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With a switch fitted, an AMS is not wired to a nozzle any more. It is plumbed into one of the switch's two inlets and reaches both nozzles through it, so every unit reports its extruder as "not fixed" (0xE) and ams_extruder_map comes back empty on these machines. The printer card had nothing to fall back on but the AMS unit number, so AMS-A was badged R and AMS-B was badged L purely because their unit ids are 0 and 1, a third unit got no badge at all, and every one of those labels was wrong. The SpoolBuddy assign modal had the same fallback in a worse form, mapping anything that was not extruder 1 to R. The binding turned out to need no new telemetry. BambuStudio reads it out of bits 24-27 of the same AMS info string we already parse for the AMS type and the extruder id -- 0 is In-B, 1 is In-A -- and it is only meaningful when a switch is installed, because without one 0xE really does mean an uninitialised unit and those bits carry nothing. That gates the read, which in turn forced the switch block to be parsed before the AMS block: _handle_ams_data runs early in _process_message and _update_state only much later, so the binding was lost on every frame that carried both. _parse_fila_switch is split out and called first, and left in _update_state as well so that stays a complete absorb step. The badge keeps L and R rather than A and B, because the lettering is familiar and matches the physical layout. It is a different colour from the plain nozzle badge, and its tooltip names the inlet in full, since the letter is the inlet's position and not a claim about which nozzle that AMS feeds -- the switch can route either inlet to either outlet. An AMS still reporting a real extruder id keeps its ordinary badge, which BambuStudio also treats as authoritative over any switch binding, and a switch that has been fitted but not yet set up on the printer shows nothing rather than a guess. The print dialog's slot dropdown gets the same label. It replaces a left/right hint that never once rendered: ftsExtruderForSlot compared snow-encoded in[] values against global tray ids and could not match. Decoding it correctly would not have saved it -- the firmware reports which slot sits in each inlet and which nozzle each outlet feeds, but never which inlet is currently paired with which outlet, so no per-slot nozzle can be derived. That function is gone rather than fixed. The dialog also points out when every filament a print needs sits behind one inlet. Bambu's own guidance is that this is legal but slow: a change between two filaments on the same inlet retracts the outgoing spool all the way back to its AMS before the next can be fed up the shared tube, where a change across the two inlets only retracts as far as the switch. All on one inlet means every change in the job takes the slow path, and moving a single spool fixes it. So it advises, it does not block. Both views update live. Two things were stopping that. fila_switch and ams_switch_inlet were absent from printer_state_to_dict, and the frontend shallow-merges each WebSocket push over its cached status, so a field the push omits keeps whatever the last full fetch left behind. And the broadcast dedup key had no term for either, so "Join IN-B" on the printer screen moved nothing: the binding is not in the tray component of that key, and it is not in the AMS change-hash either, which covers tray fields only and must stay that way because it drives Spoolman sync. Assigning an AMS to an inlet remains printer-side. BambuStudio can read the binding and has no command to write it -- its switch class is parse and getters only, and the recommended-arrangement popup draws and publishes nothing -- so there is no wire format for us to copy. Adding the two fields to PrinterState broke four test modules whose SimpleNamespace stubs predate them. The stubs are fixed rather than the production reads made defensive: the real dataclass always carries both, and a getattr in the dedup key would silently stop tracking the field if it were ever renamed.
Bambuddy
Your printers. No cloud. Your rules.
Self-hosted command center for Bambu Lab — from one A1 to an entire print farm.
Backed by
🎮 Try the Live Demo • Features • Screenshots • Quick Start • Documentation • Discord • Contributing
Spin up your own private Bambuddy in ~10 seconds — no install, no signup, 30-minute session.
