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This example is for Wiring version 1.0 build 0100+. If you have a previous version, use the examples included with your software. If you see any errors or have comments, please let us know.

Blink the Wiring board LED by BARRAGAN http://barraganstudio.com
turns on and off the Wiring board LED, with intervals of 1 second (1000 milliseconds). For the Wiring boards v1 the on-board LED is on pin 48, on Wiring S the on-board LED is on pin 15. it is also possible to use the WLED constant with the digitalWrite command: digitalWrite(WLED, HIGH). WLED will be the correct pin in the current board selected in the Tools -> Board menu.

    // blinks the board LED, use 48 for Wiring 1.0 boards, use pin 15
    // for Wiring S

    void setup()
    {
      pinMode(WLED, OUTPUT);  // set pin as output
    }

    void loop()
    {
      digitalWrite(WLED, HIGH);  // set the LED on
      delay(1000);               // wait for a second
      digitalWrite(WLED, LOW);   // set the LED off
      delay(1000);               // wait for a second
    }