void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(12, OUTPUT);
  pinMode(14, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(12, HIGH);
  delay(50);
  digitalWrite(12, LOW);
  float duration = pulseIn(14,HIGH);
 int distance= duration*0.034/2;
 Serial.println(distance);

}