December 2013 - op25-dev - lists.osmocom.org

chan_usrp in asterisk idea
by Ryan Schilder 30 Dec '13

30 Dec '13

Hi everyone, After getting the repeater working in op25/asterisk i'm still stuck with the problem of PTT control. I see on the app_rpt page there are instructions for modifying a CM108 usb sound card (which i attempted to order, but the order got cancelled because they are on backorder...). I was reading this page http://yo3iiu.ro/blog/?p=324 and was wondering if something similar could be done with the chan_usrp in asterisk (or soundcard_tx.py in op25). The part that interested me was using a serial connection to do the signaling for PTT. Just a thought, Ryan KC9GMY

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soundcard transmitter update
by Ryan Schilder 30 Dec '13

30 Dec '13

Alright all, good news! With Max's help I was able to get the p25 repeater working with Asterisk and app_rpt. I connected the audio out to a custom cable connected to my yaesu ft-7800r's data port. I did notice that if a ctcss tone is not specified a p25 stream will be constantly transmitted. This is the case if using an analog or p25 source. I still have to play with the levels a bit, but it seems to be working very well. Also, I was able to talk to other ham's on a local repeater using op25_audio_tx.py. They were able to hear my voice 100% (no dropped packets). This is very good news! -Ryan KC9GMY

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help with repeater
by Ryan Schilder 28 Dec '13

28 Dec '13

ok i'm about ready to pull my hair out with this one. Can anyone get the op25 repeater to work? I'm trying to run disc_tap.py and it always gives me the same error: chan_usrp_rx expected 4 arguments, got 3 I've looked through the disctap_rx.py and repeater.py at the appropriate lines. I see where disctap_rx.py is calling chan_usrp_rx with 3 variables, and i see where repeater.py expects 4 variables. Now what? -Ryan KC9GMY

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P25 at 800MHz
by Jacob Blanks 27 Dec '13

27 Dec '13

Hi folks! I don't no if this is the right way to request help regarding op25. Let me try :). I am trying Op25 decoder (scope.py) + USRP. Although I can get the air interface signal, the error rate is too high and the voice signal is rarely intelligible. The radio I have is setup in direct mode in 800MHz (a bit higher than the ones I saw in previous work). Using the signal analyzer app (osmocom_fft.py) I can detect the signal with a high power level using the same antennae and gain settings. I have already run the scope.py (osmocom) and got the audio and radio info. It seems that the scope.py+USRP request a high frequency offset (7.5kHz) to tune the carrier and try to decode the air interface signals. I have: USRP_N210+WBX+tuned_antenna+Ubuntu+GNURADIO-3.6.5.1+OP25_osmocom. May the higher frequency request another setup I missed? Am I missing many details? :) TIA

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Raspberry pi op25
by Ryan Schilder 26 Dec '13

26 Dec '13

Think it would be possible to make an op25 repeater out of a raspberry pi? I literally know just about nothing on the pi, so I won't be shocked if it's not possible. I've managed to get the transmit side of op25 working with a yaesu ft7800r. It would be sweet to get a cheap p25 repeater made. Just a thought. Ryan kc9gmy On Dec 24, 2013 1:21 AM, "Steve Glass" <stevie.glass(a)gmail.com> wrote: > > > The server is now back up and the git stuff all ok. To clone from git > you can just run: > > git clone git://op25.osmocom.org > > The wiki will need updating to reflect this and we shall start hosting > tarballs as attachments on the build instructions page. > >

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WARNING - op25.osmocom.org is temporarily going off the air
by Steve Glass 24 Dec '13

24 Dec '13

Hi Everybody! As I've mentioned elsewhere we're taking the osmocom trac instance offline whilst we switch to the new git repository. The site may be down for around eight hours or so. Once restored we'll have a period where the build guides do not reflect the current codebase. I shall modify the build guide (unless I can find a volunteer) to refer to the tarballs and have a subsection on building from git. All this is because we want to do more new things and we're trying to limit the number of build steps and external dependencies to make things easier to install and use. Once this is up we may even start responding to tickets :) Steve

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ecc for ldu1 and ldu2 [4 Attachments]
by Matt D 21 Dec '13

21 Dec '13

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 i improved the ecc for the ldu1 and ldu2. I added clearer comments, shortened the code/lowered the amount of calculations it does, and put the entire routine into one function. I have been running it for days now with no seg fault. - -- - ------ Matt D - ------------ -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.21 (GNU/Linux) Comment: MacGPG2 - http://www.gpgtools.org/macgpg2.html Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJStbhgAAoJECrdp7MWSIVbtHMIAJ71NZzINEGpLdFLjzA5HxKo QVK6dTw1hc8JusFRO+49pYAi3CXonu+RS66MDHhdZVZ8bvUHjalMa9rrxz6DWAEl pmHDE1XMKJ6+alm0ZwykvkK0JNomEy4LV6x+Q+uBq/D1hRc4ak/B87kvwfEnqx1q Mk3sHJgGKY5KXgLs3hkYw2ws9tUuu2he/K9o8UanP2NfepdSAmK0IYKZHDpMJLya qYBjTdn2GlKih5l1EppBsFgRubDTjSPCKnriZ8f0IuqRWl53HdmLLAU1XglxuIwe Cph1AJXYUkiYG9uET8ym03EWXqlO1z3ZNeLZXSyp7iY4xFMHLyee+V3HS1mY/G0= =410A -----END PGP SIGNATURE-----

