Puck.js to emulate Lenovo mic on/off button

Hi!

I've been trying to use my Puck.js to emulate Lenovo keyboard microphone on/off button (f4), but cannot get it to work. I suppose that I need to somehow first tell the computer that my Puck.js is a lenovo keyboard and then send a right code.

I can see from the lenovo drivers that the code I should send is "0x00f1".
https://coral.googlesource.com/linux-imx/+/refs/tags/4-2/drivers/hid/hid-lenovo.c

Any ideas regarding this?

Here's my current code:

function p(c,cb) {
  NRF.sendHIDReport(c, function() {
    NRF.sendHIDReport(0, cb);
  });
}

setWatch(function(e) {
  // Measure length of the press
  var len = e.time - e.lastTime;

  p(0x00f1,function() {
    print('Done');
  });

  digitalPulse(LED3,1,100);

}, BTN, { edge:"falling",repeat:true,debounce:50});