Grove - Water Sensor

The sensor traces have a weak pull-up resistor of 1 MΩ. The resistor will pull the sensor trace value high until a drop of water shorts the sensor trace to the grounded trace. Believe it or not this circuit will work with the digital I/O pins of your Arduino or you can use it with the analog pins to detect the amount of water induced contact between the grounded and sensor traces. Features: Grove compatible interface Low power consumption 2.0cm x 2.0cm Grove module High sensitivity Application Ideas: Rainfall detecting Liquid leakage Tank overflow detector