void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(14, INPUT);
  pinMode(27, OUTPUT);
}

void loop() {
  digitalWrite(27, HIGH);
  delay(1000);
  digitalWrite(27, LOW);
  float duration =pulseIn(14, HIGH);
  int distance=duration*0.034/2;
  Serial.println(distance);
  delay(1000); 
}