#include <ESP32Servo.h>

const int servoPin = 18;
Servo myservo;

void setup() {
  myservo.attach(servoPin);
  myservo.write(0);
  Serial.begin(115200);
}

void loop() {
  Serial.println("Moving to 90 degrees");
  myservo.write(90);
  delay(1000);
  Serial.println("Moving to 0 degrees");
  myservo.write(0);
  delay(1000);
}