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Questions tagged [python-can]

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.

References:

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How to use Buffered Reader in python-can?

I have a python script that has 2 thread to perform CAN TX and CAN RX. I'm more concerned about CAN RX. Right now I run bus.recv(timeout=) on my receiver thread. But I feel this is not the smartest way to do it. Going through the documentation, I…
Frost K
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Transmit buffer full

I am executing a python and can code to make a data log but when I run it I get the error Transmit buffer full This is the code #!/usr/bin/python3 # ## obdii_logger.py # # This python3 program sends out OBDII request then logs the reply to the sd…
Fabianh
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Decoding logged CAN .blf file using a .dbc file

I am trying to decode a logged CAN file which is saved in CAN binary logging format (.blf) I tried to use the following piece of code to decode my .blf file, but seem to get key error import cantools import can blf_file = r'path to blf…
Masoom Kumar
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Modify checksum and counter of Periodic CAN message using Python CAN module

I am trying to modify the counter and checksum in can bus which is sending periodic cyclic message. The issue is counter is increasing from lets say 0-4. Can anyone help in updating a periodic message (i.e. update checksum based on counter after…
Nirupam Kapoor
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Python-can filtering mask

I'm trying to filter out CAN bus messages except 0x257 as below It seems like the filter is working because in the beginning I can only see message with ID 0x257 like 0000257 00 A1 00 FF ... but several ten seconds later I start to get other…
deepsdog
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Why CAN FD communication not working with two nodes

I'm trying to communicate with an actuator device via CAN FD connection, with the help of a Raspberry 4b and a Waveshare CAN hat. While they are separated, using a tester I read the correct frames on both devices. But when the Raspberry and the…
Tawhiri
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Logging can data before and after error message changes

I'm looking to develop a program that writes CAN data to an asc file (using the CAN protocol). The file is supposed to contain all data 10 seconds before and 10 seconds after there is a change with the error variable on the bus. To do this, I have…
user21860
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Is there any way to convert .log file generated from BUS master (CAN tool) to .asc file (Vector support) with out bus master?

I am trying to make a script which convert BUS master .log files into .asc files without bus master. The files are just column adjustment but I am stuck with different time format used in the files' format. Example: 11:29:26:2229 (.log) =…
Parth Patel
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Concurrency issue data corruption asyncio python-can locking/queues - nested dictionaries

I am at the end of a very long journey... Here is the long story if you are interested. https://github.com/hardbyte/python-can/issues/1336 Sorry for the incredibly long code snippet but I am not sure where I am going wrong so I thought more is…
Reowald
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Python-can and Vector in docker

Background: Today we have a application that is doing some stuff on a CAN network using a Vector VN1630A dongle. It is working fine as it is on Windows, but the next step for us is to make it run as a Docker image, so we avoid cluttering the host…
EmbeddedNoob
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unable to transmit more than 8bytes in DLC of data in can bus using python

This is my code iam using cantools here ggg contains the converted integer values of hex id of message , dlcs contain the respective dlc value can_bus = can.interface.Bus(channel='0',bitrate=500000, bustype='vector'…
Lakshmi Srikanta
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How to use python-can send a tx message(can message)

import can bus = can.Bus(interface='vector', app_name='CANoe', channel=[0], receive_own_messages=True) message = can.Message(arbitration_id=123,data=[0x11, 0x22, 0x33]) print("send…
lion_li
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How to convert a pcap file to am ASC or BLF file?

I want to convert a pcap file to asc or blf file. I am new to the field and I appreciate your answers. Thanks in advance.
mmdi2001
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Unable to use two python-can interfaces at the same time (ixxat)

I am trying to utilize two ixxat devices via python-can to verify throughput on a gateway module but I can't seem to get two interface devices to connect at the same time. One at a time I can get them to connect and send or receive but I get errors…
monkeyfett8
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Python-can: AttributeError: 'list' object has no attribute 'channel'

I am trying to use bus.send_periodic to send multiple messages with a period of 100ms. However, when I run the code below I get the error: AttributeError: 'list' object has no attribute 'channel' in line 50: task = bus.send_periodic(messages,…
melav
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