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(10);
}
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);
}