This is a simple water sensor can be used to detect soil moisture when the soil moisture deficit module outputs a high level, and vice versa output low. Use this sensor produced an automatic plant waterer device, so that the plants in your garden without people to manage. Sensitivity adjustable the blue digital potentiometer adjustment (Figure) Operating voltage 3.3V-5V Module dual output mode, digital output, analog output more accurate. With fixed bolt hole for easy installation PCB size: 3cm * 1.6cm Power indicator (red) and digital switching output indicator (green) Comparator LM393 chip, stable
