Re: Error attempting to use AirSpy with osmocom source block

nchan is already a block parameter (nchan=1 in your grc), and it's added for you as numchan, as seen in the args in your error message.

After trying everything else, I deleted the spaces from the args and the error went away!

On Sat, Jul 17, 2021 at 2:41 PM Ellie White <elliewhite1420@gmail.com> wrote:

Hi all,

I hope you're doing well and having a good weekend. I had a question I thought someone here might be able to answer; I'm attempting to get an AirSpy dongle to work properly with GNU Radio but am running into some issues. I attempted to install the right dependencies for the AirSpy (https://github.com/airspy/airspyone_host) and then installed the gr-osmosdr module (the gr-3.8 branch, as I still have GNURadio 3.8 installed), but when I put "airspy=0, bias=1, pack=0" in the "Device Arguments" field of my osmocom Source block and tried running my flowgraph, it gives me the following output:

Generating: '/home/ellie/src/gr-ata/examples/usrp_2chrx.py'

Executing: /usr/bin/python3 -u /home/ellie/src/gr-ata/examples/usrp_2chrx.py

linux; GNU C++ version 7.3.0; Boost_106501; UHD_003.010.003.000-0-unknown

Traceback (most recent call last):
  File "/home/ellie/src/gr-ata/examples/usrp_2chrx.py", line 267, in <module>
    main()
  File "/home/ellie/src/gr-ata/examples/usrp_2chrx.py", line 243, in main
    tb = top_block_cls(fc=options.fc, gaindB=options.gaindB, samp_rate=options.samp_rate, src_name=options.src_name, timestamp=options.timestamp)
  File "/home/ellie/src/gr-ata/examples/usrp_2chrx.py", line 131, in __init__
    args="numchan=" + str(1) + " " + 'airspy=0, bias=1, pack=0, nchan=1'
  File "/usr/lib/python3/dist-packages/osmosdr/osmosdr_swig.py", line 1170, in make
    return _osmosdr_swig.source_make(*args, **kwargs)
RuntimeError: Wrong device arguments specified. Missing nchan?

I also tried adding "nchan=1" to the "Device Arguments" field but that didn't work either and resulted in the same error. I've attached my flowgraph for reference. (Note that I made sure my AirSpy dongle was plugged in before running it). Any ideas you might have on how to solve this would be much appreciated, thanks in advance!

Cheers,

Ellie

--

Ellie White (she/her)
304-654-9381

Physics Major / Student Researcher

Marshall University