1PCS Smart Electronics Soil Hygrometer Humidity Detection Module Moisture Water Sensor Soil moisture for Arduino

Description 1 This is a simple moisture sensor that can be used to detect soil moisture. 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 plants in your garden to be left unmanaged. 2 Sensitivity adjustable (blue digital potentiometer adjustment in the figure) 4 working voltage 3.3V-5V 5 module dual output mode, digital output is simple, analog output is more accurate. 6 Fixed bolt holes for easy installation 7 small board PCB size: 3cm * 1.6cm 8 power indicator (red) and digital switch output indicator (green) 9 comparator uses LM393 chip, stable operation Small board interface description (4-wire system) 1 VCC external 3.3V-5V 2 GND external GND 3 DO small board digital output interface (0 and 1) 4 AO small board analog output interface   Instructions for use 1 Soil moisture module is most sensitive to environmental humidity and is generally used to detect soil moisture. 2 Mo