Add timeout and retry to the developer mode probe. After a keep-alive
timeout, paho auto-reconnects but the session can be half-broken: the
printer sends status but ignores commands. The probe had no recovery —
one unanswered probe permanently blocked retries. Now times out after
10s with one retry; two consecutive failures force-close the socket for
a clean reconnect.
Move H2S from the drying-unsupported blocklist to the firmware-gated
list, requiring minimum firmware 01.02.00.00 (released end of March
2026). Both remote AMS drying and queue auto-drying now work on H2S.
Bambuddy can now use an external PostgreSQL database via the
DATABASE_URL environment variable. SQLite remains the default.
Dialect-aware helpers handle upserts, PRAGMAs, FTS (FTS5 vs
tsvector+GIN), backup/restore, and health checks. All migration
blocks use savepoints to prevent Postgres transaction poisoning.
Backups are always portable SQLite format regardless of backend.
Cross-database restore imports SQLite backups into PostgreSQL
with automatic boolean/datetime conversion, NOT NULL default
filling, and FK constraint handling.
REST/Webhook smart plugs can now fetch power and energy data from
individual URLs instead of requiring all values in a single status
response. Each value falls back to the shared Status URL when no
separate URL is set, preserving backward compatibility. Added power
and energy multipliers for unit conversion (e.g. 0.001 for Wh→kWh).
Race condition in _update_state: dev mode probe released GIL via MQTT
publish between raw_data overwrite and vt_tray list restoration, letting
the event loop iterate over raw dict keys (strings) instead of spool
dicts. Affects A1, P1, and X1Plus firmware that don't send the fun field.
Fix: normalize vt_tray dict→list before raw_data assignment, restore
preserved fields before any GIL-releasing work, add defensive guard in
printer_state_to_dict.
Single-nozzle printers (X1C, P1S, A1) report tray_now=254 for external
spool, but BambuStudio sends ams_id=255 (VIRTUAL_TRAY_MAIN_ID) in the
print command's ams_mapping2 field. Bambuddy was passing 254 as-is,
causing firmware to target AMS tray 0 instead of external spool —
resulting in 07FF_8012 "Failed to get AMS mapping table" or prints stuck
at heatbed heating when an AMS is connected but empty.
Map external spool to ams_id=255 for all non-H2D printers. H2D
dual-nozzle printers retain 254 (deputy) / 255 (main) distinction.
When multiple AMS spools match the same type/color criteria, an optional
setting now prefers the spool with the lowest remaining filament. This
helps consume partial spools before starting new ones. Sorting applies
to all matching paths: queue scheduler, print modal, and multi-printer
mapping. Unknown remain values (-1) sort to end.
Admins can now filter the Statistics page by user via a new
stats:filter_by_user permission. A user dropdown appears in the stats
header showing all users plus "No User (System)" for prints without
attribution. The filter applies to all stats widgets, failure analysis,
and CSV/Excel exports. Backend validates the permission on all 4 stats
endpoints, returning 403 if the filter is used without authorization.
Stagger option now available when printing directly to multiple printers,
not just in queue mode. Prints are automatically queued with staggered
start times using group size/interval from Settings. New "Require
plate-clear confirmation" setting lets farm users disable per-printer
plate confirmations so queued prints start automatically on finished
printers.
Also fixes settings API type parsing for require_plate_clear (boolean),
stagger_group_size and stagger_interval_minutes (integer) — without this,
saved values returned as strings would cause the settings toggle to
always show enabled and trigger a permanent save loop.
Printers with no AMS hardware (P1S/P1P with only external spool)
rejected print commands with "Failed to get AMS mapping table"
because use_ams was always sent as true. Now auto-sets use_ams=false
when all filament slots map to external spools or are unmapped.
H2D-series excluded since they use use_ams for nozzle routing.
Auto-off now has a "Keep Enabled" toggle that keeps it active between
prints instead of disabling after each use (one-shot). Useful for HA
accessories like BentoBox filters that should always power off after
prints. Default behavior (one-shot) is unchanged.
The stale connection fix (6ac375a) force-closed the socket to trigger
paho reconnect, but paho's disconnect callback redundantly broadcast
state changes, causing rapid connected/disconnected cycling in the UI.
