I don't believe hackrf_transfer and rtl_sdr output in the same format. They are both 8 bit but the hackrf output is signed whereas the rtl output is unsigned.
If you get this working a hackrf please post the port on github or somewhere as that would be sweet. On Jun 27, 2015 4:00 PM, "Ilker Temir" <[email protected]> wrote: > Hello, > > I am trying to add HackRF support to Salvatore Sanfilippo's dump1090 tool ( > https://github.com/antirez/dump1090) as a learning exercise. The tool was > originally designed for RTL SDR devices. However, I can't seem to get this > port to work. > > To eliminate potential issues in my code, I simplified the troubleshooting > steps. Here are the basic set of troubleshooting steps I am using: > > Per tool's documentation, a data file can be captured with rtl_sdr utility > in the following way: > > rtl_sdr -f 1090000000 -s 2000000 -g 50 output.bin > > Then you can pipe it into dump1090 like this: > dump1090 --ifile output.bin > > I made an assumption that the HackRF equivalent of rtl_sdr command above > would be the following: > > hackrf_transfer -r output.bin -f 1090000000 -s 2000000 -p 0 -a 0 > -l 40 -g 62 > > However, capturing packets with HackRF this way and piping them into > dump1090 doesn't do anything. I have tried this sitting next to an airport > and capturing packets while planes were landing and taking off. I don't > have an RTL SDR dongle so I can't test the rtl_sdr command myself. It > didn't make to sense to buy a RTL SDR device after HackRF but if I can't > crack this, I am considering to buy one. > > BTW, I also tried different gain settings, and sample rate of 8e6 with > hackrf_transfer, no difference. That said, I never enabled amp_enable. > > Would anyone know if rtl_sdr and hackrf_transfer capture the packets in > the same way and format? Or do I need to do some kind of a conversion or > translation in between the two to make them compatible? > > Any help or idea will be appreciated. > > P.S. I am aware of gr-air-modes for HackRF to decode ADS-B signals. My > goal is to hack dump1090 and add HackRF support as a learning exercise. > > Thanks, > > Ilker > > _______________________________________________ > HackRF-dev mailing list > [email protected] > https://pairlist9.pair.net/mailman/listinfo/hackrf-dev > >
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