IRTarget

gistfile1.c

String inString = "";    // string to hold input

// constants won't change. Used here to 
// set pin numbers:
const int ledPin =  13, irTarget = 2;      // the number of the LED pin

// Variables will change:
int ledState = LOW;             // ledState used to set the LED
long previousMillis = 0;        // will store last time LED was updated

// the follow variables is a long because the time, measured in miliseconds,
// will quickly become a bigger number than can be stored in an int.
long interval = 0;           // interval at which to blink (milliseconds)


void setup() {
  // Initialize serial communications:
  Serial.begin(9600);
  pinMode(ledPin, OUTPUT);
  pinMode(irTarget, OUTPUT); 
}

void loop() {
  // here is where you'd put code that needs to be running all the time.

  // Read serial input:
  while (Serial.available() > 0) {
    int inChar = Serial.read();
    if (isDigit(inChar)) {
      // convert the incoming byte to a char 
      // and add it to the string:
      inString += (char)inChar; 
    }
    // if you get a newline, print the string,
    // then the string's value:
    if (inChar == '\n') {
      Serial.print("Value:");
      Serial.println(inString.toInt());
      interval = inString.toInt();
      Serial.print("String: ");
      Serial.println(inString);

      // clear the string for new input:
      inString = ""; 
    }
  }

  // check to see if it's time to blink the LED; that is, if the 
  // difference between the current time and last time you blinked 
  // the LED is bigger than the interval at which you want to 
  // blink the LED.
  unsigned long currentMillis = millis();

  if(currentMillis - previousMillis > interval) {
    // save the last time you blinked the LED 
    ledState = HIGH;
    previousMillis = currentMillis; 
    interval = 0;
  }
  else ledState = LOW;
  // set the LED with the ledState of the variable:
  digitalWrite(ledPin, ledState);
  digitalWrite(irTarget, ledState);

  Serial.println(interval);
}