APRS via Brandmeister with openSPOT4

DG1OBD · 2025-05-30T21:00:31+00:00

Hello, I'm using an openSPOT4 with v84 and a Motorola R7 or Hytera HP785. APRS works perfectly via Brandmeister Repeater or MMDVM HotSpot (WPSD). It doesn't work with the openSPOT4. How can I configure it? vy 73, Axel

DG1OBD

HA2NON
By the way, the screenshots are old. Hytera and Motorola have now released newer CPS.

micksmith

Get over yourself,,, "With you, one of you doesn't know what the other is doing...
I know how to configure a radio. Read everything I've posted.." dont seem like it to me,,, or understand how the OS4 works, send it back like you wanted to do and get some sleep.

DG1OBD

I didn't mean to sound annoyed. I'm sorry about that.

But at the same time, I want to understand how openSpot works.

micksmith

Yeah some of these gadgets these days have a bit of a learning curve, there have been times when i have got really frustrated with something and spent days getting pissed off and in the end it was a simple setting i missed or got wrong, mostly networking and port forwarding, i hate that stuff.

DG1OBD

In my problem, the openSpot sometimes sends the location and sometimes not. SMS the same.

@HA2NON support openSPOT Motorola CBSK?

HA2NON

Yes.

Please run DMR AutoCal, or manually adjust the RX offset on the Modem page in +-100Hz steps from -500Hz to +500Hz for the lowest BER. You can verify settings using the openSPOT's built-in local echo service on DMR ID 9999.

If AutoCal does not work for you then the RX offset between the transceiver and the openSPOT is greater than 500Hz. What you can do is to switch frequencies on the openSPOT, but keep the transceiver's frequency. For example, if the transceiver is on 433.900MHz, then test by setting the openSPOT to the following frequencies:

433900500 Hz
433900600 Hz
433900700 Hz
...
433899500 Hz
433899400 Hz
433899300 Hz
...

You can use the built-in local echo service to test your own voice on DMR ID 9999.

DG1OBD

HA2NON

ok, thx

DG1OBD

@HA2NON
I can't get the BER problems under control. Currently, I'm at +330 shift. Two passes work, then BER drops out again. This keeps happening. Is OpenSpot broken?

DG1OBD

I got a new openSPOT. The BER is now stable. But I can't send SMS messages or send the location via Brandmeister APRS with a Hytera or Motorola.
What is the correct configuration, or what is the problem?

According to the Brandmeister 262 team, this is a reported known issue. When will you respond?

The openSPOT is unusable for me as it is.

_17:59:38 dmrct: [0] got csbk preamble, blocks to follow: 6, data follows: 1
17:59:38 dmrct: [0] prv data call started, dst: 262999 src: 2620649 id: 2c15f4a1b8f1fddc
17:59:38 dmrct: [0] call ended, dur 0.0s ber 0.0% loss 0.0% rssi -43
17:59:38 homebrew-dmr: [0] call stopped
17:59:38 dmrct: [0] prv data call started, dst: 262999 src: 2620649 id: 77bd2d8d07de312c
17:59:38 dmr-sms: sms call is not ongoing, ignoring rate 3/4 data
17:59:38 dmr-sms: sms call is not ongoing, ignoring rate 3/4 data
17:59:38 dmr-sms: sms call is not ongoing, ignoring rate 3/4 data
17:59:39 dmr-sms: sms call is not ongoing, ignoring rate 3/4 data
17:59:39 dmr-sms: sms call is not ongoing, ignoring rate 3/4 data
17:59:39 dmrct: [0] call ended, dur 0.4s ber 0.2% loss 0.0% rssi -48
17:59:39 homebrew-dmr: [0] call stopped
17:59:39 dmr-sms: call from network, but we don't intercept network msgs
17:59:39 dmrct: [0] prv data call started, dst: 2620649 src: 262999 id: 6dadc03aceb2aff6
17:59:39 homebrew: instantly sending data to modem
17:59:39 modem-djq: emptied, closing
17:59:39 modem-tx: start
17:59:39 dmrct: [0] call ended, dur 0.0s ber 0.0% loss 0.0% rssi 0
17:59:39 modem-tx: end
17:59:41 homebrew: ping sent
17:59:41 homebrew: pong received__

DG1OBD

21:12:09 modem-tx: end
21:12:09 dmr-sms: sms call is not ongoing, ignoring rate 3/4 data
21:12:09 dmr-sms: sms call is not ongoing, ignoring rate 3/4 data
21:12:10 dmr-sms: sms call is not ongoing, ignoring rate 3/4 data
21:12:10 dmr-sms: sms call is not ongoing, ignoring rate 3/4 data
21:12:10 dmr-sms: sms call is not ongoing, ignoring rate 3/4 data
21:12:10 dmr-sms: sms call is not ongoing, ignoring rate 3/4 data
21:12:10 net-chk: ok (27 ms)
21:12:10 modem-tx: start
21:12:10 modem-djq: emptied, closing
21:12:11 modem-tx: end

HA2NON

We don't know about any issues we should respond to as DMR SMS sending works correctly. Your log does not show any issues. It shows that a message has been received from your transceiver and forwarded to 262999, and then a reply is received and forwarded back to your transceiver. The "ignoring" means that the openSPOT passes through data and does not process it.