📰 As Featured In
"Bambuddy is the companion app that Bambu Lab should have built from day one." — Adam Conway, XDA-Developers
Two leading 3D-printing publications independently concluded that Bambuddy's feature set already exceeds Bambu's own cloud:
"The features seem to exceed those provided by Bambu Lab's own cloud." — Fabbaloo
"The list of functions seems so extensive that it even goes beyond what Bambu Lab offers in its own cloud." — 3Druck.com
🌐 NEW: Remote Printing with Proxy Mode
Print from anywhere in the world — Bambuddy's new Proxy Mode acts as a secure relay between your slicer and printer:
- 🔒 End-to-end TLS encryption — FTP, file transfer, and camera are transparently proxied with the printer's real TLS certificate
- 🛡️ Optional Tailscale integration — per-VP toggle + Docker socket mount surface the host's Tailscale IP on the VP card, so you know which
100.x.x.xto paste into the slicer when you want a virtual printer reachable over your tailnet (setup). Bambuddy's self-signed CA import is still required on the slicer side: Bambu Studio / OrcaSlicer validate printer TLS against a bundled BBL CA (not the system trust store), and their Add Printer dialog is IP-only (no hostname to match an LE cert against), so a publicly-trusted cert can't help on either dimension. Tailscale's role is the private tunnel (reachability from anywhere, no port forwarding), not cert-import elimination. - 🌍 No cloud dependency — Direct connection through your own Bambuddy server
- 🔑 Uses printer's access code — No additional credentials needed
- ⚡ Full-speed printing — Transparent TCP proxy, only MQTT is decrypted for IP rewriting
Perfect for remote print farms, traveling makers, or accessing your home printer from work.
🍰 NEW: Integrated Slicing — Slice & Print, All In One Place
No desktop slicer required. Drop an STL or 3MF into Bambuddy's File Manager, hit Slice, and the result lands as a ready-to-print .gcode.3mf in the same folder — without ever opening Bambu Studio or Orca Slicer.
- 🍰 One-click slicing — Slice from any browser. The job runs server-side in a tiny sidecar container, progress streams back as a toast, and the sliced file appears in your library when it's done.
- 📱 Slice from your phone or tablet — Bambuddy's PWA + the new server-side slicer means you can drop an STL in from mobile and queue a print without ever touching a desktop.
- 🎒 Bring your own profiles — Import a
Printer Preset Bundle(.bbscfg) exported from Bambu Studio: pick a curated printer + process + filament triplet from a dropdown in the Slice dialog, no more juggling JSON files. - 🔄 Re-slice for a different printer in one click — Open any sliced archive in Bambuddy and re-slice it for any printer, including across the single-nozzle ↔ dual-nozzle (H2D / H2D Pro) boundary that BambuStudio's CLI would normally reject. Bambuddy detects the class change and auto-arranges objects laid out for the source bed (e.g. X1C 256×256) so they land safely on the target (e.g. H2D 350×320 with its per-nozzle dead zones).
- 🍱 Slice all plates at once — Multi-plate projects (parted statues, multi-part kits) get a "Slice all N plates" toggle in the Slice dialog. One click produces a single
.gcode.3mfcontaining every plate's gcode, ready for the printer. The toast shows "Plate 2 of 5 — Generating G-code (47%)" as the loop runs. - 🔁 Same dispatch as the rest of Bambuddy — The sliced output flows into the existing queue / plate-picker / AMS-mapping path, so all the regular conveniences (multi-printer dispatch, AMS routing, scheduled prints) just work.
Optional but recommended — drop the slicer-api/ Compose stack next to your Bambuddy install and the Slice button lights up everywhere.
🧩 NEW: Slicer Pipelines — Save a Recipe, Reuse in One Click
Stop re-picking the same printer + process + filament + bed-type combination every slice. Save a Slicer Pipeline once from the Slice dialog, then apply the whole bundle to any file with a single click — from File Manager, Archives, or MakerWorld imports.
- 🧩 One-click reuse — A pipeline captures the entire Slice modal selection (printer + process + per-AMS-slot filaments + bed type) and surfaces as Run with pipeline → <name> on every sliceable row.
- 🎯 Specific printer or printer class — Pin a pipeline to one printer, or to a class (e.g. any X1C) and let the queue scheduler pick the first available match. Identical-fleet farms get a single recipe instead of one-per-printer.
