Raindrop sensor‘s four interfaces

Using Arduino Sensors
1

Hi,i encounter some difficulty about the raindrop sensor, on the raindrop sensor ,there are 2 pins , and it link to anther device ,like this

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63f0cd8b7b2f9522e6993a249333f862274×1279 235 KB

,and i want to ask,What do these four interfaces do?sorry i am the fresh man in arduino,please bear with me。

2

The 2 pins on the left connect to the sensor and the four pins on the right connect to Arduino I can give you the code and pin diagram if you want or you can try this-

3

image

#define sensorPower 7
#define sensorPin A0

void setup() {
	pinMode(sensorPower, OUTPUT);
	
	// Initially keep the sensor OFF
	digitalWrite(sensorPower, LOW);
	
	Serial.begin(9600);
}

void loop() {
	//get the reading from the function below and print it
	Serial.print("Analog output: ");
	Serial.println(readSensor());
	
	delay(1000);
}

//  This function returns the analog soil moisture measurement
int readSensor() {
	digitalWrite(sensorPower, HIGH);	// Turn the sensor ON
	delay(10);							// Allow power to settle
	int val = analogRead(sensorPin);	// Read the analog value form sensor
	digitalWrite(sensorPower, LOW);		// Turn the sensor OFF
	return val;							// Return analog moisture value
}
4

Oh！ So kind of you，Thank you for being a great help

5

your welcome