SDR gnuradio RTL-SDR x N900 - Page 4 - maemo.org

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xes	2013-09-11 , 08:03
Posts: 638 \| Thanked: 1,692 times \| Joined on Aug 2009	#31

Originally Posted by biketool

BTW the dongle I have has a PAL antenna connector for those wanting to geek on some satellite passes. Is there libgnuradio-NOAA for grabbing weather sats in your build? answer = $/gnuradio/lib/libgnuradio-noaa-3.6.5.1.so

Here the list of the libs included into latest gnuradio (3.6.5.1) build:

libgnuradio-analog-3.6.5.1.so
libgnuradio-atsc-3.6.5.1.so
libgnuradio-audio-3.6.5.1.so
libgnuradio-blocks-3.6.5.1.so
libgnuradio-comedi-3.6.5.1.so
libgnuradio-core-3.6.5.1.so
libgnuradio-digital-3.6.5.1.so
libgnuradio-fcd-3.6.5.1.so
libgnuradio-fft-3.6.5.1.so
libgnuradio-filter-3.6.5.1.so
libgnuradio-noaa-3.6.5.1.so
libgnuradio-osmosdr-0.0.3git.so
libgnuradio-pager-3.6.5.1.so
libgnuradio-trellis-3.6.5.1.so
libgnuradio-video-sdl-3.6.5.1.so
libgnuradio-vocoder-3.6.5.1.so
libgnuradio-wavelet-3.6.5.1.so
libgruel-3.6.5.1.so
libvolk.so

Talking about POCSAG... yes you can decode it with included multimon-ng:

Here an example:
http://eliasoenal.com/2012/05/24/multimonng/
(the process seem to work also into a raspberry pi using half cpu....so why not into the N900?)

Then, multimon-ng can decode APRS AX25 AFSK DTMF CTCSS ... could you imagine?

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	Estel	2013-09-11 , 09:11
	Posts: 5,028 \| Thanked: 8,613 times \| Joined on Mar 2011	#32

I still don't see *or* understand why it couldn't land in extras-devel.

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xes	2013-09-11 , 09:43
Posts: 638 \| Thanked: 1,692 times \| Joined on Aug 2009	#33

Originally Posted by Estel

I still don't see *or* understand why it couldn't land in extras-devel.

So far, no one has reported this PRE-APLHA experiment as "sometimes for me it works" or "yeah useful! I managed to receive..." or "it works but we have not enough speed to... " or at least "just tried - it does not work at all"...

...And i'm missing the most important requirement needed to package all this bunch of libs... TIME

Last edited by xes; 2013-09-11 at 09:46.

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biketool	2013-09-11 , 10:06
Posts: 1,417 \| Thanked: 2,619 times \| Joined on Jan 2011 @ Touring	#34

Xes, this is ridiculously bad@$$ and since I have the hardware on hand I will give it a test once I am sure what to link where. For example the contents of folder gnuradio symlink to /usr?
What dependencies are required since we are hand installing?

Last edited by biketool; 2013-09-11 at 10:22.

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xes	2013-09-11 , 10:43
Posts: 638 \| Thanked: 1,692 times \| Joined on Aug 2009	#35

Originally Posted by biketool

Xes, this is ridiculously bad@$$ and since I have the hardware on hand I will give it a test once I am sure what to link where. For example the contents of folder gnuradio symlink to /usr?
What dependencies are required since we are hand installing?

You could start installing:

apt-get install libfftw3-3 xml-core python-lxml liborc-0.4-0 python-numpy libportaudio2 libjack0 libsdl1.2 python2.5-qt4 libqt4-core libqt4-gui libqt4-svg libqt4-xml libboost-thread1.42.0 libboost-filesystem1.42.0 libboost-date-time1.42.0 libboost-program-options1.42.0 libboost-system1.42.0 libice6 libasound2 libexpat1

(the other requirements are into the tar provided in first post: libusb-1, swig 2.0.3, python cheetah)

Then unpack all the tar.gz in /opt, add the library paths into /etc/ld.so.conf or create in /usr/lib the symbolink links to the libs contained into the tar.
In this way every app could use all this libs.

You could also:
ln -s /opt/rtl_sdr/bin/rtl_fm /usr/bin/rtl_fm

Last edited by xes; 2013-09-12 at 21:46.

