#include <ESP32Servo.h>
const int servoPin=19;
Servo servo;
void setup()
{
  servo.attach(servoPin,500,2400);
}
int pos=0;
void loop()
{ 
  for (pos=0;pos<=180;pos+=1)
  {
  servo.write(pos);
  delay(15);
  } 
  for (pos=180;pos>=0;pos-=1)
  {
  servo.write(pos);
  delay(15);
  } 
}