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


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

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