#include <ESP32Servo.h>
#define SERVO_PIN 19 
Servo servoMotor;
void setup() {
    servoMotor.attach(SERVO_PIN); 
}

void loop() {

    for (int pos = 0; pos <= 180; pos += 1) { 
        // in steps of 1 degree
        servoMotor.write(pos);
        delay(15); 
    }

    for (int pos = 180; pos >= 0; pos -= 1) {
        servoMotor.write(pos);
        delay(15); 
    }
}