#define LED_PIN 2
#define POT_PIN 34

#define PWM_FREQ 5000
#define PWM_RES 8      // 8 bits --> 0 to 255

void setup() {
  // Serial.begin(115200);
  // Serial.println("Hello, ESP32!");

  ledcAttach(LED_PIN, PWM_FREQ, PWM_RES);
}

void loop() {
  int potVal = analogRead(POT_PIN);   // 0 to 4095
  int dutyCycle = potVal / 16;        // 0 to 255
  // Serial.println(dutyCycle);

  ledcWrite(LED_PIN, dutyCycle);
  delay(20);
}