Now sets a flag before the force-close so _on_disconnect skips the
redundant broadcast. Also relaxed keepalive from 15s to 30s — the
aggressive interval caused spurious disconnects on transient hiccups.
Moved _disconnection_event.set() to the top of _on_disconnect so no
early-return filter can prevent it from unblocking disconnect() callers.
Removed leftover debug payload dump.
The daemon now collects CPU temp, core count, load average, memory/disk
usage, OS info, and system uptime every heartbeat using stdlib-only reads
from /proc and /sys. Stats are sent as a JSON blob in the heartbeat
payload, stored in a new system_stats TEXT column, and displayed in a
new "System" tab in SpoolBuddy Settings with color-coded usage bars.
Assigning or unassigning a spool now broadcasts a spool_assignment_changed
event to all connected WebSocket clients. The frontend handles this event
by invalidating the spool-assignments and slotPresets caches, so other
open tabs update automatically without a page reload.
BambuStudio converts virtual tray IDs (254/255) to -1 in the flat
ams_mapping and relies on ams_mapping2 for external spool routing.
Bambuddy was passing raw 254/255 in the flat array, which H2D firmware
rejects with "Failed to get AMS mapping table".
- Convert external tray IDs to -1 in flat ams_mapping (match BambuStudio)
- Fix ams_mapping2 for external trays: each virtual tray is its own AMS
unit with slot_id 0, not a shared unit differentiated by slot
- Fix main/deputy nozzle ID comment (255=main, 254=deputy per BambuStudio)
- Add 8 unit tests for start_print() mapping construction
External folder scan generated thumbnails for 3mf/stl/gcode files but
skipped image files. Added IMAGE_EXTENSIONS check with
create_image_thumbnail() to the scan loop.
Some printers (e.g. H2D) only send {id, state} in incremental MQTT
tray updates — no tray_type, tray_color, or other fields. When
filament is unloaded (state changes from 11 to 10), the old tray
data persisted indefinitely because the merge logic only updates
fields present in the incoming message.
Backend:
- Detect tray state != 11 without tray_type in incremental updates
and clear stale tray data (bambu_mqtt.py)
- Expose tray `state` field via REST API and WebSocket broadcasts
(printer.py schema, printers.py route, printer_manager.py)
- Include AMS tray content in WebSocket dedup key so load/unload
transitions trigger broadcasts (main.py)
Frontend:
- Add `state` to AMSTray interface (client.ts)
- Show configure/assign buttons for state=10 (spool present, not
loaded) but hide for state=9 (truly empty) on AMS/HT slots
- Hide fill level bar on empty slots
Tests:
- 5 new tests covering state-based clearing, preservation, reload,
and idempotency
When a Bambu Lab spool is detected in the AMS but no tag match exists,
check for an untagged inventory spool with matching material/subtype/color
before creating a new entry. Links the RFID tag to the existing spool
(data_origin="rfid_linked") to prevent duplicate inventory entries.
15 backend unit tests covering keypair management, branch detection,
SSH command execution (success/failure/timeout), and full update flow
with error handling. 4 new frontend tests for the Updates tab (version
display, buttons, SSH setup, update available state).
BambuStudio connects to undocumented proprietary ports 2024-2026
on A1/P1S models during the print flow. The proxy wasn't forwarding
these ports, causing connection refused (RST) and triggering the
access code dialog instead of printing. MQTT and FTP worked fine —
port 2024 was the sole blocker.
Added transparent TCP pass-through proxies for ports 2024-2026,
following the same pattern as the existing FileTransfer (6000) and
RTSP (322) proxies. Silently ignored on models that don't use them.
When targeting a specific printer, the scheduler's power-on-wait loop
created new MQTT clients on each attempt. Each new client re-tried the
request topic subscription, which some brokers (e.g. A1) reject by
disconnecting. This caused a 170s thrash loop leaving the connection
fragile, so the eventual print command silently failed to reach the
printer.
Cache request topic support per serial number at the class level so
new client instances inherit the knowledge and skip the subscription.
