#define LIGHT_SENSOR_PIN 36 // ESP32 pin GIOP36 (ADC0)

void setup() {
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
}

void loop() {
  // reads the input on analog pin (value between 0 and 4095)
  int analogValue = analogRead(LIGHT_SENSOR_PIN);

  Serial.print("Analog Value = ");
  Serial.print(analogValue);   // the raw analog reading

  // We'll have a few threshholds, qualitatively determined
  if (analogValue <= 8) {
    Serial.println(" => Direct Sunlight");
  } else if (analogValue <= 39) {
    Serial.println(" => Full Daylight");
  } else if (analogValue <= 170) {
    Serial.println(" => Overcast Day");
  } else if (analogValue <= 281) {
    Serial.println(" => Office Lighting");
  }else if (analogValue <= 511) {
    Serial.println(" => Stairway Lighting");
  }else if (analogValue <= 633) {
    Serial.println(" => Computer Monitor");
  }else if (analogValue <= 853) {
    Serial.println(" => Twilight");
  }else if (analogValue <= 985) {
    Serial.println(" => Deep Twilight");
  } 
  else {
    Serial.println(" => Full Moon");
  }

  delay(500);
}