#define TEMT6000_PIN           33  // ESP32 pin GIOP33 (ADC0) connected to light sensor
#define LED_PIN           13  // ESP32 pin GIOP13 connected to LED
#define ANALOG_THRESHOLD  500

void setup() {
  pinMode(LED_PIN, OUTPUT); // set ESP32 pin to output mode
  pinMode(TEMT6000_PIN, INPUT); // set ESP32 pin to input mode
}

void loop() {
  int analogValue = analogRead(LDR_PIN); // read the value on analog pin

  if (analogValue < ANALOG_THRESHOLD)
    digitalWrite(LED_PIN, HIGH); // turn on LED
  else
    digitalWrite(LED_PIN, LOW);  // turn off LED
}