#include <ESP32Servo.h>
const int servoPin = 15;
Servo servo;
int pos = 0;

void setup() {
// put your setup code here, to run once:
Serial.begin(115200);
Serial.println("Hello, ESP321");
servo.attach(servoPin, 500, 2400);
}

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);
// }
servo.write(0); 
delay(1000); 
servo.write(90); 
delay(1000);
}