op25-dev

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312 discussions

Jumping in
by contrapezist 04 Feb '13

04 Feb '13

Hello all, They accepted my request for membership (what were they thinking). So Im just going to jump right in and see what if anything I can contribute and try to not ask too many silly questions. Altho P25 isnt my main area of interest it is something to work with as there is a P25 system locally with a combination of clear and ADP encrypted traffic on it. Being the nosey type I am like to see whats going on with the system. As for myself an electrical engineer currently working in broadcast television. Not much of a programmer have done a bit of c for microchip pic in recent years and linux is something I havnt played with in 15 or more years so a bit rusty. I do speak fluent cisco and have a way of scavenging nice hardware. The corprate IT dept is in our building and its a revolving door they give about 4 years at the outside before turning down a system. Currently sitting on an IBM x455 cluster that really needs something to do other than track satellites :) Trying to latch on to the blade centers but they still have signifigant value and are easy to ship. Thats me in a nut house I mean nut shell reading thru the threads and site trying to get something workable to start and take it from there. Austin

3 3

OP25 and WireShark Help
by rbrtklamp 31 Jan '13

31 Jan '13

Has anybody had any luck getting OP25 to work. I have been going crazy trying to get this program installed and running but it always gives me errors. I have tried ubuntu 9.10 but they no longer release or update any packages for that version anymore. So now I am on to Ubuntu 10.04 GNUradio installs fine but I get a ton of errors when trying to install OP25. My end game is to be able to use OP25 with wire shark to review the data packets. Right now I am at a loss, I am not very Linux literate and really have a almost no knowledge on how the operating system works. I should add I installed and use DSD just fine, thats why this op25 thing is driving me crazy I follow every part of the building instructions to the T and still get errors and missing pieces. I am at the point that I am willing to pay somebody for their time if someone would be kind enough to contact me directly I will give you my phone number and we can go from there. Just let me know what I owe you for your time and I will paypal it over to you. Bottom line is I NEED to get this program up and running with wire shark for a project me and some Friends are working on. Any help would be very much appreciated and I am more than happy to compensate any for their time if somebodies willing to walk me through the set-up and figure out why I cant get it running. PLEASE HELP! Any one interested can contact me here directly at the email address below. Thank you all for your time, Robert Klamp RobertKlamp at Comcast dot net

7 21

trouble running OP25
by md123＠nycap.rr.com 31 Jan '13

31 Jan '13

Hi guys. I was able to successfully compile and install (at least with no errors) OP25, gr-fsk4, wireshark, and GNUradio. Using Ubuntu 12.10 and all of the latest for the OP25, gr-fsk4, wireshark, and GNUradio. Now I am confused here because OP25, fsk4 decoder, and wireshark, are not found in my GNUradio. Anyone have any ideas of why GNUradio doesnt have available the blocks i installed? Any help is much appreciated, Thanks a bunch, Matt

3 4

P25 Transmission
by rosin.f＠att.net 18 Dec '12

18 Dec '12

Hello brains, Qt the boto; of this page: http://op25.osmocom.org/wiki/wiki/RepeaterPage I would like to understand the limitation of the USRP transmission: - Why is the channel spacing arbitrarily 25 kHz (just a SW limitation ?) - Are you transmitting the P25 air interface for voice ? Thank you,

6 7

P25 Transmission
by fredofaiduvelo 15 Dec '12

15 Dec '12

Hello, Is this implementation allow to transmit outbound P25 voice ? Thank you, Fred

2 1

build issue with missing library?
by Stephen 14 Dec '12

14 Dec '12

Hi, Where would I find the library for op25? It looks like everything builds but I can't find a .a file for op25. The only library I can find is libimbe_vocoder.a. Am I missing something? stephen

2 1

op25 New Install What version Of Ubuntu? What Version of GNURadio?
by Andrewiski 10 Dec '12

10 Dec '12

I am setting up an Ubuntu pc for the sole purpose of running op25. I am struggling getting op25 to work on Ubuntu 12.10 as GCC 4.11 does not seem to be available to install anymore because it has compatibility issues with the newer version. At least that is what I have found on the web. Anyways I have the need to view raw p25 packets to trouble shoot a bug with a specific radio's data packets. I have two ways to receive the audio stream either via discriminator tap or via usb rtl-sdr. In Ubuntu 12.10 I have done the following. Failed to build GNURadio 3.2.2 with compiler errors, not missing imports but things like invalid syntax etc so preaty sure it is because I can't use Gcc 4.11 in Ubuntu 12.10 Successfully installed GNURadio 3.6 via builtin" Ubuntu Software Center" installer Successfully make and install op25 at least didn't get any errors. Successfully make and install patched version of wireshark. Successfully make gr-fsk4 but had to add stderr definitions to a couple of the files to fix make errors also had to copy gruel_common.i from /usr/local/include/gruel/swig to /usr/local/include/gnuradio/swig to fix missing gruel_common.i error Succesfully make imbe_vocoder. I tried to run "./audio_p25_rx.py a" from the op25/python directory but kept getting an "importError: no module named op25" error. I tired setting PYTHONPATH environment variable to /usr/local/lib/python2.7/dist-packages where the op25.py file was located (http://www.youtube.com/watch?v=86KtgkaH5H0) but still same error so I copied all of the op25/python/ files to /usr/local/lib/python2.7/dist-packages/gnuradio folder I ran it there and still got op25 errors. I figured it was an issue with gnuradio version so I uninstalled gnuradio using Ubuntu Software center. I also did a "make uninstall" on the gr-fsk4 I installed earlier because it seems to have been replaced in op25 with gr-baz. gr-baz is included in this install script I did a build of gnuradio and a buch of other needed tools using a script located at (http://www.sbrac.org/files/build-gnuradio) I made a folder new folder src in my home directory I coped the build-gnuradio script to this folder. I then ran chmod 755 build-gnuradio to allow execution. I ran "./build-gnuradio v all" (took awhile and had some warnings but no errors) Now things started to work at least without the import errors so referenecs seem to be a lot better. I can run ./rtl_sdr and do a capture so thats a plus as I know my cheap sdr usb receiver is working. If I run ./audio_p25_rx.py I get the following errors Using Volk machine: sse4_1_64 Traceback (most recent call last): File "./audio_p25_rx.py", line 1044, in <module> app = stdgui2.stdapp(p25_rx_block, "APCO P25 Receiver", 3) File "/usr/local/lib/python2.7/dist-packages/gnuradio/wxgui/stdgui2.py", line 38, in __init__ wx.App.__init__ (self, redirect=False) File "/usr/lib/python2.7/dist-packages/wx-2.8-gtk2-unicode/wx/_core.py", line 7981, in __init__ self._BootstrapApp() File "/usr/lib/python2.7/dist-packages/wx-2.8-gtk2-unicode/wx/_core.py", line 7555, in _BootstrapApp return _core_.PyApp__BootstrapApp(*args, **kwargs) File "/usr/local/lib/python2.7/dist-packages/gnuradio/wxgui/stdgui2.py", line 42, in OnInit self._max_noutput_items) File "/usr/local/lib/python2.7/dist-packages/gnuradio/wxgui/stdgui2.py", line 64, in __init__ self.panel = stdpanel (self, self, top_block_maker, max_nouts) File "/usr/local/lib/python2.7/dist-packages/gnuradio/wxgui/stdgui2.py", line 86, in __init__ self.top_block = top_block_maker (frame, self, vbox, sys.argv) File "./audio_p25_rx.py", line 97, in __init__ self.__init_gui(frame, panel, vbox) File "./audio_p25_rx.py", line 276, in __init_gui self.spectrum_plotter = self.spectrum.win.plot AttributeError: 'fft_window' object has no attribute 'plot' If I open and execute (http://svn.spench.net/main/gr-baz/samples/OP25.grc) from http://wiki.spench.net/wiki/Gr-baz#grc I get the follow errors Using Volk machine: sse4_1_64 Traceback (most recent call last): File "/home/andrewadevries/op25/op25_grc.py", line 563, in <module> tb = op25_grc() File "/home/andrewadevries/op25/op25_grc.py", line 306, in __init__ self.rtl2832_source_0 = baz.rtl_source_c(defer_creation=True, output_size=gr.sizeof_gr_complex) AttributeError: 'module' object has no attribute 'rtl_source_c' Any one offer some suggestions?

2 1

Trouble running OP25
by rbrtklamp 04 Dec '12

04 Dec '12

Hi I am new to the group and GNUradio. I have installed gnuradio on ubuntu 12.04 from the directions at this link. http://blogs.bu.edu/mhirsch/2012/07/installing-gnu-radio-in-ubuntu-12-04-x6… I then went to the build instructions page and followed them to the T, all seemed to be going well but when I enter the command line to start it ~/src/op25/python$ ./audio_p25_rx.py -a I get this error message robert@robert-laptop:~/src/op25/python$ ./audio_p25_rx.py -a Traceback (most recent call last): File "./audio_p25_rx.py", line 34, in <module> from gnuradio import audio, eng_notation, fsk4, gr, gru, op25 ImportError: cannot import name fsk4 robert@robert-laptop:~/src/op25/python$ Can anybody please help me get the program running I am not great with software code and really need to get this up and running for a current project I am a part of. I am hoping this issue can be resolved with a couple of command lines. Thank You For Your Time and Help, Robert Klamp Jr.

3 4

Patches & instructions to get OP25 working with UHD/GRC/DES-OFB
by Balint 09 Nov '12

09 Nov '12

Hi folks, It has taken a little longer than I anticipated, but it's all here: http://wiki.spench.net/wiki/OP25 The page describes: . Getting the latest OP25 working with the latest GNU Radio (one easy patch) . Using the Legacy USRP shim so OP25 can access any USRP via UHD (one symlink) . How to do a side-by-side install of multiple OP25 versions <http://wiki.spench.net/wiki/Side-by-side_GNU_Radio_Modules> (one copy & script) . Adding DES-OFB decryption (a little more complex, but all the instructions are there) The side-by-side guide <http://wiki.spench.net/wiki/Side-by-side_GNU_Radio_Modules> not only applies to OP25, but any other GR module. Don't forget to install gr-baz <http://wiki.spench.net/wiki/gr-baz> to get the OP25 Decoder block <http://wiki.spench.net/wiki/gr-baz#op25> for GNU Radio Companion, a sample flowgraph that does the decoding from a variety of sources, the patches themselves and additional sample files. Please let me know if this is useful to people, what success you have, and if anyone is keen to move the DES-OFB code to the latest source (the patch is for version 219!). Kind regards, Balint

1 0

OP25 working with UHD and GRC [2 Attachments]
by Balint 27 Sep '12

27 Sep '12

Hi folks, I had the pleasure of sitting with some major OP25 contributors (Max and Mike) at the GNU Radio conference today, and also managed to get OP25 working with a USRP N210 using UHD. You can see in the attached image that I'm using the OP25 block from gr-baz in GRC (the flowgraph sends the decoded audio to the speakers via the Audio Sink). The voice frames' data is being printed in the console, and four-level dibits are shown on the scope. The other tabs contain FFTs for the entire baseband and the selected channel, and make use of the new click-handler feature that triggers a callback containing the frequency you clicked on. You can therefore tune (really change the offset in the Freq Xlating Filter) to a signal you see appear on the FFT just by clicking on it (the same way you can with the Python apps, e.g. usrp_p25_rx/audio_p25_rx, however this is all from GRC). The IT++ 4.2 BCH problem still exists, so I've used the alternate implementation that Max also uses in the 'repeater' code to handle identification of the frame header. The GRC flowgraph obviously uses the UHD Source block to capture the baseband data, but the Python scripts (e.g. those mentioned above) also now work with UHD. The legacy USRP code is actually untouched as I've written a thin wrapper for UHD that makes any UHD-compatible device accessible through the legacy interface (i.e. brought 'from gnuradio import usrp' & usrp.source_c back). Not the best approach to force projects to move to UHD properly, but a temporary measure in the meantime ;) I'll post some code soon! Kind regard, Balint

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