[Hackrf-dev] Adding HackRF support to dump1090

[Tom]

62 I mean.

 

From: HackRF-dev [mailto:hackrf-dev-bounces at greatscottgadgets.com] On Behalf
Of Tom
Sent: Monday, 29 June 2015 9:44 AM
To: hackrf-dev at greatscottgadgets.com
Subject: Re: [Hackrf-dev] Adding HackRF support to dump1090

 

Thanks for making this, I think the default vga gain of 60 is quite much, I
had better luck with around 28.

 

Have only been running it for a few min so I cant compare yet.

 

 

From: HackRF-dev [mailto:hackrf-dev-bounces at greatscottgadgets.com] On Behalf
Of Ilker Temir
Sent: Monday, 29 June 2015 3:16 AM
To: hackrf-dev at greatscottgadgets.com
<mailto:hackrf-dev at greatscottgadgets.com> 
Subject: Re: [Hackrf-dev] Adding HackRF support to dump1090

 

Here it goes: https://github.com/itemir/dump1090_hackrf

I can get some reception from my window with the standard HackRF antenna.

Ilkers-MacBook-Pro:dump1090_hackrf itemir$ ./dump1090 
No supported RTLSDR devices found.
HackRF successfully initialized (AMP Enable: 0, LNA Gain: 40, VGA Gain: 62).
*5dab7437d7920a;
CRC: d7920a (ok)
Single bit error fixed, bit 10
DF 11: All Call Reply.
  Capability  : Level 2+3+4 (DF0,4,5,11,20,21,24,code7 - is on airborne)
  ICAO Address: ab7437

*5fa69b92ccd411;
CRC: ccd411 (ok)
Single bit error fixed, bit 13
DF 11: All Call Reply.
  Capability  : Level 7 ???
  ICAO Address: a69b92

*5dab9091529b68;
CRC: 529b68 (ok)
Single bit error fixed, bit 24
DF 11: All Call Reply.
  Capability  : Level 2+3+4 (DF0,4,5,11,20,21,24,code7 - is on airborne)
  ICAO Address: ab9091

Feedback and contributions welcome.

On 6/27/15 7:27 PM, Tom wrote:

Well done.

 

Look forward to trying this out.

 

From: HackRF-dev [mailto:hackrf-dev-bounces at greatscottgadgets.com] On Behalf
Of Ilker Temir
Sent: Sunday, 28 June 2015 11:49 AM
To: Donald Pupecki
Cc: hackrf-dev at greatscottgadgets.com
<mailto:hackrf-dev at greatscottgadgets.com> 
Subject: Re: [Hackrf-dev] Adding HackRF support to dump1090

 

Thanks! signed to unsigned conversion was the culprit. I first tested it
with cox by converting the file and then tweaked my code to do that within
the receive path. 

I now have a working port of dump1090 to HackRF. I need to do some cleanup
but as soon as done, will post it on GitHub and announce on this forum.

On 6/27/15 1:29 PM, Donald Pupecki wrote:

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
<mailto: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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