Trouble getting HackRF working with RTLSDR-Airband using SoapySDR

[Josh Simmons]

I'm trying to catch local air traffic and broadcast it to LiveATC using a HackRF One with RTLSDR-Airband through SoapySDR. I feel like I'm close to getting this working but I'm running into an issue I can't quite figure out.

The error I'm running into seems to originate from SoapySDR (but in the course of running Airband):

josh@groundcontrol:~/Desktop/RTLSDR-Airband-3.0.1$ rtl_airband -f -e

[INFO] Opening HackRF One #0 87c867dc2b2d595f...

SoapySDR: device 'driver=hackrf,device_id=0': using native sample format 'CS8' (fullScale=128.0)

RTLSDR-Airband version 3.0.1 starting

pulse: <default_server>: connecting...

[INFO] Opening HackRF One #0 87c867dc2b2d595f...

SoapySDR: device 'driver=hackrf,device_id=0': sample rate set to 8000000 sps

SoapySDR: device 'driver=hackrf,device_id=0': gain set to 0.0 dB

SoapySDR: device 'driver=hackrf,device_id=0' initialized

SoapySDR: device 'driver=hackrf,device_id=0' started

SoapySDR device 'driver=hackrf,device_id=0': readStream failed: NOT_SUPPORTED, disabling

1 device(s) failed to initialize - aborting

I suspect I'm probably missing something obvious... but maybe not :o) Please let me know if there's any additional information I can share that might help troubleshoot this.

Thank you <3

Here's some information about my set up, all running on Ubuntu 16.04:

hackrf_info produces:

 

hackrf_info version: unknown

libhackrf version: unknown (0.5)

Found HackRF

Index: 0

Serial number: 000000000000000087c867dc2b2d595f

Board ID Number: 2 (HackRF One)

Firmware Version: 2018.01.1 (API:1.02)

Part ID Number: 0xa000cb3c 0x00764f5d

SoapySDRUtil --probe="driver=hackrf" produces:

######################################################

##     Soapy SDR -- the SDR abstraction library     ##

######################################################

Probe device driver=hackrf

[INFO] Opening HackRF One #0 87c867dc2b2d595f...

----------------------------------------------------

-- Device identification

----------------------------------------------------

  driver=HackRF

  hardware=HackRF One

  clock source=internal

  part id=a000cb3c00764f5d

  serial=000000000000000087c867dc2b2d595f

  version=2018.01.1

----------------------------------------------------

-- Peripheral summary

----------------------------------------------------

  Channels: 1 Rx, 1 Tx

  Timestamps: NO

  Other Settings:

     * Antenna Bias - Antenna port power control.

       [key=bias_tx, default=false, type=bool]

----------------------------------------------------

-- RX Channel 0

----------------------------------------------------

  Full-duplex: NO

  Supports AGC: NO

  Stream formats: CS8, CS16, CF32, CF64

  Native format: CS8 [full-scale=128]

  Stream args:

     * Buffer Count - Number of buffers per read.

       [key=buffers, units=buffers, default=15, type=int]

  Antennas: TX/RX

  Full gain range: [0, 116] dB

    LNA gain range: [0, 40] dB

    AMP gain range: [0, 14] dB

    VGA gain range: [0, 62] dB

  Full freq range: [0, 7250] MHz

    RF freq range: [0, 7250] MHz

  Sample rates: 1, 2, 3, 4, 5, ..., 16, 17, 18, 19, 20 MSps

  Filter bandwidths: 1.75, 2.5, 3.5, 5, 5.5, ..., 14, 15, 20, 24, 28 MHz

----------------------------------------------------

-- TX Channel 0

----------------------------------------------------

  Full-duplex: NO

  Supports AGC: NO

  Stream formats: CS8, CS16, CF32, CF64

  Native format: CS8 [full-scale=128]

  Stream args:

     * Buffer Count - Number of buffers per read.

       [key=buffers, units=buffers, default=15, type=int]

  Antennas: TX/RX

  Full gain range: [0, 61] dB

    VGA gain range: [0, 47] dB

    AMP gain range: [0, 14] dB

  Full freq range: [0, 7250] MHz

    RF freq range: [0, 7250] MHz

  Sample rates: 1, 2, 3, 4, 5, ..., 16, 17, 18, 19, 20 MSps

  Filter bandwidths: 1.75, 2.5, 3.5, 5, 5.5, ..., 14, 15, 20, 24, 28 MHz

My rtl_airband.conf file reads:

devices:

({

  type = "soapysdr";

  device_string = "driver=hackrf,device_id=0";

  gain = 0.0;

  centerfreq = 122.7;

  sample_rate = 8.0;

  channels:

  (

    {

      freq = 122.7;

      outputs: (

        {

          type = "pulse";

        }

      );

    }

  );

});

[Josh Blum]

On 5/27/19 9:06 PM, Josh Simmons wrote:

I'm trying to catch local air traffic and broadcast it to LiveATC using a HackRF One with RTLSDR-Airband through SoapySDR. I feel like I'm close to getting this working but I'm running into an issue I can't quite figure out.

The error I'm running into seems to originate from SoapySDR (but in the course of running Airband):

josh@groundcontrol:~/Desktop/RTLSDR-Airband-3.0.1$ rtl_airband -f -e

[INFO] Opening HackRF One #0 87c867dc2b2d595f...

SoapySDR: device 'driver=hackrf,device_id=0': using native sample format 'CS8' (fullScale=128.0)

RTLSDR-Airband version 3.0.1 starting

pulse: <default_server>: connecting...

[INFO] Opening HackRF One #0 87c867dc2b2d595f...

SoapySDR: device 'driver=hackrf,device_id=0': sample rate set to 8000000 sps

SoapySDR: device 'driver=hackrf,device_id=0': gain set to 0.0 dB

SoapySDR: device 'driver=hackrf,device_id=0' initialized

SoapySDR: device 'driver=hackrf,device_id=0' started

SoapySDR device 'driver=hackrf,device_id=0': readStream failed: NOT_SUPPORTED, disabling

Did someone pass the tx stream or possibly a null stream pointer into readStream()?

Because I think thats the only way you can get SOAPY_SDR_NOT_SUPPORTED from this call

https://github.com/pothosware/SoapyHackRF/blob/master/HackRF_Streaming.cpp#L590

-josh

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