#include <ESP32Servo.h>

const int ledPin = 16;

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

const uint8_t btnPin = 2;

Servo myservo;
float pos = 0.0; // Variable where the arm's position will be stored (in degrees)
float step = 1.0; // Variable used for the arm's position step
int servoPin = 16;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  // configure LED PWM functionalitites
  ledcSetup(ledChannel, freq, resolution);

  // attach the channel to the GPIO to be controlled
  ledcAttachPin(ledPin, ledChannel);

  pinMode(btnPin, INPUT);

  myservo.setPeriodHertz(50);    // standard 50 hz servo
  myservo.attach(servoPin, 500, 200);

}

void loop() {
  // put your main code here, to run repeatedly:
  delay(50); // this speeds up the simulation

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

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

  pos += 10;
  myservo.write(pos);
  Serial.println(pos);
  if (pos > 120) {
    pos = 0;
  }

}