GNURADIO doesn't find USRP B205

[Jens Hoffmann]

Hi,

I've connected a B205mini with a Raspberry Pi4 (Raspbian OS).

The Raspberry has discovered as follows.

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

pi@raspberrypi:~ $ uhd_find_devices
[INFO] [UHD] linux; GNU C++ version 8.3.0; Boost_106700; UHD_3.15.0.HEAD-0-gaea0e2de
[INFO] [B200] Loading firmware image: /usr/local/share/uhd/images/usrp_b200_fw.hex...
--------------------------------------------------
-- UHD Device 0
--------------------------------------------------
Device Address:
    serial: 31CB597
    name: B205i
    product: B205mini
    type: b200

pi@raspberrypi:~ $ uhd_usrp_probe
+[INFO] [UHD] linux; GNU C++ version 8.3.0; Boost_106700; UHD_3.15.0.HEAD-0-gaea0e2de
[INFO] [B200] Detected Device: B205mini
[INFO] [B200] Loading FPGA image: /usr/local/share/uhd/images/usrp_b205mini_fpga.bin...
[INFO] [B200] Operating over USB 3.
[INFO] [B200] Initialize CODEC control...
[INFO] [B200] Initialize Radio control...
[INFO] [B200] Performing register loopback test...
[INFO] [B200] Register loopback test passed
[INFO] [B200] Setting master clock rate selection to 'automatic'.
[INFO] [B200] Asking for clock rate 16.000000 MHz...
[INFO] [B200] Actually got clock rate 16.000000 MHz.
  _____________________________________________________
 /
|       Device: B-Series Device
|     _____________________________________________________
|    /
|   |       Mboard: B205mini
|   |   serial: 31CB597
|   |   name: B205i
|   |   product: 30522
|   |   revision: 3
|   |   FW Version: 8.0
|   |   FPGA Version: 7.0
|   |   
|   |   Time sources:  none, internal, external
|   |   Clock sources: internal, external
|   |   Sensors: ref_locked
|   |     _____________________________________________________
|   |    /
|   |   |       RX DSP: 0
|   |   |   
|   |   |   Freq range: -8.000 to 8.000 MHz
|   |     _____________________________________________________
|   |    /
|   |   |       RX Dboard: A
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Frontend: A
|   |   |   |   Name: FE-RX1
|   |   |   |   Antennas: TX/RX, RX2
|   |   |   |   Sensors: temp, rssi, lo_locked
|   |   |   |   Freq range: 50.000 to 6000.000 MHz
|   |   |   |   Gain range PGA: 0.0 to 76.0 step 1.0 dB
|   |   |   |   Bandwidth range: 200000.0 to 56000000.0 step 0.0 Hz
|   |   |   |   Connection Type: IQ
|   |   |   |   Uses LO offset: No
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Codec: A
|   |   |   |   Name: B205mini RX dual ADC
|   |   |   |   Gain Elements: None
|   |     _____________________________________________________
|   |    /
|   |   |       TX DSP: 0
|   |   |   
|   |   |   Freq range: -8.000 to 8.000 MHz
|   |     _____________________________________________________
|   |    /
|   |   |       TX Dboard: A
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       TX Frontend: A
|   |   |   |   Name: FE-TX1
|   |   |   |   Antennas: TX/RX
|   |   |   |   Sensors: temp, lo_locked
|   |   |   |   Freq range: 50.000 to 6000.000 MHz
|   |   |   |   Gain range PGA: 0.0 to 89.8 step 0.2 dB
|   |   |   |   Bandwidth range: 200000.0 to 56000000.0 step 0.0 Hz
|   |   |   |   Connection Type: IQ
|   |   |   |   Uses LO offset: No
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       TX Codec: A
|   |   |   |   Name: B205mini TX dual DAC
|   |   |   |   Gain Elements: None

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

But using the USRP in a source block the following error occurs.

(also if I made a dedicated entry of the serial number as device address)

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Generating: '/home/pi/top_block.py'

Generating: '/home/pi/top_block.py'

Executing: /usr/bin/python2 -u /home/pi/top_block.py

qt5ct: using qt5ct plugin
[INFO] [UHD] linux; GNU C++ version 8.2.0; Boost_106700; UHD_3.13.1.0-3
[WARNING] [B200] EnvironmentError: IOError: Could not find path for image: usrp_b200_fw.hex

Using images directory: <no images directory located>

Set the environment variable 'UHD_IMAGES_DIR' appropriately or follow the below instructions to download the images package.

Please run:

 "/usr/lib/arm-linux-gnueabihf/uhd/utils/uhd_images_downloader.py"
Traceback (most recent call last):
  File "/home/pi/top_block.py", line 164, in <module>
    main()
  File "/home/pi/top_block.py", line 152, in main
    tb = top_block_cls()
  File "/home/pi/top_block.py", line 75, in __init__
    channels=range(1),
  File "/usr/lib/python2.7/dist-packages/gnuradio/uhd/__init__.py", line 122, in constructor_interceptor
    return old_constructor(*args)
  File "/usr/lib/python2.7/dist-packages/gnuradio/uhd/uhd_swig.py", line 2782, in make
    return _uhd_swig.usrp_source_make(*args)
RuntimeError: LookupError: KeyError: No devices found for ----->
Device Address:
    serial: ""


>>> Done

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

I would be vry pleased to get some hints to solve the problem.

Regards,

Jens

DL1WW