Puck.js NFC

nfc.js

var buttonState = false;
var flashing = false;

setWatch(function () {
    if (flashing) return;
    var batteryPercentage = Puck.getBatteryPercentage();
    buttonState = buttonState ? false : true;
    if (buttonState) {
      flashLed(LED2, 200, 1);
      NRF.nfcURL("http://cosmiquecarrousel.com");
    } else {
      flashLed(LED1, 200, Math.round(batteryPercentage/10));
      NRF.nfcStop();
    }
}, BTN, { edge: "rising", repeat: 1, debounce: 20 });

function flashLed(led, delay, times) {
  flashing = true;
  var t = times ? times : 1;
  var counter = 0;
  var flashInterval = setInterval(function() {
    if (counter % 2) {
      led.reset();
    } else {
      led.set();
    }
    counter++;
    if (counter >= t*2) {
      clearInterval(flashInterval);
      counter = 0;
      flashing = false;
    }
  }, delay);
}