OpenGD77

EA4IAU wrote: ↑

Mon Jul 07, 2025 10:18 pm

Hello everyone

(I know i was instructed to post things about the silent DMR and helicoptering issues on the stable release thread, but it felt odd to get in too much detail on that thread)

I’ve spent some weeks trying out stuff to see if I could just get my DM1701 to work reliably again. (I am referring to the mute DMR issue and the helicoptering issue).

I’m going to list a couple of things that didn’t work, one thing that DID work, and a thing that was just… weird.

What didn’t work:

• Changing the Eco level

• Setting the beep options to prompt, no keys or silent. DIdn’t matter

• Choosing a wider Offset between RX and TX frequency in my duplex hotspot. …Nope.

What DID work:
Setting the hotspot to SIMPLEX

I have been using my hotspot in simplex mode, TXing with 50mW and getting transmissions back, complete, with no audio glitches whatsoever.

Here is, however, a thing that is very weird, that you can repeatably do (I did it with my hotspot buy I assume it can be done with 2 radios):

• Set TS1 of your hotspot to a TG that is very busy

• Set the radio to TS filter OFF, but select the TS2, using the asterisk key

• Wait for someone to talk in that busy TG, which will make the radio play the TS1 transmission, despite being set to TS2

• Now change to TS1 by pressing asterisk. The radio will go completely silent despite being set to the correct TS

• Change back to TS2, the radio will talk again. It can also happen that it will become silent, somewhat replicating the issue

Whatever this issue is, it’s rooted in the way OpenGD77 handles incoming transmissions when there is timeslot information, and it’s somehow worsened if TS filter is off.

Haven’t gone around inspecting the code to try to be more helpful yet. If I manage to make sense of it and get a clue on what could be happening, I will be posting here.

TS Filter off activate a software algorithm that tries to find traffic regardless of the timeslot:

TS Filter (DMR mode only)

Controls whether the radio filters by Timeslot.

Use the Right or Left arrows to enable or disable.
When Timeslot filtering is disabled the Timeslot number is displayed in inverse video.

Notes:

This feature does not actually disable a filter, because the DMR hardware chip, HR-C6000, does not fully support reception of signals on both timeslots at the same time.
This feature uses a software algorithm written by Daniel F1RMB, which initially listens for caller ID data on both timeslots, and when valid data occurs on a timeslot, the firmware just listens on that timeslot.
If caller ID is not present on the received timeslot for a timeout period of approximately 2.5 seconds, the algorithm checks on the other timeslot and switches to that if caller ID data is on that timeslot.

I guess that algororithm may detect it wrong sometimes ?

Perhaps the algorithm has something wrong with it, but it’s not the whole problem, as I also observed the issue when TS filter is on.

It just makes it more likely to happen. (although I haven’t measured that thoroughly)

I hope somebody could auditing the source code could find where the issue is and fix it, because is being really annoying, especially with Motorola repeaters that have various TG in different slots.

MELERIX wrote: ↑

Tue Jul 08, 2025 10:18 pm

I hope somebody could auditing the source code could find where the issue is and fix it, because is being really annoying, especially with Motorola repeaters that have various TG in different slots.

Try installing the older betas and find the version where this problem first started to happen

VK3KYY wrote: ↑

Tue Jul 08, 2025 10:46 pm

MELERIX wrote: ↑

Tue Jul 08, 2025 10:18 pm

I hope somebody could auditing the source code could find where the issue is and fix it, because is being really annoying, especially with Motorola repeaters that have various TG in different slots.

Try installing the older betas and find the version where this problem first started to happen

I'd love to do this. The problem needs to be among the last stable and the previous one.

VK3KYY, can you redirect me to the beta directories? (Sorry, i keep getting lost on the repos, havent got the hang of the folder structure)

Are they compiled or is it just the source code?

EA4IAU wrote: ↑

Wed Jul 09, 2025 9:42 am

VK3KYY wrote: ↑

Tue Jul 08, 2025 10:46 pm

MELERIX wrote: ↑

Tue Jul 08, 2025 10:18 pm

I hope somebody could auditing the source code could find where the issue is and fix it, because is being really annoying, especially with Motorola repeaters that have various TG in different slots.

Try installing the older betas and find the version where this problem first started to happen

I'd love to do this. The problem needs to be among the last stable and the previous one.

