Espruino example

usbhid.js

var  on = false;
setInterval(function() {
  on = !on;
  LED1.write(on);
  LED2.write(!on);
}, 500);

console.log('Hello, world!');

E.setUSBHID({
  reportDescriptor : [
  0x05,   0x01,
  0x09,   0x02,
  0xA1,   0x01,
  0x09,   0x01,

  0xA1,   0x00,
  0x05,   0x09,
  0x19,   0x01,
  0x29,   0x03,

  0x15,   0x00,
  0x25,   0x01,
  0x95,   0x03,
  0x75,   0x01,

  0x81,   0x02,
  0x95,   0x01,
  0x75,   0x05,
  0x81,   0x01,

  0x05,   0x01,
  0x09,   0x30,
  0x09,   0x31,
  0x09,   0x38,

  0x15,   0x81,
  0x25,   0x7F,
  0x75,   0x08,
  0x95,   0x03,

  0x81,   0x06,
  0xC0,   0x09,
  0x3c,   0x05,
  0xff,   0x09,

  0x01,   0x15,
  0x00,   0x25,
  0x01,   0x75,
  0x01,   0x95,

  0x02,   0xb1,
  0x22,   0x75,
  0x06,   0x95,
  0x01,   0xb1,

  0x01,   0xc0]
});

function random(min, max) {
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

setInterval(function() {
  var dx = random(0, 20);
  var dy = random(0, 20);
  console.log('DX=', dx, 'DY=', dy);
  E.sendUSBHID([0, dx,dy,0]);
}, 1000);