const int tri=13;
const int eco=12;
long dur;
float dis;

void setup() {
 
  Serial.begin(115200);
  pinMode(tri, OUTPUT);
  pinMode(eco, INPUT);
}

void loop() {
  dis=getdistance();
  Serial.println("Distance :"+String(dis));
  delay(1000);
}
long getdistance()
{
  digitalWrite(tri, LOW);
  delayMicroseconds(2);
  digitalWrite(tri, HIGH);
  delay(10);
  digitalWrite(tri, LOW);
  dur=pulseIn(eco, HIGH);
  return((dur*0.034/2)+1);
}