When a printer shuts down it sends a final MQTT message with
tray_exist_bits=0 and power_on_flag=false. The tray_exist_bits
clearing code processed this all-zero value, wiping every AMS
slot's filament data. On reconnect, the auto-unlink check saw
empty tray data (no color, no type) and deleted all spool
assignments as "fingerprint mismatch".
Fix: skip tray_exist_bits slot clearing when power_on_flag is
false. Defaults to true when absent for backwards compatibility.
Adds 3 regression tests covering shutdown preservation, genuine
removal still working, and missing power_on_flag fallback.
Replace fixed 30-second debug log collection with an interactive
3-step flow: start logging, reproduce the issue, stop & submit.
Users now control timing instead of racing a countdown.
Backend: split _collect_debug_logs() into POST /start-logging and
POST /stop-logging endpoints; add debug_logs field to submit request.
Frontend: 3-step progress indicator with elapsed timer, pulsing
active state, and 5-minute auto-stop. Updated all 7 locale files.
Add a "Rotate spool during drying" checkbox to the manual drying popover
for AMS 2 Pro and AMS-HT units. The firmware-level rotate_tray field was
already sent (hardcoded to false) — this makes it user-configurable.
The checkbox defaults to unchecked and resets each time the popover opens.
Firmware silently disables rotation if filament is currently loaded.
When all matching printers were busy and a job was queued with ASAP
timing, the scheduler immediately fired a "Job Waiting for Filament"
notification even though the job was just waiting for a printer to
finish — no user action required.
Added _is_busy_only() check to skip the waiting notification when the
only reason is "Busy". Notifications still fire for actionable reasons
(missing filament, offline, wrong color). Also renamed the default
notification template title to "Queue Job Waiting" and updated
descriptions across all 7 locales.
The closed-source bambu_networking DLL validates TLS connection parameters
and rejects connections where the certificate doesn't match the printer's
real BBL CA certificate. The TLS-terminating proxy presented Bambuddy's
own certificate, causing X1C/X1 prints to silently fail after verify_job.
Switch to transparent TCP proxying for FTP, FileTransfer, Camera, and FTP
data — only MQTT remains TLS-terminated (required for IP rewriting). The
slicer now gets end-to-end TLS directly with the printer's real certificate.
Changes:
- SlicerProxyManager uses TCPProxy for FTP (990), FileTransfer (6000),
Camera (322), and pre-listens on FTP data ports (50000-50100)
- Only MQTT (8883) uses TLSProxy for IP rewriting
- Remove debug logging from MQTT and FTP proxy code
- Fix install.sh missing AmbientCapabilities=CAP_NET_BIND_SERVICE
- Update module docstring, migration docs, README proxy description
- Add tests verifying transparent proxy architecture
When the slicer and printer are on different VLANs, Bambu Studio could
not send prints through the proxy because the printer's real IP leaked
through MQTT payloads, the bind protocol forwarded the real printer's
identity, file transfer and camera ports were not proxied, and FTP
data connections raced the TLS handshake on zero-byte uploads.
- Rewrite IP addresses in MQTT PUBLISH payloads (string + integer)
with proper packet framing and cross-chunk buffering
- Respond to bind/detect with VP identity via BindServer
- Add TLS proxies for port 6000 (file transfer) and 322 (RTSP camera)
- Buffer slicer FTP data during printer connection setup
- Advertise configured VP name in SSDP proxy
- Add cross-subnet SSDP wildcard listener for VPN setups
- Register UserEmailPreference model in models/__init__.py
- Add 11 unit tests for MQTT rewrite, IP conversion, SSDP name
When the slicer and printer are on different VLANs, Bambu Studio could
not send prints through the proxy because the printer's real IP leaked
through MQTT payloads, the bind protocol forwarded the real printer's
identity, the port 6000 file transfer tunnel was not proxied, and FTP
data connections raced the TLS handshake on zero-byte uploads.
- Rewrite IP addresses in MQTT PUBLISH payloads (string + integer)
with proper packet framing and cross-chunk buffering
- Respond to bind/detect with VP identity via BindServer
- Add TLS proxy for port 6000 (file transfer tunnel)
- Buffer slicer FTP data during printer connection setup
- Advertise configured VP name in SSDP proxy
- Add cross-subnet SSDP wildcard listener for VPN setups
- Register UserEmailPreference model in models/__init__.py
- Add 11 unit tests for MQTT rewrite, IP conversion, SSDP name
Carbon rods use plain bearings — lubricating them degrades print quality.
