python-can

import can import os # For a runnable example without physical hardware, you can set up a virtual CAN interface: # On Linux, run in terminal: `sudo modprobe vcan && sudo ip link add dev vcan0 type vcan && sudo ip link set vcan0 up` # Then, use channel='vcan0' below. # Configure bus interface and channel (can be set via environment variables or config file too) # Using 'socketcan' with 'vcan0' is a common virtual setup on Linux. # Replace 'socketcan' and 'vcan0' with your actual interface and channel if using real hardware. BUS_INTERFACE = os.environ.get('CAN_INTERFACE', 'socketcan') CAN_CHANNEL = os.environ.get('CAN_CHANNEL', 'vcan0') try: # Using 'with' statement ensures the bus is properly shut down with can.Bus(interface=BUS_INTERFACE, channel=CAN_CHANNEL, receive_own_messages=True) as bus: # Create a CAN message message = can.Message( arbitration_id=0x123, # Standard or extended ID is_extended_id=False, # Set to True for extended IDs data=[0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88], # 0-8 bytes for CAN 2.0, up to 64 for CAN FD is_fd=False, # Set to True for CAN FD messages bitrate_switch=False, # Relevant for CAN FD error_state_indicator=False # Relevant for CAN FD ) print(f"Attempting to send message: {message}") bus.send(message) print(f"Message sent successfully on {bus.channel} using {bus.interface} interface.") # Optional: Receive a message # received_message = bus.recv(10.0) # Wait up to 10 seconds for a message # if received_message: # print(f"Received message: {received_message}") # else: # print("No message received.") except can.CanError as e: print(f"Error sending message: {e}") except Exception as e: print(f"An unexpected error occurred: {e}")