The above Animation of the Rain Detection Sensor shows how the analog output of the sensor changes based on the water droplets falling on top of it. The more intense the rainfall the lower the resistance. When rain falls on top of the sensor the resistivity of the conductive plates changes, and by measuring the changes in the resistance, we can determine the intensity of the rainfall. The PCB is made out of multiple exposed log conductive plates arranged in a grid format. The working principle of the Rain Detection Sensor is pretty simple, as you can see in the image below. GND is the ground pin of the board and it should be connected to the ground pin of the Arduino.ĭOUT is the Digital output pin of the board, output low indicates rain is detected, and high indicates no rain condition.ĪOUT is the Analog output pin of the board that will give us an analog signal in between vcc and ground. But do note that the analog output will vary depending upon the provided supply voltage. VCC is the power supply pin of the Rain Detection Sensor that can be connected to 3.3V or 5V of the supply. Like Soil Moisture Sensor, the Rain detection sensor module also has four pins VCC, GND, Aout, and Dout that can be used to get the needful information out of the sensor, The pinout of the Rain Detection Sensor is given below: This sensor also has a separate indicator led and an onboard potentiometer through which you can adjust the sensitivity of the output digital signal provided by the sensor. It acts as a switch when raindrops fall on the sensor, other than that with slight tweaks in the code, it can also measure the intensity of the rainfall. The raindrop sensor also known as rain detector sensor is an easy-to-use device that can detect rainfall. So in this article, we decided to Interface the Rain Sensor with an Arduino. When it comes to detecting certain changes in weather conditions, it's pretty unpredictable, and rainfall is one of the most unexpected parameters of weather.
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