The alert compares against ams_temp_fair, the same threshold that colours
the printer card, which defaults to 35C. Drying deliberately runs at 45C
for PLA, 65C for PETG and up to 85C on an AMS-HT, and the alert repeats
once an hour for as long as the condition holds, so a twelve-hour dry
sent twelve notifications about a temperature the user chose. It then
kept sending them while the unit cooled back down, which is the half the
reporter confirmed on an AMS 2 Pro and an H2C.
Dispatch now consults the drying state the firmware already reports.
dry_time alone is not enough: it reads 0 through the cooling phase that
closes a cycle, so dry_status -- info bits 4-7, already parsed for the
drying-complete edge -- carries the rest. That constant moves out of
bambu_mqtt into a leaf util rather than being duplicated; drying_preflight
would have been the natural home, but it imports printer_manager, which
imports bambu_mqtt, and bambu_mqtt is one of the callers.
The cool-down afterwards is held by a latch released as soon as the unit
reads back at or below the threshold, rather than after a fixed delay, so
a 65C cycle in a cold basement and a 45C one in a warm room each get the
time they actually need. A two-hour cap bounds the one case the latch
cannot resolve on its own -- a unit that never returns below the
threshold -- and since such a unit would have been alarming with no
drying involved, releasing there restores the ordinary behaviour instead
of inventing a new alert.
Two exclusions are deliberate. Humidity is untouched, because during
drying that reading falling is the whole point. And dry_status 6,
HeatOutOfControl, is kept out of the active set: an AMS that has lost
thermal control is exactly when the alert should still arrive, so it must
never read as expected heat.
A cycle plus its cool-down outlasts a restart, so the latch is a settings
row rather than a dict beside _ams_alarm_cooldown -- the internal
timestamp-row pattern support.py already uses. It is read once per pass
and written back only when a unit changed it. Stamps ahead of now are
clamped on read, since a box whose clock jumps backwards writes them and
suppression is measured as now minus the stamp; without the clamp the cap
would measure from a moment that has not happened yet and hold the alert
quiet for the skew on top of it.
No new setting. The reporter was offered the opt-out checkbox they asked
for and said they would not want it if the alert simply never fired
during drying.
The hourly AMS sensor recorder dispatched humidity and temperature alarms
for every unit above threshold without checking whether the unit was
actually loaded. Empty AMS units still report ambient readings, so users
with one loaded + one empty AMS got useful alarms for the loaded one and
hourly noise for the empty one. Disabling the whole alarm category killed
both — not a real choice.
New _ams_has_filament helper inspects tray_exist_bits (hex bitmap, "0" =
empty) with fallback to the tray array's tray_type strings for shapes
where the bitmap is missing. The recorder gates the alarm dispatch on
this check per-AMS-unit, so a multi-AMS printer with one loaded + one
empty still alarms on the loaded one.
Sensor history still records regardless of the gate so the System page
humidity charts stay continuous — only the outbound notification is
suppressed. 9 unit tests cover the bitmap-zero case, bitmap-missing
fallback, garbage/blank/int bitmap edges, and defensive malformed tray.
M2ABRAMSTANK