Listeners

Listener

The Listener class is an "abstract" base class for any objects which wish to register to receive notifications of new messages on the bus. A Listener can be used in two ways; the default is to call the Listener with a new message, or by calling the method on_message_received.

Listeners are registered with :ref:`notifier` object(s) which ensure they are notified whenever a new message is received.

Subclasses of Listener that do not override on_message_received will cause NotImplementedError to be thrown when a message is received on the CAN bus.

.. autoclass:: can.Listener
    :members:

BufferedReader

.. autoclass:: can.BufferedReader
    :members:

Logger

The :class:`can.Logger` uses the following :class:`can.Listener` types to create .asc, .csv and .db files with the messages received.

.. autoclass:: can.Logger
    :members:

Printer

.. autoclass:: can.Printer
    :members:

CSVWriter

.. autoclass:: can.CSVWriter
    :members:

SqliteWriter

.. autoclass:: can.SqliteWriter
    :members:

ASCWriter

Logs CAN data to an ASCII log file compatible with other CAN tools such as Vector CANalyzer/CANoe and other. Since no official specification exists for the format, it has been reverse- engineered from existing log files. One description of the format can be found here.

.. autoclass:: can.ASCWriter
    :members: