#include <ESP32Servo.h>
Servo servo;
int pos = 0;

void setup() {
  // put your setup code here, to run once:
  servo.attach(15);
  Serial.begin(115200);
}

void loop() {
  // put your main code here, to run repeatedly:
  for (pos = 0; pos <= 100; pos += 1) {
    // in step of 1 degree
    servo.write(pos);
    delay(15);
    Serial.println(pos);
  }
  for (pos = 100; pos >= 0; pos -= 1) {
    servo.write(pos);
    delay(15);
    Serial.println(pos);
  }
}