How to recover from a failed smart device firmware update

This article should internally link to device-level firmware pages and prevent duplicate generic advice across categories.

1. Do not interrupt power unless the vendor specifically instructs you to do so.
2. Confirm app version, device connectivity and available retry path.
3. Restart only the app first if the device may still be finishing background tasks.
4. Then restart the device or hub if progress is clearly stuck.
5. Re-run the update only on stable power and signal conditions.

Best linked from firmware update failed pages in lights, cameras, hubs and locks.