6 with fixed bolt hole for easy installation
7 board PCB size: 3cm * 1.6cm
8 power indicator (red) and digital switch output indicator (green)
9 comparator LM393 chip, stable
1. VCC external 3.3V-5V
2. GND external GND
3. DO board digital output interface (0 and 1)
4. AO board analog output interface
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