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[OpenArm Troubleshooting] Firmware Version Mismatch After Actuator Update (Intermediate)

One actuator update broke stable motion? Find cross-joint version/schema mismatches before chasing phantom wiring issues.

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A stressful OpenArm maintenance problem appears after updating one actuator or replacing a module: the stack still comes up, but version-dependent features, parameter assumptions, or message formats stop lining up cleanly across joints.

How are you diagnosing firmware version mismatch on OpenArm after an actuator update?

Please share how you inventory versions across the whole arm, which symptoms tell you the problem is truly a version mismatch instead of wiring or config drift, and what recovery order keeps the robot safe while you bring everything back into sync.

If you reply, include one exact symptom after the update and one exact version or compatibility check that exposed the mismatch.

Related troubleshooting path: Motor ID conflicts after actuator replacement · Controller manager switching and safe restart

Module: OpenArm · Audience: builders-integrators · Type: question

Tags: openarm, firmware, version-mismatch, actuator-update

Comment 1

Intermediate context: Our exact symptom was joint 4 entering protective stop with a protocol mismatch warning right after one actuator replacement. Discovery worked, but torque mode for that joint failed immediately.

Comment 2

Intermediate context: The key check was a bus-wide version sweep dumped to a matrix (joint id, bootloader, app fw, param schema). One joint shipped with newer schema, so controller assumptions no longer matched bus messages.

Comment 3

Intermediate context: Recovery that worked: pin all joints to a validated bundle, then run a preflight script that blocks motion if any version tuple is outside the approved set. That prevented repeat incidents during later maintenance.

Comment 4

Intermediate context follow-up: Follow-up question: did you lock a version bundle by joint ID, and what preflight rule now blocks motion when one actuator drifts outside that bundle?

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Quick FAQ

How do I identify a true firmware/schema mismatch quickly?

Dump all joint versions into a matrix and compare against an approved compatibility bundle.

python tools/dump_joint_versions.py --all
python tools/check_version_bundle.py --bundle approved_bundle.json
How do teams avoid repeat incidents?

Add preflight guards that block motion when any version tuple is outside validated sets.

Can I copy these commands as-is?

Use them as a checklist template first. Confirm interface names, fixture IDs, and safety conditions in your own cell before execution.