Removed the lubrication task from defaults; only "Clean Carbon Rods"
remains. Existing entries are auto-removed on next startup via
ensure_default_types(). Updated wiki link mapping and tests.
Add a speed control badge to the printer monitoring card controls row
that lets users switch between Silent (50%), Standard (100%), Sport
(124%), and Ludicrous (166%) presets during active prints. The badge
displays a gauge icon with the current speed percentage, always visible
but disabled when idle. Includes backend endpoint, optimistic UI
updates, i18n for all 7 locales, and full test coverage.
When running multiple virtual printers with different access codes on
separate bind IPs, FTP connections were always routed to the wrong VP.
Root cause: the iptables REDIRECT rule (990→9990) rewrites the
destination IP to the incoming interface's primary address. With Linux's
weak host model (arp_filter=0), packets for secondary IPs arrive on the
primary interface, and REDIRECT sends them all to the first VP's FTP
server. MQTT was unaffected because port 8883 had no redirect.
Fix: FTP server now binds directly to port 990 (standard implicit FTPS),
eliminating the iptables redirect entirely. Requires CAP_NET_BIND_SERVICE
(already set in the systemd service file and Docker image).
Also removed a global asyncio set_exception_handler() in the MQTT server
that was overwritten by each VP instance, causing spurious "Unhandled
exception in client_connected_cb" errors on startup.
Changes:
- FTP_PORT: 9990 → 990 (ftp_server.py)
- Removed set_exception_handler() from MQTT server
- Updated Dockerfile, docker-compose.yml port mappings
- Deprecated --redirect-990 in install script
- Updated wiki: removed iptables instructions for all platforms
- Added migration guide (docs/migration-vp-ftp-port.md)
- Added unit tests for port constant and no-global-state invariant
X1C and X1 virtual printers used legacy SSDP model codes
(3DPrinter-X1-Carbon, 3DPrinter-X1) that BambuStudio doesn't
recognize, causing "incompatible printer preset" errors when
sending prints. Changed to the correct codes (BL-P001, BL-P002)
that real printers report via SSDP.
Also fixed proxy mode auto-inherit storing printer display names
(e.g. "X1C") instead of SSDP codes, by adding a resolution layer
that maps display names to model codes.
DB migration auto-converts existing VPs on startup.
Add tests, docs, and ruff fixes for per-user email notifications
- Fix missing timezone import in email_service.py (F821)
- Fix unused lambda arg in main.py asyncio done_callback (ARG005)
- Fix E302 blank line spacing for mark_printer_stopped_by_user
- Fix F821/UP037 forward reference in user_email_pref model
- Fix SettingsPage test for duplicate "Notifications" text
- Add backend unit tests for permissions, schemas, and templates
- Add backend integration tests for user-notifications API
- Add frontend tests for NotificationsPage
- Add user_email_pref model import to test conftest
- Update CHANGELOG and README
Webhook providers did not include image data (e.g. camera snapshots
from first layer complete notifications) even though other providers
like Telegram, Pushover, and Discord already attached them. The webhook
payload now includes a base64-encoded "image" field when a snapshot is
available (generic format only, excluded from Slack format).
The Debian ffmpeg package uses GnuTLS, whose hardened defaults reject
TLS renegotiation and legacy ciphers that some Bambu printer firmwares
(notably P2S) rely on — causing RTSP sessions to drop after a few
seconds.
Add a local TLS termination proxy (Python ssl/OpenSSL) that handles
the TLS connection to the printer and exposes a plain RTSP port to
ffmpeg. The proxy rewrites RTSP request-line URLs (rtsp://proxy →
rtsps://printer) while preserving Authorization headers so Digest
auth hashes remain valid.
