op25-dev

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Knock - Knock - Status on OP25 and Python3 etc...
by op25＠zellners.com 25 Aug '21

25 Aug '21

Knock knock knock... awfully quiet around here for 1 year + seems... Any updates on OP25 Boatbod and Python3 etc.... I know there was some work being done to get things back up to to speed ...... Any updates on that Python 3 for *buntu 20.04+ and I guess still Python2 on RasPI's/Raspbian at least???? My OP25's on PI's hum along doing what they need, but I like to put some of these on newer *buntu boxes ie: 20.04 ESR for some things... testing, etc... Looking forward to any updates??? Where things are in re this. Thanks for the great project!

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OP25 Update December 25, 2020
by ikjtel 25 Dec '20

25 Dec '20

OP25 Update December 25, 2020 ============================= 1. Experimental HTTP Live Streaming These hacks ("OP25-hls hacks") add a new option for audio reception and playback in OP25; namely, via an HTTP live stream to any remote client using a standard Web browser. The web server software used (nginx) is industrial-strength and immediately scalable to dozens or hundreds of simultaneous remote users with zero added effort. More than one upstream source (in parallel) can be served simultaneously. See the file apps/README-hls in the repo for more information. 2. NXDN48/NXDN96 RX and TX The multi_rx and multi_tx apps have been updated accordingly. The "filter_type" JSON keyword for NXDN channels should be set to "nxdn", and the "symbol_rate" keyword should be set to 2400 or 4800 for NXDN48 and NXDN96, respectively. A fair number of trunking and control packets are also currently decoded, although trunked call following for NXDN systems is not currently implemented. I would like to take this opportunity to thank Steve, KB9MWR, whose contribution greatly accelerated the NXDN effort. 3. Graphical (Plotting) Updates The constellation plot appearance has been enhanced and a new plot type "correlation" added. The correlation plot is actually five separate plots (nxdn 48 and 96, p25, dmr, and ysf) and can be used to show at a glance which of the five modulation types is in use. The correlation plot was present in OP25 long ago in scope.py and is now available in both rx.py and multi_rx.py. 4. UDP Linkage Between OP25 TX and RX Prior to these additions, a hardware RF transmitter/radio was always required to utilize the OP25 software TX. The OP25 TX application supports P25, DMR, YSF, NXDN, and DSTAR, and supports both halfrate and fullrate xMBE encoding, in real time, via its built-in software voice encoders. An arbitrary number of channels and modes may be transmitted simultaneously, within the usual spectrum spacing rules. The UDP additions allow the TX and RX to be linked. The example configuration contains two P25 channels, one trunk control channel and one voice channel. This permits rapid testing with no need to wait for a chance to receive a transmission. There is a python utility used to generate the fake P25 control channel data to be broadcast. See the file apps/README-example-udp in the repo for more information. 5. Ubuntu 20.04, Python 3 and GNU Radio 3.8 These are all supported in OP25 but until such time as these versions become more mainstream the changes are applied via a patch located in the TLD of the repo. 6. Experimental Online Web Configuration Interface This is a balky and complex addition and is very experimental. To invoke, run http.py instead of rx.py or multi_rx.py. These latter two are invoked automatically in the backend by http.py. Starting from a "blank" configuration, the details are filled in to a web form and then saved (to a server-side json config). In theory with these additions there is no further need for TSV files, although legacy TSVs can be loaded and then saved as json configs.

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HackRF options ? More than this needed like the Airspys???
by op25＠zellners.com 09 Sep '20

09 Sep '20

Ok.. .with the Airspys hidden magic spell documented... Do the HackRF's need something more like that??? I've got: --args 'hackrf' -g 65 -f 412.34e6 -N 'RF:14,IF:32,BB:26' As the various gains etc.....Any thing more to make it work "correctly?" :) ;) :) ;) That would certainly help with some other tests I'd like to do with OP25 v. some other stuff... Thanks advance....

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rx.py Airspy MASTER GAIN Setting option?????
by op25＠zellners.com 08 Sep '20

08 Sep '20

Trying to test out an AIRSPY R2 and the signal level v. an RTL is not even close. I've got -N options for LNA, MIX, IF, but what is the option for the MASTER GAIN? I've tried MAS, MASTER in the -N option, no change in the signal. I've tried -g as well no joy. Example: ./rx.py --args 'airspy' -N 'MASTER:50,IF:10,MIX:5,LNA:50' -S 2500000 -f 769.55625e6 -v 7 -T P25PC.tsv -q 2 -V -2 -U -x 2 2>> airspy.log ./rx.py --args 'airspy' -N 'IF:10,MIX:5,LNA:15' -S 2500000 -f 774.55625e6 -v 7 -T P25PC.tsv -q 2 -V -2 -U -x 2 2>> airspy.log What is the CORRECT method to set the MASTER GAIN of the Airspys, using something else its set to 14 for a good signal. Thanks.

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OP25 beginner
by Patrick Schlott 25 Aug '20

25 Aug '20

Hello, I'd like to get started with a build of OP25 on a Raspberry Pi 3B, with the intention of using it to transmit and receive P25 on a mobile radio. I have some experience building projects from the source, but the current install instructions do not work: https://osmocom.org/projects/op25/wiki/InstallInstructionsPage I'm not sure if the git link is wrong and I don't want to use svn as that's an older version of the software. Apologies if this is a beginner question, but this project interests me very much, and I'd like to help in any way I can, if only minimally. Respectfully, -Patrick Sent with [ProtonMail](https://protonmail.com) Secure Email.

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Hey everybody!
by indie 09 May '20

09 May '20

Hello everyone! I used to use OP25 circa 2013. Are you all still active on here?Sent via the Samsung Galaxy S8 Active, an AT&T 5G Evolution capable smartphone

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P25 P2 corrupted audio?
by Brian Rak 16 Apr '20

16 Apr '20

I've been trying to use OP25 to listen to a Project 25 Phase 2 system, and so far all I've managed to get is weird corrupted audio out of it. It almost sounds like the audio isn't being decoded at all, and it's just playing me the raw bit stream. I'm using: # ./rx.py --nocrypt -f 770081250 -N 'LNA:47' -2 -T trunk.tsv -l http: 192.168.5.134:4445 -v 8 --args 'rtl' -S 274000 -w -W 192.168.5.224 -q 2 -D fsk4 (have tried with and without the fsk4). I do see debug output that seems to indicate it's following the channel properly: https://gist.githubusercontent.com/devicenull/1086fe103f751be9103a86496b467… I'm listening in on a remote device with vlc: vlc.exe --clock-jitter=500 --network-caching=0 --demux=rawaud --rawaud-channels 1 --rawaud-samplerate 8000 udp://@:23456 The machine I'm running OP25 on doesn't really have a sound setup (it's a server, no GUI or speakers), so I can't really confirm if the issue is with the sound or VLC. Any suggestions?

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slow choppy audio
by Josh Tuel 22 Mar '20

22 Mar '20

I'm sorry if this has been asked before but I didn't see it in the archives. Any idea what could cause this slow choppy audio? https://photos.app.goo.gl/BinMZsag9G8nHAmaA I've played with the sampling and the my Mixer: balance (on Gnupot) is under 100. Thanks - Josh / N0EG

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H-DQPSK support?
by James Qiu 01 Mar '20

01 Mar '20

Hi, I'm new to OP25. I'm wondering if and when OP25 will support H-DQPSK demodulation. It's specified in Phase II of P25. I tried -2 option, but it didn't work. I used Anritsu LMR test box as the source. Thanks James

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OP25, python, and the upcoming *buntu 20.04 releases - heads up and FYI....
by op25＠zellners.com 01 Mar '20

01 Mar '20

As part of my moves to resolve the cmake issue and testing 20.04 for new boxes for OP25 and other stuff.. ... Probably a bad idea to try to tackle both at once, but hey may as well go big! Well... there are some issues... *buntu and/or python are killing Python 2.7. While its in the repos now.. the info I am being advised it likely won't be in the release ... Neither of the python packages seem to be setting up the proper ENV vars, symlinks etc... but thats another issue... BUT GNURadio in the repo is setup for Python 3.7..so when its installed all the GNUR radio stuff is in the python3.7/ path, not 2.7/ For OP25-boatbod is this Python 3.7 compatible?????? If not, I am guessing theres going to be a problem as it likely won't run on 20.04 releases if the 2.7 packages are really removed.. and ONE is missing already (but its still early), python-waitress (the actual program DEB Is missing, but the doc DEB is there?? (Again we are still alpha early)), I can fix it and bring in the Eoan/19.10 one with a little hackery... I can get things to compile but I don't think its complete in the least.. and then attempting to run rx.py get the unable to import gnuradio.. as its not in 2.7 and some ENV var issues too... I'll look at the EVN vars to make it point to 2.7 properly like <20.04 but I am not sure thats going to fly as its all in 3.7 paths... see: :/usr/bin$ python3 Python 3.8.2rc1 (default, Feb 12 2020, 00:06:56) [GCC 9.2.1 20200203] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import gnuradio >>> quit(); versus: :/usr/bin$ python Python 2.7.17 (default, Jan 21 2020, 23:28:51) [GCC 9.2.1 20200117] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import gnuradio Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: No module named gnuradio >>> So this is a heads up that theres likely to be a lot more noise about op25-boatbod not installing/compiling etc...or at least possibly have to go to 19.10 via LXC container.. I'll keep you advised if I can make any progress... the cmake issue is resolved but it means going back to 3.10.. I couldn't get 3.12.x to work at all. cmake was pulled from source and compiled.

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