#include <ESP32Servo.h>

Servo servo;

void setup() {
  Serial.begin(115200);
  servo.attach(13);
  pinMode(4, INPUT);
  pinMode(15, OUTPUT);

}

void loop() {

  // Start a new measurement:
  digitalWrite(15, HIGH);
  delayMicroseconds(10);
  digitalWrite(15, LOW);

  // Read the result:
  int d = pulseIn(4, HIGH);
  Serial.print("Distance in CM: ");
  Serial.println(d / 58);
  delay(1000);
  int cm = d / 58;

  if (cm <= 200) {
  servo.write(180);
    delay(3000);


  } else {
    servo.write(0);
    delay(1000);

  }

} //////////// END LOOP