int trig =13;
int echo = 14;
long distance , duration;


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

void loop() {
  digitalWrite(trig, LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  duration = pulseIn(echo,HIGH);
  distance = (duration * 0.034)/2+1;
  Serial.println(distance);
  delay(2000);
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}