[BUG] Messanger: Constant ERROR: INVALID PACKET flood.

[T1MOXA]

Describe the bug
When sending a message in messenger after receiving the message, it starts flooding with errors.

To Reproduce
Steps to reproduce the behavior:

1. Prepare two radios on the same frequency and same encryption key.
2. Go to messenger.
3. Type message.
4. Send message.
5. See error.

Expected behavior
There should be no error messages.

Pictures/video
https://github.com/kamilsss655/uv-k5-firmware-custom/assets/19938629/c5fda6e1-f9c9-46d6-941b-a29f05830603

Details:

• Firmware version: v20
• Bandwidth: 12.5K
• Power: L
• RxAGC: SLOW
• Gain settings (LNAs/LNA/PGA): ?
• other: Encryption key 0123456789

[kamilsss655]

Nice report!

There are 2 issues here:

1. The firmware has a bug where it ACKs the invalid packets, when it should only ACK valid ones.
2. You're receiving invalid packets because either/or:
   • your radios are too close to each other
   • your non-standard antennas affect the signal
   • your bandwidth is too narrow

[T1MOXA]

2. I've tested 25k bandwidth with no luck.
   Antenas have good SWR on selected frequency but I'il try the stock one.
   And on video I've tried move radio for about 1 meter away.

[T1MOXA]

UPD.
The same problem with stock antennas, BW 25k and distance between radios about 10 meters.

[kamilsss655]

Interesting, I tried reproducing it but I couldn't make it send invalid packet.

Can someone else confirm this?

[MrHoerby]

Ich hatte das auch gestern bei zwei Aussendungen, aber ich hatte beide Geräte in den Händen und die Bandbreite auf 5 kHz eingestellt. Leider ist die Schrift im Messenger zu klein und ich habe dann lieber die DTMF-Sachen im Makefile aktiviert.

[T1MOXA]

Looks like I found the cause.
It's in ROGER = MDC (39 Parameter in the menu)
With ROGER = Roger || ROGER = OFF, error gone.

[kamilsss655]

Awesome! I am glad you figured it out.

[kamilsss655]

I see you submitted a PR. Awesome! 🎉

I will review it tomorrow.