/*
 * This ESP32 code is created by esp32io.com
  *
   * This ESP32 code is released in the public domain
    *
     * For more detail (instruction and wiring diagram), visit https://esp32io.com/tutorials/esp32-light-sensor
      */

      #define LIGHT_SENSOR_PIN 35// ESP32 pin GIOP36 (ADC0)
int led=33;
      void setup() {
        // initialize serial communication at 9600 bits per second:
         pinMode(led, OUTPUT);
          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 < 40) {
                          Serial.println(" => Dark");
                          digitalWrite(led, HIGH);
                            } else if (analogValue < 800) {
                                Serial.println(" => Dim");
                                digitalWrite(led, HIGH);
                                  } else if (analogValue < 2000) {
                                      Serial.println(" => Light");
                                      digitalWrite(led, LOW);
                                        } else if (analogValue < 3200) {
                                            Serial.println(" => Bright");
                                            digitalWrite(led, LOW);
                                              } else {
                                                  Serial.println(" => Very bright");
                                                  digitalWrite(led, LOW);
                                                    }

                                                      delay(500);
                                                      }