Feed is working but when I click send - it shuts down the printer.

[Zaniyar]

is the code tested with the paperang 2? Because when I hit the "send" button it shuts down the printer.

[jmio]

No, I haven't tried it. (II don't have paperang2)

[Zaniyar]

what would be the steps to reverse-engineer it from the pc app? is there a software which can listen to all bluetooth messages send from my pc, so that I can mimic that in your app?

[jmio]

I'm not familiar with it, but why not try using wireshark?
https://tewarid.github.io/2020/08/20/analyze-bluetooth-protocols-on-windows-using-wireshark.html