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3a6cf04a7e
Every slot of the A2L's AMS Lite rendered as "?" in Bambu Studio through the
Virtual Printer while Bambuddy's own AMS card was correct, and a filament set
by hand in Studio reverted about a second later.
The A2L reports its AMS Lite as physical unit id 16 but packs the slot presence
bits at base 24, so bambu_mqtt normalises the id to 6 at the ingest boundary and
every internal reader gets the right bits. The VP bridge is not downstream of
that: BambuMQTTClient._on_message fans raw payload bytes out to raw-message
handlers before parsing, so mqtt_bridge._on_printer_raw does its own json.loads
and still holds id 16. It then called the shared apply_tray_exist_bits, which
computed 16*4 = bits 64-67 -- never set -- concluded all four slots were empty,
and wiped tray_type / tray_color / tray_info_idx / tag_uid / tray_uuid / remain
from the copy sent to the slicer. That runs on every push, which is why a manual
pick could not survive the next 1 Hz cached-as-base report.
apply_tray_exist_bits now folds the unit id through normalize_am_unit_id, so 16
and 6 land on the same bit base whichever id the caller holds. The bridge's
cached ids stay physical on purpose -- Studio addresses the Lite as 16, sending
ams_get_rfid {ams_id: 16} through the VP -- so normalising the cache instead
would have broken the slicer's own command path.
Confirmed from the reporter's debug log, which shows the cleanup clearing slots
at bits 64-67 under the VP's log label. Before #2670 added the
0 <= ams_id <= 15 range guard this wiped the slots; after it, unit 16 fell out
of the guard and the A2L got no empty-slot cleanup at all -- two different wrong
answers, both fixed here.
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