US-100 Ultrasonic Sensor help needed

Using Arduino Programming Questions
1

I have a project I am working on, but I can not get the ultrasonic sensor to work.
It's the US-100
with 5Volt+, Trig, Echo, Ground, Ground
I have all five wires hooked up correctly.

It returns:
"Out of range
0 cm"

Code as follows:

#define trigPin 5
#define echoPin 7

void setup()
{
Serial.begin (9600);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
}

void loop()
{
int reset = (3000);
int duration, distance;
digitalWrite(trigPin, HIGH);
delayMicroseconds(500); //was 1000 - does not appear to make a difference
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = (duration/2) / 29.1;
if (distance >= 200 || distance <= 0)
{
Serial.println("Out of range");
Serial.print(distance); //Added
Serial.println(" cm"); //Added
}
else
{
Serial.print(distance);
Serial.println(" cm");
}
delay(500);
}

2

Hello,

Instead of:

int duration, distance;
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(500);                 //was 1000 - does not appear to make a difference
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = (duration/2) / 29.1;

Try:

   long duration, distance;
   digitalWrite(trigPin, LOW); 
   delayMicroseconds(2); //2ms delay
   digitalWrite(trigPin, HIGH);
   delayMicroseconds(10); //10ms delay
   digitalWrite(trigPin, LOW);
   duration = pulseIn(echoPin, HIGH); 
   distance = (duration/2) / 29.1;

Tell me if it worked