int triger = 17;
int echo = 16;

void setup() {

  Serial.begin(115200);
  pinMode(triger, OUTPUT);
  pinMode(echo,INPUT);
  
}
void loop() {
  digitalWrite(triger, HIGH);
  delay(100);
  digitalWrite(triger, LOW);
  int reading = pulseIn(echo,HIGH);
  int distance = (reading*0.034/2);
  Serial.println(distance);
}