What are the fastest checks you run when OpenArm stops behaving predictably at the communication layer?
We want a thread focused on OpenArm SocketCAN debugging for builders and integrators.\n\nWhich checks catch the problem fastest: interface state, bitrate, motor ID mapping, timeout tuning, or something else?\n\nIf you reply, include one exact symptom and one exact check that helped.
We have seen teams skip a clean interface check and then chase controller errors that were actually CAN bringup issues. Start lower in the stack than you think.
Motor ID mapping mistakes are more common than library bugs. Write the mapping down and keep it visible during every hardware session.
If you solved this recently, share the exact command or log pattern that told you the fault was communication and not calibration.