int trig =12;
int echo =13;
int distance ;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(trig,OUTPUT);
  pinMode(echo,OUTPUT);
  
}

void loop() {
  digitalWrite(trig, HIGH);
  delay(100);
  digitalWrite(trig, LOW);
  int reading = (pulseIn(echo,HIGH));
distance = (reading*0.034/2);
Serial.println("ok,recived");
Serial.println(distance);

  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}