#include <ESP32Servo.h>
bool 
const int servoPin = 12;
Servo servo;

const int echo_pin=27,trig_pin=2;
#define led 19
void setup() 
{
  servo.attach(servoPin, 500, 2400);
  pinMode(echo_pin, INPUT);
  pinMode(trig_pin,OUTPUT);
  pinMode(led, OUTPUT);
  //clear the trigger
  digitalWrite(trig_pin,LOW);
  delayMicroseconds(2);
  Serial.begin(115200);
}

void loop() 
{
digitalWrite(trig_pin,HIGH);
delayMicroseconds(10);
digitalWrite(trig_pin, LOW);
//read the length of HIGH pulse in microseconds
long duration=pulseIn(echo_pin,HIGH);
//Serial.println("Distance in cm:");
//Serial.println(duration/58);
delay(100);

if(duration/58 <= 200)
  {
    digitalWrite(led, HIGH);
    servo.write(90);
    /*delay(250);
    servo.write(0);
    delay(250);
    servo.write(90);
    delay(250);
    servo.write(0);
    delay(500);*/
  }
  else
  {
    digitalWrite(led, LOW);
    servo.write(0);
  }
}