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transmitting nac
by Ryan Schilder 16 Dec '13

16 Dec '13

Can the nac be changed for transmitting? Haven't had a ton of time to look through the source. Ryan kc9gmy On Dec 16, 2013 11:29 AM, "Matt D" <md123(a)nycap.rr.com> wrote: > > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Hi, > Would it be possible to add scanning capability to op25 so we could > scan a list of freqs or search for active freqs within some range? > > If adding this feature is possible where would one start? > - -- > - ------ > Matt D > - ------------ > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v2.0.21 (GNU/Linux) > Comment: MacGPG2 - http://www.gpgtools.org/macgpg2.html > Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ > > iQEcBAEBAgAGBQJSrzhgAAoJECrdp7MWSIVbL8oH/2LVZBAkNvVUNBmhzCmnz7Uu > d86hfbmWA1GvjgMfNggp0PWgsEycbLIFq/syvTHQn8O0vjKGz0CF+3wgZ7bFujPt > 6vMobr8iINNDub4n1bKsfLPiPzHpRt9paDB7M8Y0VszQrewaHYqNRp7/HFnMWkkO > pOhUWJEeyn2Bv0MgNTAWt5owtJxjLtUCRDGcalXbSFWdrAr8BZdcG85htl55F3uE > pd7DNKZgtR+dldJeRplih6bbSpDZbBxsbjOff59Wp892HhgIYsYGa7NhtFZe3BA5 > Y7GVnhEiX4fKunyCYzAtm0DwgjmsmE6Jn4V+ptN40m0I/sJIe6I/DoayvkiFduA= > =ApBi > -----END PGP SIGNATURE----- > >

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scanning capability
by Matt D 16 Dec '13

16 Dec '13

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, Would it be possible to add scanning capability to op25 so we could scan a list of freqs or search for active freqs within some range? If adding this feature is possible where would one start? - -- - ------ Matt D - ------------ -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.21 (GNU/Linux) Comment: MacGPG2 - http://www.gpgtools.org/macgpg2.html Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJSrzhgAAoJECrdp7MWSIVbL8oH/2LVZBAkNvVUNBmhzCmnz7Uu d86hfbmWA1GvjgMfNggp0PWgsEycbLIFq/syvTHQn8O0vjKGz0CF+3wgZ7bFujPt 6vMobr8iINNDub4n1bKsfLPiPzHpRt9paDB7M8Y0VszQrewaHYqNRp7/HFnMWkkO pOhUWJEeyn2Bv0MgNTAWt5owtJxjLtUCRDGcalXbSFWdrAr8BZdcG85htl55F3uE pd7DNKZgtR+dldJeRplih6bbSpDZbBxsbjOff59Wp892HhgIYsYGa7NhtFZe3BA5 Y7GVnhEiX4fKunyCYzAtm0DwgjmsmE6Jn4V+ptN40m0I/sJIe6I/DoayvkiFduA= =ApBi -----END PGP SIGNATURE-----

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failed test on make test
by Matt D 12 Dec '13

12 Dec '13

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 i checked out 328 from the svn source and now I get this when trying to build. make[2]: Leaving directory `/home/matt/op25/blocks/src/lib' Making check in python make[2]: Entering directory `/home/matt/op25/blocks/src/python' make check-TESTS make[3]: Entering directory `/home/matt/op25/blocks/src/python' Traceback (most recent call last): File "./qa_op25.py", line 24, in <module> import op25 File "/home/matt/op25/blocks/src/lib/op25.py", line 24, in <module> _op25 = swig_import_helper() File "/home/matt/op25/blocks/src/lib/op25.py", line 16, in swig_import_helper import _op25 ImportError: /home/matt/op25/blocks/src/lib/.libs/_op25.so: undefined symbol: _ZNK4ldu23lcfEv FAIL: run_tests ================== 1 of 1 test failed ================== make[3]: *** [check-TESTS] Error 1 make[3]: Leaving directory `/home/matt/op25/blocks/src/python' make[2]: *** [check-am] Error 2 make[2]: Leaving directory `/home/matt/op25/blocks/src/python' make[1]: *** [check-recursive] Error 1 make[1]: Leaving directory `/home/matt/op25/blocks/src' make: *** [check-recursive] Error 1 matt@matt-Inspiron-1525:~/op25/blocks$ I cant shake it; any help will be much appreciated. - -- - ------ Matt D - ------------ -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.21 (GNU/Linux) Comment: MacGPG2 - http://www.gpgtools.org/macgpg2.html Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJSp30lAAoJECrdp7MWSIVbcDcH/0BdZHVshXzC1m72OfXYw4bV r1rYlYSKJCC2yslR2aM12Bf4tiEwapHRuATpNTdm+6a8FeM5nXPy/e/0N327PB42 JJ9aFLLE0e0f1KBgKwg3WJwpjEl2tSyVfr16bn1BrkpukwDHIXylyFkPQQSAeQGK 3FkWkAf10ivDbyJHUqF8wAIiSmoz8satXAvR+lkS2n0WLXQqxAUPfwzOj+/IdLza HY3lFhkn+FAvThzCewmiX9pYGzSW6jU3ZdbCRXgtkRus+srIxSkhrBRSZ1u1L5BK mfeVuNobRp+LMZ8OWBN79XiJ1ySPPj6ZHAxx4CKy3DqvOlg3VHEOSxemYKINBgg= =QR5x -----END PGP SIGNATURE-----

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