osmocom-sdr

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28 Feb '14

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sdrangelove, make gives error
by Ben Z en de rest 28 Feb '14

28 Feb '14

Hi, I am trying to build sdrangelove on Ubuntu 12.04 LTS. I did manually install cmake to have the required newer version. I did install Qt 5.2 and had cmake run with cmake ../ -DCMAKE_PREFIX_PATH=/home/pe2bz/Qt/5.2.1/gcc/lib/cmake After that, running make fails with this error: [ 68%] Building CXX object CMakeFiles/sdrbase.dir/sdrbase_automoc.cpp.o Linking CXX shared library libsdrbase.so /home/pe2bz/Qt/5.2.1/gcc/lib/libQt5Core.so.5.2.1: could not read symbols: File in wrong format collect2: ld gaf exit-status 1 terug make[2]: *** [libsdrbase.so] Fout 1 make[1]: *** [CMakeFiles/sdrbase.dir/all] Fout 2 make: *** [all] Fout 2 I did a google search on the File in wrong format message but I can not find a solution related to libsdrbase.so Can anyone help me with this ? Thanks, Ben

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by mailman＠lists.osmocom.org 25 Feb '14

25 Feb '14

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rtl_tcp problem or not?
by Favati 25 Feb '14

25 Feb '14

Hi there! I'm using a dongle on a raspberry + rtl_tcp and sdrsharp on another machine (quad core.... 3gb ram...good machine!) The problem occour at 00:57 http://www.youtube.com/watch?v=4E2MPfEzEi8 and at 1:34 in this video: http://www.youtube.com/watch?v=8snz1wQSRpw If i stop and start sdrsharp, it works ok for some minutes...then the problem is up again! No errors appear on the console of raspberry/rtl_tcp I'm not able to understand if it's a problem of rtl_tcp,raspberry or whatelse... Things i've tryed: 1) Changed the samplerate 2) Changed the raspberry (tested tp1/tp2 too...getting 4.98v!!!) 3) Changed the dongle 4) Updated sdrsharp The dongles tryed work ok on a pc I've no more idea.... Anyone can help me? PS: If someone know a program that works in linux and is similar to sdrsharp AND CAN INTERFACE TO A REMOTE RTL_TCP...

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RTL Z-Wave decoder
by Anders Lynge Esbensen 24 Feb '14

24 Feb '14

For those who are interested I wrote a Z-Wave frame decoder for the rtl-sdr, it can be found here: https://github.com/andersesbensen/rtl-zwave The frame decoder is able to decode Z-Wave 9.6/40 and 100 kbps frames. The frames are written in a pcap file format and piped to wireshark. /Anders

1 0

LTE-Cell-Scanner now support TD-LTE!
by Jiao Xianjun 20 Feb '14

20 Feb '14

Hi there, As LTE-Cell-Scanner doesn't support TDD mode: https://github.com/Evrytania/LTE-Cell-Scanner I fork LTE-Cell-Scanner and add TDD support to it: https://github.com/JiaoXianjun/LTE-Cell-Scanner (Not reviewed by James Peroulas, so it is just experimental currently.) It works fine with rtl-sdr E4k tuner dongle below 2.2GHz, but doesn't work in 2.5~2.7GHz even with external MMDS-LNB. Because the algorithm assumes analytic relationship between carrier and sampling frequency error. I write some matlab scripts (https://github.com/JiaoXianjun/rtl-sdr-LTE ) to separate carrier and sampling processing in algorithm. Aided by MMDS-LNB, the scripts can detect TDD&FDD LTE cell in 2.5~2.7GHz now! 12 LTE Cells information are decoded. 2 are FDD LTE, the rest are TD-LTE. Because here is China! (Partly because that TD-LTE is announed earier than FDD by government) Hope that in the future these features can be merged to original LTE-Cell-Scanner. Scanning results and video are attached. http://www.youtube.com/watch?v=4zRLgxzn4Pc

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MODE C decoding
by Allan Healy 18 Feb '14

