Duplex Hat & DMR Gateway Setup Guide

Help with DMR issues
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VE6TTA
Posts: 3
Joined: Wed Apr 01, 2020 6:59 pm

Duplex Hat & DMR Gateway Setup Guide

Post by VE6TTA » Fri Apr 24, 2020 7:06 pm

Hi Folks! New poster here, and relatively new Hotspot user. I currently have a Pi 3 running a simplex hat. Just have it on DMR+ (Pheonix) and it is working quite well (apart from when some users don't leave a gap so I can't switch TG - grrr!).

I have now ordered a Duplex hat and another Pi 3 should be arriving over the weekend :-) In preparation, I am wondering if there is a comprehensive setup guide for Duplex hats?

I have multiple radios, so can utilise both timeslots, however my main reason for ordering a duplex hat was to be able to switch TGs during a busy QSO if i so choose.

In terms of radio programming, I prefer setting up individual channels rather than switching contacts on the fly.
Currently on DMR+ I have it set up this way, and I really like the fact they are now mapping TGs directly to reflectors on Pheonix-f :)

I don't mind introducing extra digits in the programming of the radio. So I would be happy with :
TG 100235 mapping to TG235 on DMR+
TG 200235 mapping to TG235 on BM
TG 300235 mapping to TG235 on TGIF
and whatever would be needed for XLX (I haven't directly used XLX reflectors yet)

Is there a guide that covers such a setup?
How would you manage the timeslots? e.g. can I use this TG mapping on both timeslots? I have noticed some people pipe TGIF onto 1 particular timeslot. I was hoping not to limit it by using the talkgroup rewriting.

All advice welcome as I anticipate and plan for the new gear!
Many thanks,
Rob

W1JAR
Posts: 2
Joined: Tue Apr 21, 2020 11:55 am

Re: Duplex Hat & DMR Gateway Setup Guide

Post by W1JAR » Sun May 10, 2020 10:34 pm

Have you ever figured it out? I found that DMRGateway configuration examples for duplex hats are few and far between...

W1JAR
Posts: 2
Joined: Tue Apr 21, 2020 11:55 am

Re: Duplex Hat & DMR Gateway Setup Guide

Post by W1JAR » Sun May 10, 2020 11:52 pm

Here's my question though. When a call comes on a TG number that exists on both networks, how does your radio know where to reply?

3125 - Massachusetts exists and all three networks for example. Do rewrite rules work both ways? Can it rewrite them back to their 300XXXX numbers?

W4JEW
Posts: 58
Joined: Sun Aug 12, 2018 12:53 am
Location: Atlanta, GA, United States
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Re: Duplex Hat & DMR Gateway Setup Guide

Post by W4JEW » Fri May 15, 2020 11:19 pm

Funny you ask - I was curious about how rewrite rules work and someone pointed me to this the other day:

https://github.com/g4klx/DMRGateway/wiki/Rewrite-Rules

DMR Gateway is a classic example of something that requires "tribal knowledge". There seem to be a few people around that know of its capabilities, but none of them are willing to document 100% of how it works.

Even that Wiki on GitHub consists of 3 pages:

Welcome
Example Configurations
Rewrite Rules

Example Configurations has two links - both of which result in 404 errors when you click on them.

There's a sample DMRGateway.ini file on GitHub that has some comments included, but that's not documentation. That's breadcrumbs as far as I'm concerned.

https://github.com/g4klx/DMRGateway/blo ... ateway.ini

If anyone happens to come across the holy grail of DMR Gateway documentation, please point in the right direction!
Check out GeorgiaDMR.net - https://www.georgiadmr.net
And on Groups.io - https://groups.io/g/GeorgiaDMR

Jeff Hochberg
W4JEW
Atlanta, GA

W4JEW
Posts: 58
Joined: Sun Aug 12, 2018 12:53 am
Location: Atlanta, GA, United States
Contact:

Re: Duplex Hat & DMR Gateway Setup Guide

Post by W4JEW » Fri May 15, 2020 11:25 pm

Here's someone that seems to know what they're talking about....

viewtopic.php?f=5&t=2252&p=11542
Check out GeorgiaDMR.net - https://www.georgiadmr.net
And on Groups.io - https://groups.io/g/GeorgiaDMR

Jeff Hochberg
W4JEW
Atlanta, GA

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