Home
Creators
Search Recent Missing Random
Posts
Search DMs Popular Hash Lookup Tags Random
Importer
Import FAQ
Register Favorites Keys Review DMs Logout
Community
Telegram ThePornDude
Home Creators Posts Import Register Favorites Logout

[behind the scenes] Developing APRS decoding (Patreon)

Published:
2025-10-28 17:14:28
Imported:
2026-06
Tags:
haven't archived this post yet. have a subscription? use the importer!

Downloads

  • 555633393.mp4

Missing 1 video, as this post has not yet been imported.

Content

Just to show you all my process.

Comments

Tan Vachiramon

Thanks for sharing your process! One suggestion, spend some time now on your build system (let's say makefile) to have test/benchmarking targets. Then you can create test harnesses, one with test audio files and scripts, automatically generate the statistics you need to debug the issues you're having. Jumping back and forth between C and C# is looks painful, and you want to debug the decoder as close to the hardware as possible. You'll save a ton of time in the future. Q: is it possible to use the serial port as a serial monitor for debugging? Q: wonder if the SOC have a dsp? If so, there's potential to do matched filtering and get nice clean baseband signal for decoding.

nicsure
>>191849116

I actually do that, I stream the audio samples over serial to the PC, the C# test code can use that data to decode, that allows me to test radio audio. In fact I can hook in at any stage during decoding and hand off to the c# code, this allows me to interject at almost any part of the code running on the radio.

medal.bricks

So cool, I appreciate the peak behind the curtain! I’ve noticed a large improvement over time of how effectively your APRS code decodes. I haven’t checked the stock FW in a very long time, but I don’t they’ve even had any new updates in at least 6 months. I think Radtel abandoned the 880 and is just focusing on the 950

Kenneth Sessions

Just Blown away by your Coding Abilities! Got a RT-880 Coming Today!

Dekatron

Do you think you'll be able to extend this code to the 950 pro in the future or is that totally out of scope?

nicsure
>>192245729

Currently we know nothing about the 950, we need GPIO information from Radtel. So right now, your question is unanswerable.

Marco Schneider

As a amateur radio operator I say: APRS can be fun. What do you think: Is there free rom space available to build in a SSTV decoder?

nicsure
>>192460618

It's RAM that you need for that, although scanning directly to the display might work to mitigate that somewhat. SSTV is not something I've really researched. Would be cool though, for sure.

Eric Balandraud

Cool i try the new firmware later. So do you plan to implement tnc ? Is it possible ?