- 🪢 Multi-copy fanout — Slice once, dispatch up to N copies. With class targeting the copies fan out across the matching printers in parallel — Spread (fastest wall-clock), Single printer (minimise colour-change overhead), or First N (one to each).
- 📊 Runs dashboard — A new Pipelines tab on the Print Queue page lists every run with colour-coded status badges (queued / slicing / dispatching / in-progress / completed / partial-failure / failed / cancelled), per-copy detail on expand, filter dropdowns (Pipeline / Status / Target), and a Retry failed button that re-runs only the copies that didn't complete — successful copies are never re-printed.
- 🔒 Permission-gated — Three permissions (
pipelines:read/pipelines:write/pipelines:run) let you split authoring the recipe from spending filament with it.
Why Bambuddy?
- Own your data — All print history stored locally, no cloud dependency
- Works offline — Uses Developer Mode for direct printer control via local network
- Full automation — Schedule prints, auto power-off, get notified when done
- Multi-printer support — Manage your entire print farm from one interface
✨ Features
📦 Print Archive
📊 Monitoring & Control
⏰ Scheduling & Automation
📁 File Manager (Library)
🌍 MakerWorld Integration
📁 Projects
|
🔔 Notifications
🧵 Spool Inventory
🔧 Integrations
🖨️ Virtual Printer & Remote Printing
🛠️ Maintenance & Support
🔒 Optional Authentication
|
Plus: Configurable slicer (Bambu Studio / OrcaSlicer) • Customizable themes (style, background, accent) • Mobile responsive • Keyboard shortcuts • Multi-language (EN/DE/JA/IT) • Auto updates • Database backup/restore • System info dashboard
🎬 Demo
Spin up your own private Bambuddy with simulated printers and pre-loaded print history. Click around freely — it's your sandbox. ~10 seconds to spawn, 30-minute session, no signup.
Prefer a video walkthrough?
Click to watch the demo on YouTube
📸 Screenshots
Refreshed printer card in 1.2.5b2 — tighter layout, popovers for all controls (temperature setpoints, fan speeds, jog), and a bottom-aligned power row. The screenshots below predate the refresh.
Click to expand screenshots
Real-time printer monitoring with AMS status
Print archive with 3D preview and project assignment
Re-print with AMS filament mapping preview
Built-in timelapse editor with trim, speed, and music
Group related prints into projects
Project detail view with assigned archives
Project timeline and print history
Print scheduling and queue management
Schedule prints for specific date and time
Customizable statistics dashboard
Maintenance tracking per printer
Configure maintenance types and intervals
Bambu Cloud filament profiles
Edit filament preset settings
Pressure advance (K-factor) profiles
Edit K-factor profile settings
General configuration and integrations
Smart plug control and energy monitoring
Multi-provider notification system
API keys and webhook endpoints
Virtual printer configuration
Virtual printer appears in Bambu Studio/Orca Slicer
MQTT debug logging for troubleshooting
Quick power plug control in sidebar
🚀 Quick Start
Requirements
- Python 3.10+ (3.11/3.12 recommended)
- Bambu Lab printer with Developer Mode enabled (see below)
- "Store sent files on external storage" enabled in Bambu Studio/OrcaSlicer
- Same local network as printer
Installation
Windows (Native Installer)
Self-contained .exe — no Python, Node, Docker, or Git required on the target machine. The installer bundles Python 3.13, the React frontend, ffmpeg, and registers Bambuddy as a Windows service.
Download the latest installer:
https://github.com/maziggy/bambuddy/releases/latest/download/bambuddy-windows-x64-setup.exe
Run it (one-time UAC prompt — admin install) → Bambuddy starts as a Windows service and the dashboard opens at http://localhost:8000 automatically. Data lives at C:\ProgramData\Bambuddy\, install at C:\Program Files\Bambuddy\. To update, just run a newer installer over the existing install — your database and archives are preserved.
SmartScreen warning: until our SignPath OSS code-signing approval lands, you'll see "Windows protected your PC" on first run. Click More info → Run anyway.
See the Windows Installer Guide for service management, logs, and troubleshooting.
