What is it?

Interfaces/compatible with a certain Barcode app.
Starts a websocket server on port 57891.
Discoverable by zeroconf.
Prints the received data.

Prerequisites

python3.7 -m pip install zeroconf aiohttp

(tested on python3.7, MacOS)

Disclaimer

No warranty.
No support.
No liability.
You are free to use this python code.