Spool assignment issues

[Leon99]

1. Spool assignment doesn't work
   Assigned a spool via SpoolmanSync UI - no errors but didn't work (the assignment didn't appear in Bambu Studio).
   Assigned a spool via ha_bambulab card - worked as expected.

2. SpoolmanSync doesn't indicate empty trays and allows assigning a spool to any one.

3. When the assigned pool doesn't match the one that was set in the printer, it shows "Possible wrong spool assigned, RFID reports xxx Assigned spool xxx" even though there's no RFID on it.

4. Not sure what Refresh button supposed to do but it doesn't seem to do anything.

[gibz104]

Hey @Leon99, thanks for the detailed report!

Point 1 — Spool assignment doesn't appear in Bambu Studio:

SpoolmanSync doesn't write spool assignments back to the printer or Bambu Studio. It works the other direction. It tracks which Spoolman spool is loaded in each AMS tray so it can automatically deduct filament usage when you print. The assignment is stored in Spoolman (via the extra.active_tray field), not on the printer itself. Bambu Studio has its own separate filament management that SpoolmanSync doesn't interact with.

Point 2 — Empty trays and assigning to any tray:

This is by design. SpoolmanSync lets you assign any spool to any tray because the assignment is on the Spoolman side for usage tracking. It doesn't control what's physically in the printer. You tell SpoolmanSync which spool you put in which tray, and it handles the rest.

Point 3 — "Possible wrong spool" warning on non-RFID spools:

This one is a valid bug, thanks for catching it. The mismatch detection is comparing the color/material that ha-bambulab reports against what's in Spoolman. For Bambu spools with RFID tags, this data comes from the tag and is reliable. But for third-party spools without RFID, the printer just reports whatever you manually configured in Bambu Studio/Handy, and the color you pick there almost certainly won't exactly match the vendor's hex color in Spoolman. The result is a false mismatch warning.

I'll push a fix for this, the mismatch detection will now be skipped for non-RFID spools (detected by checking whether tray_uuid is all zeros, which is what ha-bambulab reports when there's no RFID tag).

Point 4 — Refresh button:

The refresh button re-fetches the current printer and spool data from Home Assistant and Spoolman. If the dashboard already shows the latest state, it won't visibly change anything. It's useful if you've made changes in Spoolman directly and want SpoolmanSync to pick them up without waiting for the next automatic poll.