PE0SAT, thank you very much! This is our frame. First five bytes here is our header generated for every message. They can be cut off. Here is message from our beacon. Starting from 0x84 is our payload message in AX.25 format.
Destination - BEACON with SSID 0:
84 8a 82 86 9e 9c 60
Source - RS20S with SSID 0:
a4 a6 64 60 a6 40 60
Control byte and PID:
03 f0
And then data till 0’s, kaitai decoder for which we can integrate in Satnogs.