Rain sensor / Snow sensor (OT8002)

This rain sensor can detect both rain and snow. It has a digital output and an analog output (to directly switch a relay, for example). The threshold value can be set with the potentiometer.
Specifications:

Analog output (direct output from sensor surface): A0 (stated on the printed circuit board)
Connection for sensor surface: + and - (order is not important, stated on the printed circuit board)
LED present that indicates the status of the digital output
LED present that indicates the status of the module (on/off)
Voltage: 3.3-5V DC (Vcc and GND, stated on the printed circuit board)
Digital output (adjustable threshold value): D0 (stated on the printed circuit board_x005F_x000D_