LDR Light Sensor Module

const int sensorPin = A0;

void setup() {
  Serial.begin(9600);
  while (!Serial) {
    ;
  }
  Serial.println("LDR Light Sensor Module example");
}

void loop() {
  int raw = analogRead(sensorPin);
  float voltage = raw * (5.0 / 1023.0);

  Serial.print("Raw: ");
  Serial.print(raw);
  Serial.print("\tVoltage: ");
  Serial.print(voltage, 2);
  Serial.println(" V");

  delay(500);
}