USRP: failed to start rx mode on ubuntu18.04

[liuyg851119ase]

Universal Radio Hacker (URH) choose USRP record radio signal,there was an error as followings： [ERROR::Device.py::log_retcode] USRP-OPEN (type=b200,name=MyB210,serial=30FB59C,product=B210): Error Cod e: 44 (44)

USRP-OPEN (type=b200,name=MyB210,serial=30FB59C,product=B210): Error Code: 44 (44) USRP: Could not retrieve more detailed error message from device. USRP: failed to start rx mode

[andynoack]

Please install from source and use the latest USRP drivers. This error comes directly from the driver, not from URH.

[liuyg851119ase]

Please install from source and use the latest USRP drivers. This error comes directly from the driver, not from URH.

Hi andynoack, I start from source code in command line(./main.py). I have install the uhd(the driver) and GNU radio and essential lib(I execute "sudo ldconfig" command ). I use"sudo pip3 install urh" and start "urh" in command line，It's okay. But when I execute main.py in command line. There was an error as following: liuyg@vtk:~/decore/bus_key_radio/urh/src/urh$ ./main.py Could not find C++ extensions, trying to build them. Skipping native support for airspy Skipping native support for bladerf Skipping native support for hackrf Skipping native support for limesdr Skipping native support for plutosdr Skipping native support for rtlsdr Found uhd lib. Will compile with native usrp support Skipping native support for sdrplay Compiling src/urh/cythonext/signal_functions.pyx because it changed. Compiling src/urh/cythonext/util.pyx because it changed. Compiling src/urh/dev/native/lib/usrp.pyx because it changed. [1/3] Cythonizing src/urh/cythonext/signal_functions.pyx Traceback (most recent call last): File "setup.py", line 138, in ext_modules=get_extensions(), File "setup.py", line 97, in get_extensions extensions = cythonize(extensions, compiler_directives=COMPILER_DIRECTIVES, compile_time_env=device_extras) File "/usr/lib/python3/dist-packages/Cython/Build/Dependencies.py", line 1027, in cythonize cythonize_one(*args) File "/usr/lib/python3/dist-packages/Cython/Build/Dependencies.py", line 1132, in cythonize_one result = compile([pyx_file], options) File "/usr/lib/python3/dist-packages/Cython/Compiler/Main.py", line 695, in compile return compile_multiple(source, options) File "/usr/lib/python3/dist-packages/Cython/Compiler/Main.py", line 673, in compile_multiple result = run_pipeline(source, options, context=context) File "/usr/lib/python3/dist-packages/Cython/Compiler/Main.py", line 494, in run_pipeline err, enddata = Pipeline.run_pipeline(pipeline, source) File "/usr/lib/python3/dist-packages/Cython/Compiler/Pipeline.py", line 341, in run_pipeline data = phase(data) File "/usr/lib/python3/dist-packages/Cython/Compiler/Pipeline.py", line 53, in generate_pyx_code_stage module_node.process_implementation(options, result) File "/usr/lib/python3/dist-packages/Cython/Compiler/ModuleNode.py", line 141, in process_implementation self.generate_c_code(env, options, result) File "/usr/lib/python3/dist-packages/Cython/Compiler/ModuleNode.py", line 377, in generate_c_code self.generate_module_init_func(modules[:-1], env, globalstate['init_module']) File "/usr/lib/python3/dist-packages/Cython/Compiler/ModuleNode.py", line 2234, in generate_module_init_func self.body.generate_execution_code(code) File "/usr/lib/python3/dist-packages/Cython/Compiler/Nodes.py", line 425, in generate_execution_code stat.generate_execution_code(code) File "/usr/lib/python3/dist-packages/Cython/Compiler/Nodes.py", line 425, in generate_execution_code stat.generate_execution_code(code) File "/usr/lib/python3/dist-packages/Cython/Compiler/FusedNode.py", line 831, in generate_execution_code default.generate_evaluation_code(code) File "/usr/lib/python3/dist-packages/Cython/Compiler/ExprNodes.py", line 13041, in generate_evaluation_code self.arg.generate_evaluation_code(code) File "/usr/lib/python3/dist-packages/Cython/Compiler/ExprNodes.py", line 11202, in generate_evaluation_code self.generate_div_warning_code(code) File "/usr/lib/python3/dist-packages/Cython/Compiler/ExprNodes.py", line 11205, in generate_div_warning_code in_nogil = self.in_nogil_context AttributeError: 'DivNode' object has no attribute 'in_nogil_context' Traceback (most recent call last): File "./main.py", line 189, in main() File "./main.py", line 100, in main from urh.controller.MainController import MainController File "/home/liuyg/decore/bus_key_radio/urh/src/urh/controller/MainController.py", line 9, in from urh.controller.CompareFrameController import CompareFrameController File "/home/liuyg/decore/bus_key_radio/urh/src/urh/controller/CompareFrameController.py", line 14, in from urh.awre import AutoAssigner File "/home/liuyg/decore/bus_key_radio/urh/src/urh/awre/AutoAssigner.py", line 3, in from urh.cythonext import util ImportError: cannot import name 'util' But there are util.pxd and util.pyx in urh/cythonext directory. Is it the path issue?

[andynoack]

It rather looks like wrong or missing dependencies for me, as util.pyx seems not to compile ordinary.

[liuyg851119ase]

It rather looks like wrong or missing dependencies for me, as util.pyx seems not to compile ordinary.

"Could not find C++ extensions, trying to build them." How can I install C++ extensions.

[andynoack]

This depends on your distribution, on Ubuntu it should work with apt or pip. Another possibility is using the URH docker container. I will close here because this is not directly related to URH anymore. You can ask on our slack channel for installation support.