const int potPin = 34;
int potValue = 0;

const int ledPin = 16;  // 16 corresponds to GPIO16

const int freq = 5000;
const int ledChannel = 0;
const int ledChannel1 = 1;
const int resolution = 8;

void setup() {
  Serial.begin(115200);
  // configure LED PWM functionalitites
  ledcSetup(ledChannel, freq, resolution);
  ledcSetup(ledChannel1, freq, resolution);
  // attach the channel to the GPIO to be controlled
  ledcAttachPin(ledPin, ledChannel);
  ledcAttachPin(18, ledChannel1);
}

void loop() {
  // Reading potentiometer value
  potValue = analogRead(potPin);
  Serial.println(potValue);
  delay(500);

  // increase the LED brightness
  for(int dutyCycle = 0; dutyCycle <= 255; dutyCycle++){   
    // changing the LED brightness with PWM
    ledcWrite(ledChannel, dutyCycle);
    delay(15);
  }

  // decrease the LED brightness
  for(int dutyCycle = 255; dutyCycle >= 0; dutyCycle--){
    // changing the LED brightness with PWM
    ledcWrite(ledChannel, dutyCycle);   
    delay(15);
  }
  ledcWrite(ledChannel1, potValue/16);
}