Wojciech Kaczmarski

M17 text messages support

40

Is dsd-fme capable of decoding text messages? There's a need for working replacement for SDRAngel's decoder, as it's heavily bugged.

M17 support

1

I see NXDN and D-STAR might eventually be added. What about M17? BTW: https://github.com/M17-Project/libm17

Buffering issue

4

"arecord ... | m17-mod ... > dump.raw" generates exactly 280ms of baseband, everytime.

Packet mode CRC

2

CRC in the packet mode is calculated over the type indicator and payload. It includes the terminating null byte (in the case of SMS). Make sure that's mentioned in the...

Volume potentiometer

5

Are we going to use the same pot as in Module17? With an ON/OFF switch.

PCB stackup

1

Define 4-layer PCB stackup.

Probably an incorrect SD card holder footprint

1

Set it to the correct one.

Use RS-485 instead of raw 3.3V UART for improved noise immunity.

m17_decoder block doesn't work with noisy symbol streams

2

How to reproduce: 1. Run `examples/m17_loopback_noisy.grc` 2. Observe how the decoder works with no noise applied to the symbol stream (default state). 3. Add a little Gaussian noise to the...