// Ultrasonic Sensor

int trig = 4;
int echo = 0;

int timeInMicro;

void setup() {
  Serial.begin(115200);

  pinMode(trig,OUTPUT);
  pinMode(echo,INPUT);
}

void loop() {

digitalWrite(trig,LOW);
delayMicroseconds(2);
digitalWrite(trig, HIGH);
delayMicroseconds(10);
digitalWrite(trig,LOW);

timeInMicro = pulseIn(echo,HIGH);
int distanceInCm = timeInMicro /29 /2;
Serial.println(distanceInCm);

delay(200);
}