VK3KYY, can you redirect me to the beta directories? (Sorry, i keep getting lost on the repos, havent got the hang of the folder structure)

Are they compiled or is it just the source code?

What radio model do you use ?

I have collected most of the files for several models since 2022.

SA0BUX wrote: ↑

Wed Jul 09, 2025 11:06 am

EA4IAU wrote: ↑

Wed Jul 09, 2025 9:42 am

VK3KYY wrote: ↑

Tue Jul 08, 2025 10:46 pm

Try installing the older betas and find the version where this problem first started to happen

I'd love to do this. The problem needs to be among the last stable and the previous one.

VK3KYY, can you redirect me to the beta directories? (Sorry, i keep getting lost on the repos, havent got the hang of the folder structure)

Are they compiled or is it just the source code?

What radio model do you use ?

I have collected most of the files for several models since 2022.

It's the DM1701. Radio info reports CPU rev 0x0009. I dont know where to look to discern if there are some other hardware revisions

EA4IAU wrote: ↑

Wed Jul 09, 2025 3:56 pm

SA0BUX wrote: ↑

Wed Jul 09, 2025 11:06 am

EA4IAU wrote: ↑

Wed Jul 09, 2025 9:42 am

I'd love to do this. The problem needs to be among the last stable and the previous one.

VK3KYY, can you redirect me to the beta directories? (Sorry, i keep getting lost on the repos, havent got the hang of the folder structure)

Are they compiled or is it just the source code?

What radio model do you use ?

I have collected most of the files for several models since 2022.

It's the DM1701. Radio info reports CPU rev 0x0009. I dont know where to look to discern if there are some other hardware revisions

That's one of my later ones I bought , I have more files for MD-UV380/RT-3S and MD-9600 but I can send you a list of what I have.

SA0BUX wrote: ↑

Wed Jul 09, 2025 4:21 pm

EA4IAU wrote: ↑

Wed Jul 09, 2025 3:56 pm

SA0BUX wrote: ↑

Wed Jul 09, 2025 11:06 am

What radio model do you use ?

I have collected most of the files for several models since 2022.

It's the DM1701. Radio info reports CPU rev 0x0009. I dont know where to look to discern if there are some other hardware revisions

That's one of my later ones I bought , I have more files for MD-UV380/RT-3S and MD-9600 but I can send you a list of what I have.

20230311-OpenDM1701.bin
20230409-OpenDM1701.bin
20230423-OpenDM1701.bin
20230509-OpenDM1701.bin
20230702-OpenDM1701.bin
20230715-OpenDM1701.bin
20230809-OpenDM1701.bin
20230818-OpenDM1701.bin
20230903-OpenDM1701.zip
20230904-OpenDM1701.zip
20230915-OpenDM1701.zip
20231119-OpenDM1701.zip
20231202-OpenDM1701.zip
20231208-OpenDM1701.zip
20231212-OpenDM1701.zip
20231231-OpenDM1701.zip
20240317-OpenDM1701.zip
20240329-OpenDM1701.zip
20240412-OpenDM1701.zip
20240511-OpenDM1701.zip
20240623-OpenDM1701.zip
20240630-OpenDM1701.zip
20240803-OpenDM1701.zip
20241009-OpenDM1701.zip
20241009-OpenRT84.zip
20241018-OpenDM1701.zip
20241018-OpenRT84.zip
20241212-OpenDM1701.zip
20241212-OpenRT84.zip
20241215-OpenDM1701.zip
20241215-OpenRT84.zip
R20240908-OpenDM1701.zip
R20240908-OpenRT84.zip
20250119-OpenDM1701.zip
20250119-OpenRT84.zip
20250122-OpenDM1701.zip
20250122-OpenRT84.zip
20250126-OpenDM1701.zip
20250126-OpenRT84.zip
20250128-OpenDM1701.zip
20250128-OpenRT84.zip
20250207-OpenDM1701.zip
20250207-OpenRT84.zip
20250215-OpenDM1701.zip
20250215-OpenRT84.zip
20250223-OpenDM1701.zip
20250223-OpenRT84.zip
20250316-OpenDM1701.zip
20250316-OpenRT84.zip
20250323-OpenDM1701.zip
20250323-OpenRT84.zip

That list would be fine-grained enough, I'd only need the betas that were made from the last stable to the previous stable, and only for the DM1701.

VK3KYY, which ones are those? When was the previous stable released?