#include <ESP32Servo.h>
 
Servo myservo;  // create servo object to control a servo
 
// Recommended PWM GPIO pins on the ESP32 include 2,4,12-19,21-23,25-27,32-33 
int servoPin = 23;
 
void setup() {
  myservo.setPeriodHertz(10); 
  myservo.attach(servoPin);
}
 
void loop() {
  myservo.write(90); 
  delay(500);
  myservo.write(180);
  delay(500);
}