Well, if you want a basically working "cheat sheet", I already wrote a Gnuradio receiver for those keyfob transmitters:
https://github.com/bistromath/keyfob It hasn't been updated in years, so it's still on the old Automake system. It won't compile, but the source should get you started. --n On Mon, Sep 21, 2015 at 12:17 PM 0x00-0xff <0x00-0...@stienstra.me> wrote: > > Thanks, I've already red those pdf's. > The adsb grc doesn't help me enough :) > > I'm getting large binary files with 0's and 1's which doesn't resemble > the binary sequence I'm looking for... > > > On 2015-09-20 22:33, Chris Kuethe wrote: > > Check out gr-adsb > > (https://github.com/wnagele/gr-adsb/tree/master/examples) - the > > example flowgraph uses a threshold block to produce 0's and 1's. From > > there you can unpack bits to bytes, add a constant of 48 (numerical > > value of ascii '0') and come out with a character stream of '0' and > > '1', which you can then feed into a file sink (opening /dev/stdout) > > > > Also check out these tutorials: > > http://www.inguardians.com/pubs/GRC_signal_analysis_InGuardians_v1.pdf > > https://nccgroup.github.io/RFTM/ > > > https://cansecwest.com/slides/2015/From_Baseband_to_bitstream_Andy_Davis.pdf > > > > > > On Sun, Sep 20, 2015 at 1:13 PM, 0x00-0xff <0x00-0...@stienstra.me> > > wrote: > >> Hi guys, > >> > >> After trying several tutorials en demo's... I need your help. > >> > >> I'm trying to get the binary stream from a ASK/OOK modulated signal > >> (keyfobs > >> on 433mhz). > >> I've been able to manually write down the sequence and retransmit it: > >> https://github.com/0x00-0xFF/gr-x10 > >> > >> How do I get the 0's and 1's on /dev/stdout (or file). > >> The tutorials I've seen, give me a load of 0's and 1's that do not > >> match > >> the sequence I see in baudline or wx_scope > >> > >> What I realy (realy) want is, to save multiple received ASK/OOK > >> signals into > >> a file with corresponding frequency. > >> But any help is appreciated ;) > >> > >> Kind regards, > >> > >> 0x00_0xFF > >> > >> _______________________________________________ > >> Discuss-gnuradio mailing list > >> Discuss-gnuradio@gnu.org > >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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