Docker (Linux / macOS / Windows via Docker Desktop)
Option A: Pre-built image (fastest)
mkdir bambuddy && cd bambuddy
curl -O https://raw.githubusercontent.com/maziggy/bambuddy/main/docker-compose.yml
docker compose up -d
Option B: Build from source
git clone https://github.com/maziggy/bambuddy.git
cd bambuddy
docker compose up -d --build
Open http://localhost:8000 in your browser.
Multi-architecture support: Pre-built images are available for
linux/amd64andlinux/arm64(Raspberry Pi 4/5).
macOS/Windows users: Docker Desktop doesn't support
network_mode: host. Edit docker-compose.yml: comment outnetwork_mode: hostand uncomment theports:section. Printer discovery won't work - add printers manually by IP.
Linux users: If you get "permission denied" errors, either prefix commands with
sudo(e.g.,sudo docker compose up -d) or add your user to the docker group.
Docker Configuration & Commands
Environment Variables:
| Variable | Default | Description |
|---|---|---|
TZ |
UTC |
Your timezone (e.g., America/New_York, Europe/Berlin) |
PORT |
8000 |
Port BamBuddy runs on (with host networking mode) |
DEBUG |
false |
Enable debug logging |
LOG_LEVEL |
INFO |
Log level: DEBUG, INFO, WARNING, ERROR |
Data Persistence:
| Volume | Purpose |
|---|---|
bambuddy.db |
SQLite database with all your print data (not used with PostgreSQL) |
archive/ |
Archived 3MF files and thumbnails |
logs/ |
Application logs |
Updating:
# Pre-built image: just pull the latest
docker compose pull && docker compose up -d
# From source: rebuild after pulling changes
cd bambuddy && git pull && docker compose up -d --build
Daily Beta Builds:
Beta builds with the latest fixes are pushed regularly to the same beta version tag:
# Pull the current beta
docker pull ghcr.io/maziggy/bambuddy:0.2.2b1
# or from Docker Hub
docker pull maziggy/bambuddy:0.2.2b1
Use Watchtower to automatically update when new daily builds are pushed.
Note: Beta builds use version tags like
0.2.2b1— they are never tagged aslatest. Your stable installation won't auto-update to a beta unless you explicitly pull a beta tag.
Useful Commands:
# View logs
docker compose logs -f
# Stop/Start
docker compose down
docker compose up -d
# Shell access
docker compose exec bambuddy /bin/bash
Custom Port:
ports:
- "3000:8000" # Access on port 3000
Reverse Proxy (Nginx):
server {
listen 443 ssl http2;
server_name bambuddy.yourdomain.com;
ssl_certificate /path/to/cert.pem;
ssl_certificate_key /path/to/key.pem;
location / {
proxy_pass http://localhost:8000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_read_timeout 86400;
}
}
Note: WebSocket support is required for real-time printer updates.
Network Mode Host (required for printer discovery and camera streaming):
services:
bambuddy:
build: .
network_mode: host
Note: Docker's default bridge networking cannot receive SSDP multicast packets for automatic printer discovery. When using
network_mode: host, Bambuddy auto-detects your network subnet and can discover printers via subnet scanning in the Add Printer dialog.
Manual Installation (Linux/macOS)
# Clone and setup
git clone https://github.com/maziggy/bambuddy.git
cd bambuddy
python3 -m venv venv
source venv/bin/activate
pip install -r requirements.txt
# Run (--loop asyncio avoids a uvloop TLS bug that can truncate VP FTP uploads)
uvicorn backend.app.main:app --host 0.0.0.0 --port 8000 --loop asyncio
Open http://localhost:8000 and add your printer!
Need detailed instructions? See the Installation Guide
Windows Native Installation
Windows PowerShell (run as Administrator — the installer self-elevates via UAC if not):
powershell -ExecutionPolicy Bypass -Command "iwr -useb https://raw.githubusercontent.com/maziggy/bambuddy/main/install/windows-installer.ps1 -OutFile windows-installer.ps1; .\windows-installer.ps1"
Installs Bambuddy natively on Windows using Git, Python, a virtual environment, separate data/log directories, and optional NSSM Windows Service registration. See the Windows Installer Guide for parameters and unattended-install options.
