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The three ways a Bambu printer can connect
Cloud (default)
The printer is bound to your Bambu account. Bambu Studio and Handy send jobs through Bambu's servers, and Handy works from anywhere. Since Bambu's January 2025 authorization change, third-party tools can't control printers in this mode.
LAN-only mode
The printer stops talking to the cloud. Bambu Studio can still find it on the same network with the access code. On X1-series printers, LAN printing needs a microSD card in the printer (Bambu wiki).
LAN-only + Developer Mode
A per-printer switch added with the authorization change. It lets local apps actually drive the printer: start prints, set temperatures, move axes. This is what Bambuddy, SimplyPrint (for full control) and AutoFarm3D ask for.
Sources: Bambu Lab blog: authorization control · Bambu Lab wiki: LAN mode · Bambu Lab wiki: Developer Mode · SimplyPrint help: LAN-only + Developer Mode
What you give up, and what you gain
You lose
- Bambu Handy remote printing and monitoring (XDA, Printer Hub)
- Cloud printing from Bambu Studio
- Over-the-air firmware updates
- Bambu support for your integration: Bambu calls Developer Mode unsupported (All3DP)
You gain
- Full local MQTT, FTP and camera access for farm software
- Printing keeps going when the internet or Bambu's cloud is down
- Files and camera feeds stay on your network
- A choice of farm tools, many free
Reports differ: one Reddit user found Handy still showed the camera after enabling Developer Mode, while XDA and others say you lose Handy. A long-running Bambu Studio GitHub issue calls LAN-only mode hard to use day to day. Test on one printer before you switch the whole farm.
Sources: XDA: Bambuddy · Printer Hub: Bambu firmware guide · All3DP: LAN Only Mode explained · Bambu Studio GitHub issue #4512 (LAN-only usability)
Does Developer Mode void the warranty?
Bambu Lab's head of PR, Nadia Yaakoubi, told All3DP that using Developer Mode will not affect warranties, but that Bambu will be "unable to provide support for setting up MQTT or other integrations". Some forum posts still claim the opposite, and warranty rights also depend on your country's consumer law. Our suggestion: save that article, read the risk notice Bambu shows when you enable the mode, and keep a printer you can return to cloud mode if support asks.
Sources: All3DP: Bambu Lab on Developer Mode (warranty quote) · Bambu Lab wiki: Developer Mode
Firmware updates without the cloud
- Download the firmware package for your model from Bambu Lab's site on a computer.
- Copy it, unchanged, to the root of a microSD card (or USB stick on models that take one).
- Insert it and choose the offline / SD-card update under Settings > Firmware on the printer.
- Re-check your farm tool after the update: Bambu firmware changes have broken third-party tools before.
Bambu's wiki documents the SD-card method; SimplyPrint's help centre has a step-by-step for LAN-only printers. On a farm, update one printer first and run a test job before rolling out.
Sources: Bambu Lab wiki: update firmware from SD card · SimplyPrint help: firmware in LAN-only mode
Which farm tools need which mode
| Software | Mode the printer needs | Runs where |
|---|---|---|
| Bambu Farm Manager | No (unbind from Handy; LAN-only mode off) source source | Local: Windows server + client on your LAN; no cloud for jobs |
| Bambuddy | Yes: LAN-only + Developer Mode source | Self-hosted on your network (Docker); no cloud |
| SimplyPrint | For full control: LAN-only + Developer Mode, via its local client source source | Cloud (browser + apps); a local client connects Bambu printers |
| Printago | Fuse bridge on your network for LAN Developer Mode printers source | Cloud, with the Fuse bridge on your network; a Self-Hosted edition is listed |
| AutoFarm3D | Yes: Developer Mode source | Local hub on your network, managed from a web app |
| FDM Monster | Bambu Lab LAN mode source | Self-hosted, on your network or your own server |
| Bambu Studio + Handy | No: cloud account; can't manage LAN-only printers source | Bambu Cloud account; Studio on Windows/macOS/Linux, Handy on phones |
| Filafleetours · beta | Printers on your local network; no cloud account source | Local box: Raspberry Pi 5, mini PC, NAS (Docker) or Mac; no cloud account; works offline |
Swipe the table sideways to see every column.
Bambu Farm Manager pairs differently: the guide we found (citing Bambu's 3.0 release notes) says to unbind the printer from Handy so it shows Logged Out, and to leave LAN-only mode off. Bambu's farm FAQ says printers connected to Farm Manager then only work on your LAN. Details per tool: Bambu Lab print farm software.
A sensible switch-over plan for a farm
Pick the tool first
Farm Manager (Windows, no Developer Mode), Bambuddy (Docker, Developer Mode) or a paid platform. The tool decides the mode.
Write down access codes and IPs
Give printers fixed IP addresses on your router so the farm tool finds them after a reboot.
Switch one printer
Run a week of real jobs, including a firmware update from SD card, before you move the rest.
Plan remote access
Without Handy, use a VPN to reach your farm tool from outside, or accept local-only control.
Comparing local tools? See self-hosted print farm software. Filafleet (ours, in beta) also runs Bambu printers on your local network with no cloud account: filafleet.app.
LAN-only and Developer Mode questions
Does Bambu Lab Developer Mode void the warranty?
Bambu Lab's head of PR told All3DP that using Developer Mode will not affect warranties, but that Bambu can't support setting up MQTT or other integrations. Some forum users still worry about it, and consumer law differs by country, so keep a copy of that statement and read the risk notice on Bambu's wiki before you switch.
What do you lose in LAN-only mode with Developer Mode?
Cloud features: Bambu Handy remote printing and monitoring, and cloud printing from Bambu Studio. In return, local tools get full MQTT, FTP and camera access. Reports differ on whether Handy still shows anything, so plan as if you lose it.
How do you update firmware in LAN-only mode?
Download the firmware package from Bambu Lab and install it from a microSD card (or USB stick on newer models) using the printer's offline update option. Bambu's wiki documents the SD-card method for printers that can't reach the cloud.
Does Bambu Farm Manager need Developer Mode?
No, according to a self-hosting guide that cites Bambu's Farm Manager 3.0 release notes: you unbind the printer from Bambu Handy so it shows Logged Out and leave LAN-only mode off. Printers paired with Farm Manager then work only on your local network (Bambu's farm FAQ).
Can I run a Bambu print farm with no internet at all?
Mostly yes. Farm Manager, Bambuddy and other local tools keep monitoring and printing over your own network. You lose phone push alerts and remote access from outside unless you add a VPN, and firmware updates arrive on an SD card instead of over the air.