DMR APRS Beaconing

R9OBQ
Posts: 13
Joined: Thu Apr 02, 2020 12:31 pm

DMR APRS Beaconing

Post by R9OBQ » Mon Feb 19, 2024 2:19 pm

Good afternoon.
I propose an idea how to implement dmr aprs beacon in In-Call GPS mode. It will not be correct, not right, but quite working. Just checked the idea, personal call to ***999 (in Russia 250999) is perfectly decoded by BM servers and sent to aprs network. It remains to force Opengd with the frequency of existing settings of "analog aprs" to make an automatic personal call to ***999 with silence (perhaps through the known registers HRC6000 can turn off the microphone or make it as silent as possible) for the duration necessary for the transmission of In-Call GPS data.

VK3KYY
Posts: 8682
Joined: Sat Nov 16, 2019 3:25 am
Location: Melbourne, Australia

Re: DMR APRS

Post by VK3KYY » Tue May 27, 2025 9:08 pm

R9OBQ wrote: ↑
Mon Feb 19, 2024 2:19 pm
Good afternoon.
I propose an idea how to implement dmr aprs beacon in In-Call GPS mode. It will not be correct, not right, but quite working. Just checked the idea, personal call to ***999 (in Russia 250999) is perfectly decoded by BM servers and sent to aprs network. It remains to force Opengd with the frequency of existing settings of "analog aprs" to make an automatic personal call to ***999 with silence (perhaps through the known registers HRC6000 can turn off the microphone or make it as silent as possible) for the duration necessary for the transmission of In-Call GPS data.
Using TA for APRS beaconing is very inefficient because the transmission would need to be several seconds long to guarantee that the frame containing the GPS information has been sent and also received, additionally there is the repeater triggering process which also takes time.

I think this would be highly disruptive to other users of the repeater.

VE4HTO
Posts: 31
Joined: Sat May 27, 2023 11:09 pm

Re: DMR APRS Beaconing

Post by VE4HTO » Wed May 28, 2025 7:54 pm

R9OBQ wrote: ↑
Mon Feb 19, 2024 2:19 pm
Good afternoon.
I propose an idea how to implement dmr aprs beacon in In-Call GPS mode. It will not be correct, not right, but quite working. Just checked the idea, personal call to ***999 (in Russia 250999) is perfectly decoded by BM servers and sent to aprs network. It remains to force Opengd with the frequency of existing settings of "analog aprs" to make an automatic personal call to ***999 with silence (perhaps through the known registers HRC6000 can turn off the microphone or make it as silent as possible) for the duration necessary for the transmission of In-Call GPS data.
Brandmeister decodes the position data within TA on every TG (and forward them to APRS-IS network), not only on ***999 or ***997 etc. To have this working, you have to configure your account data in BM selfcare accordingly. Note that this is only with Brandmeister - DMRplus etc. is not working this way...