op25 on Raspberry Pi Decoding DMR

[hydes2004]

I have a local agency on 155.130 that has switched to DMR. They are not encrypted. I can not find any info to setup a single site DMR setup in op25.

Freq 155.130
Color 12
Slot 1


Does anyone have an example file I could try out?

 

[Dark_Hunter]

It's tucked away in few subfolders on the GitHub. Link below. Take a look at dmr_rtl_example.json to see what's going on.

https://github.com/boatbod/op25/tree/master/op25/gr-op25_repeater/apps

 

[hydes2004]

Thansk i`ll take a look

 

[boatbod]

Try the attached config (after renaming cfg_rtl.json.txt to cfg_rtl.json)
To actually play audio you will need two terminal windows:
#1
./multi_rx.py -c cfg_rtl.json -v 10 2> stderr.2

#2
./audio.py -2

Sometimes it can be helpful to have a third terminal window running to show realtime log contents
#3
tail -f stderr.2

 

[hydes2004]

Thanks so much. I’ll give it a try when I get home!

 

[hydes2004]

still having issues. im green to this op25 stuff, i installed it using these guides OP25 Raspberry Pi Streaming Part 2 | John’s Tech Blog

 

[boatbod]

still having issues. im green to this op25 stuff, i installed it using these guides OP25 Raspberry Pi Streaming Part 2 | John’s Tech Blog

The basic install will be similar, but startup and operation are different between P25 and DMR. The three steps above should be all you need.
What if anything do you have in your stderr.2 log?

 

[hydes2004]

I have not touched that log. I could not find any instructions on DMR

 

[hydes2004]

trying a clean install now

 

[hydes2004]

gnuplot: unable to open display ''
gnuplot: X11 aborted.

gnuplot> et terminal x11 noraise
^
line 112347: invalid command


gnuplot: unable to open display ''
gnuplot: X11 aborted.

gnuplot> et terminal x11 noraise
^
line 112860: invalid command


gnuplot: unable to open display ''
gnuplot: X11 aborted.

 

[boatbod]

sudo apt-get install gnuplot-x11

 

[hydes2004]

gnuplot is installed, after a fresh install and installing using your boatbot link you sent me in the other thread i open 3 terminal windows like you shown before and i sitll get that error

 

[hydes2004]

 

[hydes2004]

I was able to paste it. the freq gui shows it on cetner of my freq
1579614353.764742 [-1] Slot(0), CC(c), IDLE
1579614353.768907 [-1] Slot(1), CC(c), Data Type=9, gly_errs=0
1579614353.768994 [-1] Slot(1), CC(c), IDLE
1579614353.772459 [-1] Slot(0), CC(c), Data Type=9, gly_errs=0
1579614353.772734 [-1] Slot(0), CC(c), IDLE
1579614353.783577 [-1] SLCO=0x0, NULL MSG
1579614353.783815 [-1] Slot(1), CC(c), Data Type=9, gly_errs=0
1579614353.783916 [-1] Slot(1), CC(c), IDLE
1579614353.859108 [-1] Slot(0), CC(c), Data Type=9, gly_errs=0
1579614353.859353 [-1] Slot(0), CC(c), IDLE
1579614353.889251 [-1] Slot(1), CC(c), Data Type=9, gly_errs=0
1579614353.889444 [-1] Slot(1), CC(c), IDLE
1579614353.893783 [-1] Slot(0), CC(c), Data Type=9, gly_errs=0
1579614353.893970 [-1] Slot(0), CC(c), IDLE
1579614353.897240 [-1] SLCO=0x0, NULL MSG
1579614353.897436 [-1] Slot(1), CC(c), Data Type=9, gly_errs=0
1579614353.897506 [-1] Slot(1), CC(c), IDLE
1579614353.901762 [-1] Slot(0), CC(c), Data Type=9, gly_errs=0
1579614353.901948 [-1] Slot(0), CC(c), IDLE
1579614353.998063 [-1] Slot(1), CC(c), Data Type=9, gly_errs=0
1579614353.998286 [-1] Slot(1), CC(c), IDLE
1579614354.004741 [-1] Slot(0), CC(c), Data Type=9, gly_errs=0
1579614354.005039 [-1] Slot(0), CC(c), IDLE
1579614354.011386 [-1] SLCO=0x0, NULL MSG
1579614354.011732 [-1] Slot(1), CC(c), Data Type=9, gly_errs=0
1579614354.011900 [-1] Slot(1), CC(c), IDLE
1579614354.018901 [-1] Slot(0), CC(c), Data Type=9, gly_errs=0
1579614354.019689 [-1] Slot(0), CC(c), IDLE
1579614354.023910 [-1] Slot(1), CC(c), Data Type=9, gly_errs=0
1579614354.024529 [-1] Slot(1), CC(c), IDLE
1579614354.162388 [-1] Slot(0), CC(c), Data Type=9, gly_errs=0
1579614354.162484 [-1] Slot(0), CC(c), IDLE
1579614354.165730 [-1] SLCO=0x0, NULL MSG
1579614354.165831 [-1] Slot(1), CC(c), Data Type=9, gly_errs=0
1579614354.165851 [-1] Slot(1), CC(c), IDLE
1579614354.454674 [-1] Slot(0), CC(c), PI(1), EMB lcss(2), qr_errs=2
1579614354.541734 [-1] DMR: timeout, symbol 119286

 

[boatbod]

Looks like the RTL is properly tuned and receiving data as evidenced by the IDLE messages. If you reduce the log level to "-v 9" you can watch for AMBE codewords which would occur when voice is received and decoded.

Note: "DMR timeout" message occurs when the base station stops transmitting or framing is temporarily lost due to too high a bit error rate. In other words it may be a perfectly normal situation if there is no traffic and the BS has shut off due to inactivity.

 

[hydes2004]

You are a huge help! Thanks so much!

 

[hydes2004]

so, it decodes, but not audio trough headphone jack. already set alsamixer to use headphone jack

 

[kb9mwr]

Have you verified that you can play a .wav file with aplay from the command line and hear it out the headphone jack? I always start by throwing a .wav file on the pi and make sure works.

 

[hydes2004]

yes, i played a sound through and heard it over my broadcastify feed

 

[boatbod]

so, it decodes, but not audio trough headphone jack. already set alsamixer to use headphone jack

Are you running the ./audio.py process in a separate terminal?