Also:
- Reduce RTSP reconnect delay from 1.0s to 0.2s
- Add ffmpeg fast-start flags (-probesize 32, -analyzeduration 0,
-fflags nobuffer, -flags low_delay)
- Fix external camera double rate-limiting causing choppy streams
- Apply TLS proxy to external camera rtsps:// URLs and snapshot capture
- Update orphan ffmpeg cleanup to match rtsp:// (proxied) URLs
- Add unit tests for RTSP URL rewriting and proxy lifecycle
Ambient drying: automatically dry filament on idle printers when
humidity exceeds threshold, regardless of queue state. Separate toggle
from queue auto-drying — both can run simultaneously. Uses the same
presets, humidity threshold, and power constraint detection.
Fix: block mode (wait for drying) previously skipped the humidity
auto-stop check for already-drying printers, causing drying to
continue indefinitely. Now only prevents starting new drying.
Queue auto-drying: scheduler automatically starts drying on idle printers
with scheduled queue prints when AMS humidity exceeds the configured
threshold. Uses conservative parameters (lowest temp, longest duration)
for mixed filaments. Drying stops when humidity drops below threshold
(30-minute minimum prevents oscillation), when scheduled items are
removed, or when the feature is disabled. Optional "block queue" mode
delays the next print until drying completes.
Configurable presets: temperature and duration per filament type,
editable in Settings → Print Queue, used by both manual drying popover
and queue auto-drying. Separate presets for AMS 2 Pro (n3f) and AMS-HT
(n3s) reflecting different heating capabilities.
PSU detection: drying button disabled with tooltip when dry_sf_reason
indicates insufficient power. Parses drying status bits and dry_sf_reason
from AMS info hex string via MQTT.
Backend: print_scheduler.py (+316 lines), bambu_mqtt.py, printer_manager,
schemas, settings route. Frontend: PrintersPage drying presets prop,
SettingsPage drying config UI, i18n (7 locales). Tests: 27 new tests in
test_scheduler_auto_drying.py covering conservative params, presets,
state sync, stop logic, minimum drying time, and auto-stop regressions.
Non-script HA entities (switch/light/input_boolean) on the printer card
always sent turn_on when clicked, which is a no-op when the switch is
already on. Now sends toggle for non-script entities so the badge click
actually changes the switch state. Script entities still use turn_on.
Also fix SmartPlugManager._get_plug_for_printer() using
scalar_one_or_none() which crashes with MultipleResultsFound when
multiple plugs are assigned to the same printer (e.g., Tasmota + HA
switch). Now fetches all plugs and returns the main non-script plug.
Add tests for both fixes: _get_plug_for_printer multi-plug handling
(5 tests) and canonicalFilamentType/filamentTypesCompatible/autoMatch
PA-CF equivalence (8 tests).
Notify users when the first layer finishes printing so they can check
adhesion remotely. Triggers once per print when layer 2 begins
(layer_num >= 2, capped at <= 5 to handle reconnects). Includes a
camera snapshot attachment. Adds the on_first_layer_complete toggle
to all notification providers, with backend/frontend/i18n support
across all 7 locales.
Start, monitor, and stop drying sessions for AMS 2 Pro (n3f) and
AMS-HT (n3s) directly from the Printers page. Flame icon in AMS card
header opens a popover with filament-based temperature/duration presets
from BambuStudio. Live countdown status bar shows time remaining.
Backend: cache module_type from MQTT get_version, expose dry_time and
module_type in both WebSocket and REST paths, add supports_drying()
with firmware gating, add server-side guard on start_drying endpoint.
Frontend: drying button, popover with filament select + temp/duration
sliders, status bar, start/stop mutations. i18n for all 7 locales.
Supported: X1/X1C (fw 01.09+), P1P/P1S (fw 01.08+), H2D (fw 01.02.30+),
H2D Pro, X1E. Not supported: P2S, A1, A1 Mini, H2S, H2C.
Sends persistent notifications to the HA dashboard using the existing
HA connection from Settings. Zero config — just select "Home Assistant"
as provider type. Users can forward notifications to mobile via HA
automations.
Three interrelated bugs in AMS info field parsing caused AMS units
to appear on the wrong nozzle on H2D dual-nozzle printers:
1. Info field parsed as decimal instead of hex (BambuStudio uses
std::stoull with base 16)
2. Extruder ID extracted as 1-bit instead of 4-bit field (bits 8-11)
3. Partial MQTT updates replaced the full extruder map instead of
merging into it
maziggy