#include <ESP32Servo.h>

Servo servo;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  servo.attach(18, 500, 2400);
}

void loop() {
  for (int pos = 0; pos <= 180; pos++) {
    servo.write(pos);
    delay(30);
  } 
  for (int pos = 180; pos >= 0; pos--) {
    servo.write(pos);
    delay(5);
  } 
}