I have a note from Johnathan about his project. See Below!!
I converted the MMDVM NXDN implementation over to very-narrow mode, aka NXDN 4800. I decided not to make it switchable to NXDN 9600 as it would then mean that people could choose to make their systems incompatible with existing networks. So NXDN 4800 it is.
It’s all been checked into GitHub for both the MMDVMHost and MMDVM firmware under the nxdn branch.
Currently it’ll be an RF only repeater, but it will allow you to play. I intend to get a simple NXDN reflector active and make a simple NXDN parrot available too. This will allow basic testing and communication until we can do something better.
There is a bug in the display code, maybe Nextion only, where the screen doesn’t update correctly at the end of a transmission, and I can’t find it! So any takers to look at that would be appreciated.
I’ve asked Andy CA6JAU to review my new filters for NXDN 4800 to make sure that they’re correct and that I have transmit amplitude (deviation) correct also. Even if they aren’t, you can try installing it and talking to yourself.