How to encode Floats in BLE advertisements ?

Hey there!
I'm using NRF.setAdvertising() to advertise temperature readings from Puck.js.
The examples in docs sadly only mention byte arrays, integers and string fragments as supported data:

// straight from official docs
setInterval(function() {
  NRF.setAdvertising({
    0x1809 : [Math.round(E.getTemperature())]
  });
}, 30000);

What I'm trying to do is advertise the floating point temperature without rounding. Puck currently reports temperature with 0.25 accuracy, but I'm struggling with how to encode it in a way, that would make EspruinoHub understand it.

The official BLE GATT spec for thermometer actually supports extra flags in the first byte and temp. reading (default is Celsius) as a Float32.

The node on puck doesn't sadly provide Buffer so I tried encoding with TypedArrays like so:

setInterval(function() {
  NRF.setAdvertising({
    0x1809 : temperatureAsArray()
  });
}, 30000);

function temperatureAsArray() {
  const a = new Float32Array(1);
  a[0] = E.getTemperature();
  const b = new Uint8Array(a.buffer);
  const c = new Uint8Array(5);
  c[0] = 0;    // the first byte set to 0 means a single celsius measurement without timestamp
 // I've also tried without this byte, didn't change anything
  c.set(b, 1);
  const result = [];
  
  for (let x = 0; x < c.length; x ++) {
    result[x] = c[x];
  }

  return result;
}

The resulting array is something like: [0, 0, 0, 236, 65] for temperature of around 21 deg, or [0, 0, 236, 65] if you don't include the "flags" byte and just have BE 32-bit float.

However, when I receive it in EspruinoHUB, the debug shows me:

d1:bf:fb:93:39:bf - Puck.js (RSSI -57)
  1809 => {"temp":0}

It seems to struggle to decode those Float32 byte arrays.
When I sent something like [236, 65] (without the GATT flags and trimmed to just 2 bytes) then it shows me:

d1:bf:fb:93:39:bf - Puck.js (RSSI -57)
  1809 => {"temp":168.76}

I have no idea how it got 168.75 from those bytes.

Any idea what EspruinoHub/Noble/bleno expect as a format for floats?

Have anyone succeeded in encoding floats for BLE Adv. ?