const byte trig_pin = 12;
const byte echo_pin = 14;



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

  pinMode(trig_pin, OUTPUT);
  pinMode(echo_pin, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  
  int distance = get_distance();
  Serial.println(distance);
  delay(10); // this speeds up the simulation
}

int get_distance(){
  digitalWrite(trig_pin, LOW);
  delayMicroseconds(2);

  digitalWrite(trig_pin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig_pin, LOW);

  long int duration = pulseIn(echo_pin, HIGH);
  float sound_speed = 0.034;
  long int distance = (duration * sound_speed) / 2;

  return distance;
}