• Add FileClient2 which reports errors by raising exceptions. See (#327) for rationale.


  • Move to Nunavut Version 2 See (#318) for details on the internal changes.


  • Added support for the Socketcand interface. See (#306) for details on the changes.


  • Made PythonCAN support better.


  • Updated the Serial frame format to match the UDP frame format. See (#266) for a general description of the changes.


  • Cyphal/UDP: Service transfer are also multicast now. Make sure to take into account the updated IP mapping specifications. See (post).



  • Add pycyphal.transport.can.CANTransport.spoof_frames() for compatibility with 3rd-party CAN protocols sharing the network interface with PyCyphal.


  • Implement DSDL compilation via import hooks (#236).


  • Cyphal/CAN: Support GS USB adapter via PythonCAN (#212).

  • Cyphal/CAN: Adjust SocketCAN socket behavior to avoid ENOBUFS (#234).

  • Cyphal/CAN: Add media that reads standard CAN bus log files created by the candump utility (part of SocketCAN).


  • Subscription synchronizer added (#65).

  • v1.8.1: Port factory methods in pycyphal.application.Node that accept direct port-ID always update the registry.

  • v1.8.2: Fix error handing in pycyphal.transport.redundant.RedundantOutputSession.send(); see #222.

  • v1.8.3:

    • DiagnosticPublisher: do not instantiate the publisher if the local node is anonymous.

    • publish_soon(): Do not log error if closed.

    • Client and Publisher: fix edge cases related to PortClosedError when the interface becomes unavailable.

    • Fix assertion failure during register value coercion.

    • SocketCAN: close the media instance automatically on unrecoverable errors like ENODEV, ENXIO, EBADF, EBADFD, etc.

  • v1.8.4:

    • Actualize the Demo (mostly Yakut-related).



  • The library renamed from PyUAVCAN to PyCyphal and republished under the new name.


  • Behavior of the redundant output session changed: pyuavcan.transport.redundant.RedundantOutputSession.send() returns as soon as at least one inferior is done transmitting, the slower ones keep transmitting in the background. In other words, the redundant transport now operates at the rate of the fastest inferior (used to be the slowest one).

  • Implement the DSDL UX improvement described in #147.

  • Fully adopt PEP 585 in generated code.


  • Support Python 3.10.

  • Deprecate property pyuavcan.transport.Transport.loop and the corresponding constructor argument. The constructor argument is now ignored and the aforementioned property is an alias of asyncio.get_event_loop().

  • Generated classes include convenience aliases of the newest minor version per major version (Nunavut #193).

  • Remove the NumPy <= 0.17 version constraint.

  • Improve type annotations in generated code thanks to the new NumPy typing support.

  • Support assignment of memoryview to uint8-typed arrays.

  • Rename installation extras by replacing underscores with the minus character; e.g., transport_can_pythoncan –> transport-can-pythoncan.

  • Improve logging and error reporting.

  • Fix issues related to UDP packet capture.


  • pyuavcan.transport.can: Add Python-CAN media driver. The corresponding installation extra is transport_can_pythoncan.

  • Support packet capture and tracing for all transports (spoofing is implemented for all transports except UAVCAN/UDP). Refactor the unstable capture/tracing API to model the underlying protocols more accurately.

  • Add pyuavcan.application.file.FileServer/FileClient implementing the standard file service uavcan.file.

  • Constructor parameter anonymous for UDPTransport has been deprecated in favor of local_node_id.

  • Refactor the Node API (#154):

    • Add factory function make_node().

    • Implement the UAVCAN Register API and add port construction factory methods that take port-ID from the registry. This is a major change that allows applications to avoid hard-coding any port-ID whatsoever. The respective configuration is now sourced from the registers, which in turn are read from environment variables and from persistent register files (i.e., configuration files).

    • Support context manager API (__enter__, __leave__).

    • Rework the demo accordingly.

  • In pyuavcan.dsdl: rename generate_package into compile, add compile_all.


First stable release. v1.0 was never released for legacy reasons.