LoRa packet header documentation

[ge0rg]

Hi, I was wondering about the on-the-wire-format of LoRa packets containing APRS.

It looks like this code is generating the header, consisting of:

• verbatim "<"
• sender's ID (byte) - is that ever initialized anywhere?
• 0x01 byte

What is the meaning of the "<" and of the 0x01? It looks like the regular LoRa header is four bytes (to, from, ID, flags) - why is the APRS header shorter? Why are we not using to=0xff (broadcast)?

[oe3cjb]

this was just copied from another code and so I don't know :-(