Problem reading ultrasonic sensor

[arrz]

so, I'm a compleetly new to arduino and I am trying to figure out a HC-SR04 ultrasonic sensor.
I have this easy code:

const int trig = 6;
const int echo = 5;

long totaltime;
int distance;

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

}

void loop()
{
  digitalWrite(trig, LOW);
  delayMicroseconds(2);

  digitalWrite(trig, HIGH);
  delayMicroseconds (20);
  digitalWrite(trig, LOW);

  totaltime = pulseIn(echo, HIGH);

  distance= totaltime*0.034/2;

  Serial.print("Distance:");
  Serial.println(distance);
}

But there is a problem reading, inbetween every read it does he turns off or something and reads a zero. I cannot figure out the problem, so has anyone else an idea of a solution?

[Paul_KD7HB]

@arrz

totaltime = pulseIn(echo, HIGH);

Seems like I just answered this question on another thread.

Read the documentation for pulseln() and you will see the source of your problem.