18 Feb '14

Hi, My name is Allan an I am currently working on my final year project for college. The idea is to create a radar system that interprets MODE C interrogation signals and replies by aircraft and SSR and with this information determine where these airplanes are in your vicinity. The device I am using to receive these transmissions is a DVB-T dongle. I will have to create an algorithm that will use the ping of the above transmissions which I am aware of. My problem is that I am having difficulty understanding how I will decode the signal to read the altitude and differentiate between other aircraft transmitting on the 1090MHz frequency. Could anyone in this forum point me in some direction as to how to learn this? Also apologies if I am unclear. Regards Allan

4 6

receiving specturm range
by 393775602 17 Feb '14

17 Feb '14

Hi. I just use the the RTL2832U and Rt820t dongle to scan the wireless and draw the specturm of what i get. But i find the data i calculate is never bigger than -46dbm also never smaller than -63dbm.Is that the dongle's receiving ability is just like that? By the way, here is how i test the dongle: 1、i turn on a basestaion 2、i used the gsm module to detect the power of basestaion nearby,i get about -20dbm as the biggest 3、i used the dongle which i set its working frequency to the frequency that basestaion used 4、i calculate the spectrum using the data return by dongle(honestly, i used the rtl_power to calculate) the result i calculate is never big than -46dbm,what a difference from the result from gsm module. So i wonder whether the dongle's receiving abllity is just ordinary or the way i calculate is wrong?

1 0

Build Problem: gr-osmosdr and FreeBSD
by Kevin McQuiggin 15 Feb '14

15 Feb '14

Hi All: I have gnuradio 3.6 running under FreeBSD 9.2. This is the latest port of gnuradio on that platform. I would like to build gr-osmosdr so that I can use my Realtek USB dongle under gnuradio-companion. I followed the procedure at http://sdr.osmocom.org/trac/wiki/GrOsmoSDR: 1) Got the source: git clone git://git.osmocom.org/gr-osmosdr cd gr-osmosdr/ 2) Followed the direction for use with gnuradio 3.6: git checkout gr3.6 3) Created the build environment: mkdir build cd build/ cmake ../ 4) However, "make" fails with the following error: make [ 24%] Building CXX object lib/CMakeFiles/gnuradio-osmosdr.dir/rtl/rtl_source_c.cc.o /home/kevin/gr-osmosdr/lib/rtl/rtl_source_c.cc: In member function 'virtual osmosdr::freq_range_t rtl_source_c::get_freq_range(size_t)': /home/kevin/gr-osmosdr/lib/rtl/rtl_source_c.cc:468: error: 'RTLSDR_TUNER_R828D' was not declared in this scope /usr/local/include/boost/system/error_code.hpp: At global scope: /usr/local/include/boost/system/error_code.hpp:222: warning: 'boost::system::posix_category' defined but not used /usr/local/include/boost/system/error_code.hpp:223: warning: 'boost::system::errno_ecat' defined but not used /usr/local/include/boost/system/error_code.hpp:224: warning: 'boost::system::native_ecat' defined but not used *** [lib/CMakeFiles/gnuradio-osmosdr.dir/rtl/rtl_source_c.cc.o] Error code 1 Stop in /usr/home/kevin/gr-osmosdr/build. *** [lib/CMakeFiles/gnuradio-osmosdr.dir/all] Error code 1 Stop in /usr/home/kevin/gr-osmosdr/build. *** [all] Error code 1 Stop in /usr/home/kevin/gr-osmosdr/build. I did some research on the error and the missing declaration. While there is a previous post from another person who experienced this error, I can't follow the proven solution of "upgrade to gnuradio 3.7" as I expect that this would not be trivial, and in fact very complex, under FreeBSD. I have no porting/port conversion experience. Just thought I'd ask if anyone else has experienced this, and whether there is a known solution. Thanks, Kevin

2 3

AMR Receiver
by Douglas Hall 14 Feb '14

14 Feb '14

I just recently finished an rtl-sdr based automatic meter reading receiver for smart commodity meters, thought it might be useful to add to the list of known applications table on the wiki. I don't currently have a trac account so I cannot add it myself. Name: rtlamr Source: https://github.com/bemasher/rtlamr Blog Post: http://bemasher.github.io/rtlamr/2014/02/08/innards.html -BeMasher

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