Help with radio's DMR / hotspot settings - OpenGD77

Sorry for the long post. I am trying to get as many details out to help answer questions. I did download the GD77 manual and read it entirely, but I am sure I don't understand it completely.

I have a MD - UV390 Plus 10W that I bought specifically for DMR. I am new to DMR, and I had a friend help me get set up. I am using a MMDVM duplex (running as simplex) with a Pi zero 2W board and WPSD software. I am in the USA and currently signed into Brandmeister and TGIF, and using / have several TG’s set up using each of those networks.

The issue I have is that I am not hearing all traffic coming through. It comes and goes. I can see traffic on my WPSD dashboard and will have previously been listening to it, but then I don't hear anything. It is not a cell phone signal issue (using my phone's hotspot). It acts similarly when connected to home Wifi with a router and cable modem data as well.

At first I thought it was a dynamic / static talkgroup issue, but I don't think that's the problem.

I will be having a conversation with someone and everything is normal, then all the sudden I can't get through anymore. I can see their call and info come on the screen of the MMDVM and see their transmission in the WPSD dashboard, but there will be no audio. I cannot TX either - I will no longer show up in WPSD or the hotpsot itself. Sometimes it takes rebooting the MMDVM to get it back working again. This and other issues could mean a MMDVM / WPSD issue, but I just wanted to put every detail I can think of.out there.

Other symptoms are that sometimes I hear audio for hours at a time with the green receive light, and other times I don't hear anything for hours, even though the green receive light is active and I can see traffic on both the MMDVM screen and WPSD dahboard. I don't think it is a static / dynamic TG issue because it does this whether I hit PTT to “enter or activate” the TG or not.

I'm sure this is normal operation, but I can physically turn the channel or TG with the knob up top, but I can still be receiving traffic from another TG on a different channel or TG. Ideally, if I turn off of that channel or TG, I'd like to not hear it anymore or hear traffic from a different TG etc.

For what it's worth, I am only concerned about DMR channels and TG’s / digital Operation. Anything the radio is doing analog is working fine, so I’m just concerned about menu options or anything that affects the digital side.

Here is info on the quick menu, if it helps at all.

Quick menu settings
Channel → VFO
VFO → Channel
Filter: CTCSS:DCS
DMR Filter: None
CC Scan: Off
TS Filter: On
Talkaround: N/A
Dist sort: Off

Firmware:
20240908143017
[ 9947546 D ]
Plus 10W CPU: TYT

KA1CM

Posts:

Joined: Tue Nov 28, 2023 4:14 pm

Is it possible to post a screen shot of your WPSD config page. and your OpedGD77 codeplug here?

I'm not quite sure I understand the problem. Sounds like more than one problem entwine together.

VK3KYY

Posts:

Joined: Sat Nov 16, 2019 3:25 am

Location: Melbourne, Australia

If rebooting the hotspot fixes it, then whatever is causing problem is not in the radio

You could try using using PiStar rather than WPSD

In your when using a Duplex hotspot as simplex... In PiStar, AFIK, you need to change 2 settings

1. Select the radio button at the top of the screen to select Simplex
2. Select the modem type as Simplex

This will then only use one of the transceivers on the duplex modem

I run duplex hotspots in simplex mode, but they all use Rpi3B+ boards, because I find the PiZero quite slow, albeit I had PiZero V1 not the V2 which I presume is faster

I'd also recommend not connecting to multiple networks at the same time. i.e you say you are connecting to BM and TGIF, which will mean that behind the scenes you are running DMR Gateway, which isn't the easiest thing to configure.

WPSD must be configuring DMR Gateway, but potentially there is some miss configuation going on

In my experience most people end up running multiple hotspots, one per network rather than attempting to route multiple networks through one simplex hotspot.

That being said, I guess using a duplex hotspot with one network per TS, then you could run 2 networks without major clashes, but on a simplex hotspot, I think things would likely end up being problematic

KZ4HP

Posts:

Joined: Sat Sep 14, 2024 2:40 pm

Sorry I'm late getting back to this. I have not had a chance to post this picture of the WPSD config page.

I am not sure how to post my entire codeplug here, and not sure if that is something people do anyway because there are things in it I don't want just anybody seeing. I can tell you how certain things are set up though.

I think part of my issue is understanding exactly how DMR works - which I believe I still could be a little rusty on Coming from analog radios and channels etc, I want the DMR functions to behave similarly. I think I just need to understand that DMR is a different beast and then maybe I can understand how to make it work like I would like.

KZ4HP

Posts:

Joined: Sat Sep 14, 2024 2:40 pm

-Also wanted to add - not sure what i have done, it may have been a changed setting in the radio itself, but I am now constantly receiving traffic from TG 91 and I cannot get off of it. Even if I key into another TG I don't hear any traffic from that one. It is just permanently stuck on TG 91 receive.

SA0BUX

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Joined: Tue Jul 05, 2022 8:50 am

Location: JO99ah, Stockholm, Sweden

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I see that TG 91 is autostatic on your brandmeister account.

I don't like that feature but the last talkgroup that you key up will be "autostatic" on a simplex hotspot.
Try to select another dynamic talkgroup or make a call to TG 4000 unlink.

https://brandmeister.network/?page=device&id=321031801

https://help.brandmeister.us/talk-group... -vs-static

VK3KYY

Posts:

Joined: Sat Nov 16, 2019 3:25 am

Location: Melbourne, Australia

TG91 is notoriously problematic, because it's a nightmare to unlink from.

If you want to use TG91, I recommend you configure the BM Self-care to make it a static route, and then remove that route again after you have finished using it

KZ4HP

Posts:

Joined: Sat Sep 14, 2024 2:40 pm

How would this feature all the sudden become active? I don't understand why this all the sudden began to happen. For a couple of weeks, I would occasionally get a traffic from TG91, but it never stayed on.

I do know what the difference between static and dynamic and TG's. I would occasionally key into that group to attempt to activate it like a dynamic TG, but never had an issue like I do now. As soon as my MMDVM hotspot becomes active when it is turned on, it starts. I can change to another TG and key but it just keeps going on 91.

SA0BUX

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Joined: Tue Jul 05, 2022 8:50 am

Location: JO99ah, Stockholm, Sweden

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Auto-static for simplex hotspots has been in the brandmeister code for many years, at least since 2019.

But as this has nothing to do with OpenGD77 you need to take that issue in some brandmeister forum.

Short answer: Never key up TG91, a pain to get rid off

KC6WOG

Posts:

Joined: Tue Jun 20, 2023 1:16 am

This very issue had me frustrated for a long time, once I was on TG91 I couldn't get off it, no matter what I did! I was sure it was something I was doing wrong but eventually learned that it was just brandmeister being brandmeister. And from what I've seen, they're not exactly open to suggestions from users.

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