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Hytera RD982 Repeater - APRS Support

asked 2018-01-07 17:43:57 +0200

W7CIA gravatar image

Our small group has three Hytera RD-982 repeaters on BM. We've been attempting to get GPS positioning data to forward to APRS for several days without success. For the purpose of discussion, this query is focused on using a Hytera PD682 hand-held transceiver.

What has been done is:

  • Configure the Hytera PD682 per the instructions found in a document titled Hytera GPS / APRS settings on BM via a DV device, which can be found at . The radio is programmed using a RRS & GPS Radio ID of 310999 and the Data Bearer Service to Compressed IP (although both Compressed IP and Hytera Defined Data have been tried). The radio has a button programmed to send the position. The channels are programmed to have both the GPS Revert Channel and RRS Revert Channel set to Selected.
  • Configure BM Self Care to set radio brand to Hytera / Kenwood, with APRS callsign set to W7CIA-9, set APRS Icon and turn on In CALL GPS. Note that these same settings are evident on the <body>link awaiting moderation</body> web-site self-care page.
  • The Hytera RD982 repeater has also had the Data Bearer Service set to a value that matches what is configured in the PD682 code plug (i.e. currently set to Compressed IP).

The radio is acquiring GPS satellites and displays a latitude / longitude position. When manually sending the position, a message is initially displayed on the PD682 that indicates GPS Sending. This is followed by an error dialog message is displayed on the PD682 that indicates Send Failed.

The USA BM Wiki has a note on the user guide that indicates that instructions on setting up a repeater to support APRS will be added in the future. Thus far, searches have not produced any results that produce any instruction on configuring the RD982 repeater to forward GPS data to APRS.

Is there any definitive documentation available on properly configuring both the Hytera RD982 repeater and the Hytera transceiver to enable GPS position forwarding to APRS?

Any assistance would be greatly appreciated.

best regards, Ray Montagne - 3116004 W7CIA

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answered 2018-01-08 02:30:31 +0200

Bruce AA7BG gravatar image

updated 2018-01-08 02:31:09 +0200

Hi Ray,

I ran into the same issue with my Hytera system here in Oregon (RD982 repeater and PD982 handhelds on Brandmeister). My research lead to a timing issue for the network acknowledgement getting back to the subscriber radio. The position reports were actually going through and the lack of a timely ACK was producing the Send Failed message. This is a known problem with a recommended fix in the subscriber radio.

Have you checked APRS.FI or your favorite aprs client to see if your reports are going through? My reports were making it fine while I still got the Send Failed. This is the definitive diagnosis for the ACK timing problem.

If this is what's going on for you, simply extend the Wait Ack Time in the subscriber CPS. Conventional => Digital Common => Basic => raise the Wait Ack Time. Default 0 ms. I use 4800 ms and works good.

My experience has shown that this is not a repeater problem. The common settings in the RD982 work best for Brandmeister use with only minor exception.

Hope this helps you. As always your mileage may vary.

Bruce Grabhorn AA7BG Good on QRZ

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Thanks for your response Bruce. Yes, I've checked and no reports were posted. Ray

W7CIA gravatar imageW7CIA ( 2018-01-08 03:24:06 +0200 )edit

Bruce, I had not seen a report previously, even when visiting several times during the 30-minutes after making a test. However, I tried it again tonight and the position shows up. I haven't a clue why the behavior changed (using the same code plug that failed.). Thanks much! 73, Ray

W7CIA gravatar imageW7CIA ( 2018-01-08 05:42:45 +0200 )edit

Ray, yes the aprs is a bit slow to post at first... It does improve with use. One other thing that helps data across BM (and doesn't often get mentioned) is to set the subscriber radio "Alias Data Format" to ISO 8 bit. It is in Conventional => Digital Common => Basic => Miscellaneous. Bruce AA7BG

Bruce AA7BG gravatar imageBruce AA7BG ( 2018-01-08 20:46:31 +0200 )edit

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Asked: 2018-01-07 17:43:57 +0200

Seen: 112 times

Last updated: Jan 08