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LGPL-3.0

python-can

Latest Version on PyPi Supported Python implementations Downloads on PePy Monthly downloads on PePy This project uses the black formatter.

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The Controller Area Network 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.

The can 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+

Features

  • common abstractions for CAN communication
  • support for many different backends (see the docs)
  • receiving, sending, and periodically sending messages
  • normal and extended arbitration IDs
  • 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 a file or from environment variables
  • command line tools for working with CAN buses (see the docs)
  • more

Example usage

# 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, msg.data))

# 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 python-can.readthedocs.org.

Discussion

If you run into bugs, you can file them in our issue tracker on GitHub.

There is also a python-can mailing list for development discussion.

Stackoverflow has several questions and answers tagged with python+can.

Wherever we interact, we strive to follow the Python Community Code of Conduct.

Contributing

See doc/development.rst for getting started.

GNU LESSER GENERAL PUBLIC LICENSE Version 3, 29 June 2007 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. This version of the GNU Lesser General Public License incorporates the terms and conditions of version 3 of the GNU General Public License, supplemented by the additional permissions listed below. 0. Additional Definitions. As used herein, "this License" refers to version 3 of the GNU Lesser General Public License, and the "GNU GPL" refers to version 3 of the GNU General Public License. "The Library" refers to a covered work governed by this License, other than an Application or a Combined Work as defined below. An "Application" is any work that makes use of an interface provided by the Library, but which is not otherwise based on the Library. 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