[Hackrf-dev] Adding HackRF support to dump1090

[Donald Pupecki]

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" <ilker at ilkertemir.com> 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
>
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>
>
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