const int trig = 3;
const int echo = 2;
long dur;
int dist;


void setup() {
	Serial.begin(9600);
	pinMode(trig,OUTPUT);
}

void loop() {
	digitalWrite(trig,LOW);
	delayMicroseconds(2);
	digitalWrite(trig,HIGH);
	delayMicroseconds(10);
	digitalWrite(trig,LOW);
	
	dur = pulseIn(echo,HIGH);
	dist=dur*0.0343/2;
	if (!dist) {
		Serial.println("Something went wrong :(");
	}
	else {
		Serial.println(dist);
	}
}