Arduino Rain Sensor Tutorial - How Rain Sensor Works and How to use it with Arduino
How to Wire and Code a Rain Sensor module to a Arduino - YouTube
Rain Water Sensor Module Dc 5v 12v Relay Control Module Rain Sensor Water Raindrops Detection Module For Robot Kit - Buy Rain Sensor,Rain Gauge Sensor,Raindrop Sensor Product on Alibaba.com
FC-37 Rain Sensor with YL-38 Comparator Module, Arduino Compatible