app.js

var hid = require('node-hid');
// var BitArray = require('node-bitarray');
// console.log(hid.devices());

// Logitech Extreme 3D Pro's vendorID and productID: 1133:49685 (i.e. 046d:c215)
var device = new hid.HID(1133, 49685);
// console.log(device);

device.on('data', function (buf) {

  var ch = buf.toString('hex').match(/.{1,2}/g).map(function (c) {
    return parseInt(c, 16);
  });

  var controls = {
    roll: ((ch[1] & 0x03) << 8) + ch[0],
    pitch: ((ch[2] & 0x0f) << 6) + ((ch[1] & 0xfc) >> 2),
    yaw: ch[3],
    view: (ch[2] & 0xf0) >> 4,
    throttle: -ch[5] + 255,
    buttons: [
      (ch[4] & 0x01) >> 0,
      (ch[4] & 0x02) >> 1,
      (ch[4] & 0x04) >> 2,
      (ch[4] & 0x08) >> 3,
      (ch[4] & 0x10) >> 4,
      (ch[4] & 0x20) >> 5,
      (ch[4] & 0x40) >> 6,
      (ch[4] & 0x80) >> 7,

      (ch[6] & 0x01) >> 0,
      (ch[6] & 0x02) >> 1,
      (ch[6] & 0x04) >> 2,
      (ch[6] & 0x08) >> 3
    ]
  };

  // var bits = BitArray.fromBuffer(buf).toJSON().join('').match(/.{1,8}/g).join(' ');
  // console.log(bits, JSON.stringify(controls));
  console.log(JSON.stringify(controls));
});