MMDVM Hat won't RX in Duplex Mode

MMDVM_HS Hat hardware
cx8bit
Posts: 2
Joined: Tue Sep 25, 2018 8:03 pm

MMDVM Hat won't RX in Duplex Mode

Post by cx8bit »

Hello,
I own a MMDVM Pog and a STM32-DVM V3. I connect those to 2 Motorola GM300 radios (duplexor + good antenna).
I managed to configure them in Simplex mode and they work super fine ;) .

But when I set the Duplex mode (Repeater mode, no changes in hardware) and do the repeater configuration, both hats won't RX :cry: . The COS light just won't turn on, and there is no DMR (in this case) activity in the dashboard. When I switch it back to Simplex, it works fine again (the COS light turns on again).

It works fine for TX. Any idea? I'm running Pi-Star:3.4.16 and the FW version is MMDVM:201808... something (pretty new).

I don't get any logs.

Any idea?
73!
cx8bit
Posts: 2
Joined: Tue Sep 25, 2018 8:03 pm

Re: MMDVM Hat won't RX in Duplex Mode

Post by cx8bit »

My bad! My handy had the wrong settings. The COS light won't turn on until the handshake is complete! :D
W0JRG
Posts: 6
Joined: Wed Nov 28, 2018 3:54 am

Re: MMDVM Hat won't RX in Duplex Mode

Post by W0JRG »

What setting did you have to change to get the RX to work in duplex mode? I am having the same issue here.
User avatar
m0guy
Posts: 26
Joined: Mon May 04, 2020 12:57 pm
Contact:

Re: MMDVM Hat won't RX in Duplex Mode

Post by m0guy »

Yes please share the details.

I have MMDVM repeater POG board with GM350. I get perfect TX to the radio, but no matter what I do the MMDVM board seems to be deaf to any transmissions. I know the RX GM350 is hearing traffic, and sending it to the board. Should I be wiring a COS line from the radio to the MMDVM board or just AudioRX and ground?
-----------------------------
DMR Help: https://help.m0guy.com
Personal web: https://m0guy.com
g7kbr
Posts: 73
Joined: Thu Nov 01, 2018 1:03 pm

Re: MMDVM Hat won't RX in Duplex Mode

Post by g7kbr »

m7guy wrote:Yes please share the details.

I have MMDVM repeater POG board with GM350. I get perfect TX to the radio, but no matter what I do the MMDVM board seems to be deaf to any transmissions. I know the RX GM350 is hearing traffic, and sending it to the board. Should I be wiring a COS line from the radio to the MMDVM board or just AudioRX and ground?
Hi

Did you ever fix your POG board problem?

Regards

Paul


Sent from my iPhone using Tapatalk
User avatar
m0guy
Posts: 26
Joined: Mon May 04, 2020 12:57 pm
Contact:

Re: MMDVM Hat won't RX in Duplex Mode

Post by m0guy »

Yes I have it all working just great now..

I had to make an internal modification to the GM350 radio from the IF chip and pin 11 on the edge connector.

I've written a detailed article for RadCom which should be published shortly. They had to trim it down a little but not quite down to the "mostly harmless" level. :lol:

Cheers,
--Guy
-----------------------------
DMR Help: https://help.m0guy.com
Personal web: https://m0guy.com
g7kbr
Posts: 73
Joined: Thu Nov 01, 2018 1:03 pm

Re: MMDVM Hat won't RX in Duplex Mode

Post by g7kbr »

What version of firmware are you using for the POG board?


Sent from my iPhone using Tapatalk
User avatar
m0guy
Posts: 26
Joined: Mon May 04, 2020 12:57 pm
Contact:

Re: MMDVM Hat won't RX in Duplex Mode

Post by m0guy »

Now that's an interesting one..

the pi-star is reporting MMDVM: 20190130

I have tried to update it but it always seems to fail. If you know how to get the latest on it I would be very interested.

Cheers,
--Guy
-----------------------------
DMR Help: https://help.m0guy.com
Personal web: https://m0guy.com
User avatar
m0guy
Posts: 26
Joined: Mon May 04, 2020 12:57 pm
Contact:

Re: MMDVM Hat won't RX in Duplex Mode

Post by m0guy »

The repeater is here if you want to take a look at the dashboard: https://gb7gp.m0guy.com
-----------------------------
DMR Help: https://help.m0guy.com
Personal web: https://m0guy.com
User avatar
m0guy
Posts: 26
Joined: Mon May 04, 2020 12:57 pm
Contact:

Re: MMDVM Hat won't RX in Duplex Mode

Post by m0guy »

Just tried to update the firmware now.. and I'm getting

Press any key to write the rpt_hat-19.2mhz firmware to this modem or Ctrl-C to quit...
Preparing tools ...
Cloning into 'stm32flash-code'...
fatal: unable to connect to git.code.sf.net:
git.code.sf.net[0: 216.105.38.16]: errno=Connection timed out

/usr/local/sbin/pistar-mmdvmrpthatflash: line 77: cd: stm32flash-code: No such file or directory
make: *** No targets specified and no makefile found. Stop.


Flashing MMDVM_RPT_Hat
/usr/local/sbin/pistar-mmdvmrpthatflash: line 172: stm32flash-code/stm32flash: No such file or directory
/usr/local/sbin/pistar-mmdvmrpthatflash: line 175: stm32flash-code/stm32flash: No such file or directory
-----------------------------
DMR Help: https://help.m0guy.com
Personal web: https://m0guy.com
Locked