by hardbyte

hardbyte / python-can

The can package provides controller area network support for Python developers

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The C\ ontroller A\ rea N\ etwork is a bus standard designed to allow microcontrollers and devices to communicate with each other. It has priority based bus arbitration and reliable deterministic communication. It is used in cars, trucks, boats, wheelchairs and more.


package provides controller area network support for Python developers; providing common abstractions to different hardware devices, and a suite of utilities for sending and receiving messages on a can bus.

The library currently supports Python 3.6+ as well as PyPy 3 and runs on Mac, Linux and Windows.

============================== =========== Library Version Python

2.x 2.6+, 3.4+ 3.x 2.7+, 3.5+ 4.x (currently on develop) 3.6+ ============================== ===========


  • common abstractions for CAN communication
  • support for many different backends (see the
  • receiving, sending, and periodically sending messages
  • normal and extended arbitration IDs
  • limited
    CAN FD 
    __ support
  • many different loggers and readers supporting playback: ASC (CANalyzer format), BLF (Binary Logging Format by Vector), CSV, SQLite and Canutils log
  • efficient in-kernel or in-hardware filtering of messages on supported interfaces
  • bus configuration reading from file or environment variables
  • CLI tools for working with CAN buses (see the
  • more

Example usage

.. code:: python

# import the library
import can

create a bus instance

many other interfaces are supported as well (see below)

bus = can.Bus(interface='socketcan', channel='vcan0', receive_own_messages=True)

send a message

message = can.Message(arbitration_id=123, is_extended_id=True, data=[0x11, 0x22, 0x33]) bus.send(message, timeout=0.2)

iterate over received messages

for msg in bus: print("{:X}: {}".format(msg.arbitration_id,

or use an asynchronous notifier

notifier = can.Notifier(bus, [can.Logger("recorded.log"), can.Printer()])

You can find more information in the documentation, online at 


If you run into bugs, you can file them in our

issue tracker 
__ on GitHub.

There is also a

__ mailing list for development discussion.

__ has several questions and answers tagged with

Wherever we interact, we strive to follow the

Python Community Code of Conduct 



__ for getting started.

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