PowerPoint presenter using a Puck.js beacon's button only!

puck_pp_presenter-v2.js

var kb = require("ble_hid_keyboard");
NRF.setServices(undefined, { hid : kb.report });
var reset_timer;
var next = "n";
var prev = "p";


function sendPrev(){
  sendCharPrev();
  LED2.set();
  setTimeout("LED2.reset()",1000);
}

function sendNext(){
  sendCharNext();
  LED2.set();
  setTimeout("LED2.reset()",1000);
}

function sendCharNext(){
        if (next == next.toLowerCase()){
            sk = 0;
        } else {
            sk = 0x02;
        }
        // send the "n" keyboard character
        kb.tap(kb.KEY[next.toUpperCase()], sk);
}

function sendCharPrev(){
        if (prev == prev.toLowerCase()){
            sk = 0;
        } else {
            sk = 0x02;
        }
        // send the "p" keyboard character
        kb.tap(kb.KEY[prev.toUpperCase()], sk);
}

setWatch(function(e) {
  if(e.time-e.lastTime > 0.5){ // on long press slide goes one step back
    sendPrev();
  }
}, BTN, {edge:"falling", debounce:50, repeat:true});

setWatch(function(e) {
  if(e.time-e.lastTime < 0.5){ // on short press slide goes one step forward
    sendNext();
  }
}, BTN, {edge:"falling", debounce:50, repeat:true});