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biketool	2013-09-11 , 10:56
Posts: 1,417 \| Thanked: 2,619 times \| Joined on Jan 2011 @ Touring	#36

No not bad=bad/crap but bada$s as in (bad=ultra awesome)
thanks for the leads, will try this within 24hrs(I hope)

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szopin	2013-09-11 , 16:53
Posts: 2,076 \| Thanked: 3,268 times \| Joined on Feb 2011	#37

Originally Posted by xes

So far, no one has reported this PRE-APLHA experiment as "sometimes for me it works" or "yeah useful! I managed to receive..." or "it works but we have not enough speed to... " or at least "just tried - it does not work at all"...

...And i'm missing the most important requirement needed to package all this bunch of libs... TIME

Reporting in (3.6.5.1 version tested):
radio (rtl_fm) works!
gqrx - GUI works when started by user, but this leaves radio off as it needs root, sadly gui segfaults when run as root

Has anyone managed to get dvb running with mplayer? I have channels.conf file in ~/.mplayer but it still complains 'DVB CONFIGURATION IS EMPTY, exit'. Probably not enough processing power, but would still be fun to try (with OC might even work, though this will kill the battery very quickly)

EDIT: forgot to mention and someone might find this helpful, to avoid mass symlinking I just dumped all .so's in one folder and use 'export LD_LIBRARY_PATH=<folder>' before running any of the progs, seems to work fine

Last edited by szopin; 2013-09-11 at 17:03.

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xes	2013-09-11 , 17:00
Posts: 638 \| Thanked: 1,692 times \| Joined on Aug 2009	#38

Originally Posted by szopin

Reporting in (3.6.5.1 version tested):
radio (rtl_fm) works!
gqrx - GUI works when started by user, but this leaves radio off as it needs root, sadly gui segfaults when run as root

Has anyone managed to get dvb running with mplayer? I have channels.conf file in ~/.mplayer but it still complains 'DVB CONFIGURATION IS EMPTY, exit'. Probably not enough processing power, but would still be fun to try (with OC might even work, though this will kill the battery very quickly)

Please try to chmod the rtl_sdr usb device /dev/xxx (i can't remember ..) then start gqrx as user.
Check if it segfaults due a missing library....
Or try the older gqrx.

Talking about dvb, we don't have the dvb driver for the rtl_sdr devices into kernel power.
If we had this kind of module, we should unload it before use rtl_fm.

Last edited by xes; 2013-09-11 at 17:04.

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szopin	2013-09-11 , 18:05
Posts: 2,076 \| Thanked: 3,268 times \| Joined on Feb 2011	#39

Originally Posted by xes

Please try to chmod the rtl_sdr usb device /dev/xxx (i can't remember ..) then start gqrx as user.
Check if it segfaults due a missing library....
Or try the older gqrx.

Talking about dvb, we don't have the dvb driver for the rtl_sdr devices into kernel power.
If we had this kind of module, we should unload it before use rtl_fm.

rwxed usbdev1.58_ep81, changed ownership to user:users, added rtl-sdr.rules to udev... works

(probably udev rules was all that was needed, used this one http://www.sendspace.com/file/p2cvl0 then 'sudo cp rtl-sdr.rules /etc/udev/rules.d/15-rtl-sdr.rules' and finally
'sudo udevadm control --reload_rules')

wow, this really gets crazy on the battery, hopefully just a fluke

Attached Images

Last edited by szopin; 2013-09-11 at 18:27. Reason: added battery pic

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xes	2013-09-11 , 20:29
Posts: 638 \| Thanked: 1,692 times \| Joined on Aug 2009	#40

Originally Posted by szopin

rwxed usbdev1.58_ep81, changed ownership to user:users, added rtl-sdr.rules to udev... works (probably udev rules was all that was needed, used this one http://www.sendspace.com/file/p2cvl0 then 'sudo cp rtl-sdr.rules /etc/udev/rules.d/15-rtl-sdr.rules' and finally
'sudo udevadm control --reload_rules')

wow, this really gets crazy on the battery, hopefully just a fluke

Yep... probably the battery charge goes down just like in a free fall...
BUT pay attention that during host-mode you can't read the battery status because bme is disabled so i suppose that battery-eye reads always a 0% battery as soon as you switch the usb mode.