Configuration¶

Usually this library is used with a particular CAN interface, this can be specified in code, read from configuration files or environment variables.

In Code¶

The can object exposes an rc dictionary which can be used to set the interface and channel before importing from can.interfaces.

import can
can.rc['interface'] = 'socketcan'
can.rc['channel'] = 'vcan0'
from can.interfaces.interface import Bus

bus = Bus()

On Linux systems the config file is searched in the following paths:

On Windows systems the config file is searched in the following paths:

The configuration file sets the default interface and channel:

[default]
interface = <the name of the interface to use>
channel = <the channel to use by default>

Configuration can be pulled from these environmental variables:

CAN_INTERFACE

CAN_CHANNEL

Lookup table of interface names: