void setup()
{
Serial.begin(9600);
}
void loop()
{
Serial.println(analogRead(0));
delay(1000);
}
This right here you can measure the distance and write down what the number is for each distance.
int LED =13;
void setup()
{
pinMode(LED, OUTPUT);
}
void loop()
{
int distance = analogRead(0);
if ( distance == 321 )
{
digitalWrite(LED,HIGH);
}
else
{
digitalWrite(LED,LOW);
}
}
Here is just something to turn and Led on when it equal to the distance I got from the serial print which is 3 inch, yours might be a tad bit different number. Sorry took so long to get back. Let me know if you have any othe question and I will try to help you out.