Incorrect APRS Format packet being generated

[ab0oo]

https://github.com/dl9rdz/rdz_ttgo_sonde/blob/27d342ae0e8a184b91a063b25c2367e34c5316c9/RX_FSK/src/aprs.cpp#L279

Saw this packet come across APRS-IS tonight: ON2KGC-5>APRRDZ,TCPIP*,qAC,T2BELGIUM:!5035.56N00553.63EON2KGC-13 rdzTTGOsonde-devel20230427 it looks to be invalid and unparsable. !5034.56N <Symbol Table Identifier Missing>00553.63E <Symbol Code missing> ON2KGC-13..... Should be a pretty quick fix. I see another radiosonde tracker: PANHA2-15>APNL51,TCPIP*,qAI,PANHA2-15,SQ6KXY-1,EIGHTH,NINTH:!4740.10N/01738.11E`Radiosonde Tracker - Based on kxyTrack 1.5.2-dxl_smod136h using / for the symbol table and ` for the Symbol.

[hr-ru]

Ok, thanks. This seems to be more a configuration problem than a software problem. I assume that the symbol table and symbol is empty in the sender's configuration. But maybe I can add some check and make the software use a default symbol if the configured symbol is invalid...

[ab0oo]

Ah, I didn't look to see that it was user-configured. Just an education issue more than a code issue. abouit 4% of the packets on APRS-IS are malformed, so this is a drop in a very deep bucket.

[dl9rdz]

Finally added this check to the code, will be available in the next dev release, so I expect that we will not see this issue with that version any more. Closing this isse...