KY-018_photoresistor_sensor.c

int sensorPin = 2;
int value = 0; 

void setup() {
	Serial.begin(9600); 
} 

void loop() {
	value = analogRead(sensorPin); 
	Serial.println(value, DEC); // light intensity
								// high values for bright environment
								// low values for dark environment
	delay(100); 
}