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E6 — RFID_SOLVE_GROUP_MISSING

A card was scanned and a solve was ready to submit, but the device has no solve group assigned.

What happens​

When the server sends back card info and the solve is in the Finished state, the firmware checks that a solve group is set in the device state. If it is None, this error is logged once (per boot) and the solve submission is silently skipped. The RFID scanning loop continues running — the device can still scan cards, but this particular solve is lost.

This is an unexpected edge case that should not occur under normal circumstances.

Possible causes​

  • The device connected to the server before its station assignment was fully loaded into its state. This can happen if the server sends card data immediately after connection before the solve group has been synchronised.
  • The device's station assignment was removed in the FKMTime web interface while it was running.

How to fix​

  1. Verify station assignment — In the FKMTime web interface, go to Devices and confirm this device is assigned to a station.
  2. Reboot the device — A fresh connection to the server will resynchronise the solve group.
  3. Contact support — If this error appears during normal competition operation, open an issue on GitHub and attach the micro-connector logs.