#include <ESP32Servo.h>
#define TRIG_PIN 16
#define ECHO_PIN 2
Servo myServo;
void setup() {
  myServo.attach(4);
  Serial.begin(115200);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
}
void loop() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  long duration = pulseIn(ECHO_PIN, HIGH);
  int distance = duration * 0.034 / 2;
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");
  if (distance < 150) {
    myServo.write(90);
  } else {
    myServo.write(0);
  }
  delay(2000);
}