Reserve caseProbeginnerCAN bitrate
Every CAN frame is an error
Restore bus communication without changing node IDs or CANopen objects.
Pairs with Serial and CAN fundamentals in Hardware Integration & CANopen. Read the concept first, then diagnose it here.
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The interface enters error passive immediately and decodes no valid frames.
Ubuntu 24.04, ROS 2 Jazzy, SocketCAN vcan, CANopen drive simulator, ros2_control
System boundary
Trace only the relevant path.
CAN controller timingphysical bus bitsCAN frame decoder
How this lab works
You diagnose it — no command list.
Open the repair workspace and gather your own evidence in a real terminal. No diagnostic commands are handed to you — finding the fault is the exercise. Stuck? Progressive hints unlock inside the workspace.
Verification
Your repair must pass more than the visible symptom.
- CAN interface stays error active
- Heartbeat frames decode
- Hidden regression behavior
- Root cause explanation