Smart Electronics Soil Moisture Hygrometer Detection Humidity Sensor Module For arduino Development Board DIY Robot Smart Car

Description1 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-5V5 module dual output mode, digital output is simple, analog output is more accurate.6 Fixed bolt holes for easy installation7 small board PCB size: 3cm * 1.6cm8 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-5V2 GND external GND3 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 Module When the soil m