QTI sensors with Arduino Mega

kllow

Hi there,

I have just bought 6 pcs of QTI sensors to be used with Arduino Mega for follow 3M reflective line.

I have tried the code provided by Parallex but unfortunately it does not work. As I am new in programming, I would appreciate if somebody can give me advise on the coding for QTI sensors to be used together with Arduino Mega.

Thank you in advance.

cheers,
kl

Franklin

code provided by Parallex but unfortunately it does not work

Could you attach your code and tell us what "does not work"

GordonMcComb

Yes, you need to provide more info than "does not work."

In the meantime, this is demonstration code for testing one QTI. You'd effectively do this six times, on six different Arduino pins, and collect the data in some way to make the sensor comparison meaningful.

void setup() {
  Serial.begin(9600);
}

void loop() {
  Serial.println(RCTime(2));        // Connect to pin 2, display results
  delay(250);                // Wait 250ms
}

long RCTime(int sensorIn){
   long duration = 0;
   pinMode(sensorIn, OUTPUT);     // Make pin OUTPUT
   digitalWrite(sensorIn, HIGH);  // Pin HIGH (discharge capacitor)
   delay(1);                      // Wait 1ms
   pinMode(sensorIn, INPUT);      // Make pin INPUT
   digitalWrite(sensorIn, LOW);   // Turn off internal pullups
   while(digitalRead(sensorIn)){  // Wait for pin to go LOW
      duration++;
   }
   return duration;
} 

//'W - +5
//'B - Gnd
//'R - Signal

//Values are from about 55-1300

-- Gordon