Enabling Developer Mode
Developer Mode allows third-party software like Bambuddy to control your printer over the local network.
- On printer: Settings → Network → LAN Only Mode → Enable
- Enable Developer Mode (appears after LAN Only Mode is enabled)
- Note the Access Code displayed
- Find IP address in network settings
- Find Serial Number in device info
Note: Developer Mode disables cloud features but provides full local control. Standard LAN Mode (without Developer Mode) only allows read-only monitoring.
Slicer Settings
In Bambu Studio or OrcaSlicer, enable "Store sent files on external storage" so that print files (3MF) are saved to the printer's SD card. Bambuddy needs these files to extract thumbnails and 3D model previews.
- Open Bambu Studio or OrcaSlicer
- Go to the Device tab for your printer
- In Print Options, enable Store Sent Files on External Storage
📚 Documentation
Full documentation available at wiki.bambuddy.cool:
- Installation — All installation methods
- Getting Started — First printer setup
- Features — Detailed feature guides
- Troubleshooting — Common issues & solutions
- API Reference — REST API documentation
🖨️ Supported Printers
| Series | Models |
|---|---|
| X1 | X1, X1 Carbon, X1E |
| X2 | X2D |
| H2 | H2D, H2D Pro, H2C, H2S |
| P1 | P1P, P1S |
| P2 | P2S |
| A1 | A1, A1 Mini |
| A2 | A2L |
🛠️ Tech Stack
| Component | Technology |
|---|---|
| Backend | Python, FastAPI, SQLAlchemy |
| Frontend | React, TypeScript, Tailwind CSS |
| Database | SQLite (default) or PostgreSQL |
| 3D Viewer | Three.js |
| Communication | MQTT (TLS), FTPS |
🤝 Contributing
Contributions welcome! Ways to help:
- 📝 Document — Improve the wiki and guides (urgently needed!)
- Test — Report issues with your printer model
- Translate — Add new languages
- Code — Submit PRs for bugs or features
- 🔒 Security review — (specifically wanted, see below)
Not sure where to start? Reach out on Discord or email martin@bambuddy.cool — I'll help you find something that fits.
🔒 Looking for a security-focused contributor
I'm bringing on a contributor whose specific focus is keeping an eye on Bambuddy's security.
Concretely:
Track the dev branch and flag changes touching auth, permissions, token handling, or the CI security backstops. Async post-merge — no gating of in-flight PRs.
What matters more than formal qualifications: fail-closed thinking by default, comfortable reading the auth layer (FastAPI + SQLAlchemy on the backend, a small React surface), willing to push back on except Exception shapes in security-sensitive code.
No fixed time commitment. If you're interested — or know someone who fits — email martin@bambuddy.cool or DM on Discord.
See CONTRIBUTING.md for guidelines.
📄 License
AGPL-3.0 License — see LICENSE for details.
🙏 Acknowledgments
- SpoolEase by yanshay — early inspiration for NFC-based spool tracking and AMS inventory concepts
- Bambu Lab for amazing printers
- The reverse engineering community for protocol documentation
- All testers and contributors
💖 Support Bambuddy
Bambuddy stays independent because real people support it directly. If Bambuddy makes your printers more useful, please consider:
- GitHub Sponsors — five recurring tiers from $5/mo (Backer) to $300/mo (Corporate). Supporter+ ($15/mo) get access to a private sponsors space with a monthly newsletter and early release notes. Patron+ ($35/mo) vote on the quarterly roadmap. Sustaining Sponsor+ ($150/mo) get a direct async email line for technical questions (~2-3 business days). Corporate ($300/mo) get priority email response (next business day), README header logo, sitewide footer logo on bambuddy.cool, and Press page placement.
- Ko-fi — one-time tip or recurring.
Sponsors get listed in BACKERS.md. Need commercial support (SLA, multi-printer consulting)? Email martin@bambuddy.cool.
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