Bambu Lab Firmware Update & SimplyPrint: What You Need to Know

Overview

Bambu Lab recently introduced a new Authorization Control System as part of a security firmware update. This update impacts third-party integrations, including SimplyPrint, preventing actions such as starting prints, stopping prints, heating the printer, and sending movement commands.

However, there is no need to panic. We are in active discussions with Bambu Lab, and they are cooperating with us to ensure SimplyPrint remains compatible with Bambu Lab printers.

For more details, you can read Bambu Lab’s official announcements here and related articles:

• Firmware Update: Introducing New Authorization Control System
• Updates and Third-Party Integration with Bambu Connect
• How to enable developer mode (Bambu Lab Wiki)

Current Status

• SimplyPrint still works with Bambu Lab printers, and will continue to always to so.
• If you want to keep using SimplyPrint together with Bambu Handy, you'll have to either stay on an older firmware version (see below for concrete breakdown)
• If you use the SimplyPrint App instead of Bambu Handy, you can use your printer in LAN-only mode together with the new Developer Mode option to stay up to date with your printers firmware
• As of today (June 21th) all Bambu Lab printers now have a firmware version that enables their "Authorization Control System" as well as include an option to enable Developer Mode.
• Firmware downgrades are possible, so there is no permanent lockout risk at this time.
• Developer Mode can be enabled to always allow SimplyPrint to function with the latest firmware when Developer Mode and LAN mode are enabled.
• The X1Plus open-source firmware remains unaffected and will continue working with SimplyPrint as it currently does. You can find more about X1Plus here: X1Plus Open-Source Firmware.

What the New Firmware Changes

The Authorization Control was shipped in the following firmware versions and affects all users not using the new Developer Mode:

• For X1-series printers it was added in firmware version 01.08.03.00
• For A1-series printers it was added in firmware version 01.05.00.00
• For P1-series printers it was added in firmware version 01.08.02.00
• For the H2D printer it was added in firmware version 01.01.00.01

These firmware updates (and newer) prevents you from using SimplyPrint to:

• Starting prints remotely
• Stopping prints remotely
• Sending movement commands
• Heating up your printer

SimplyPrint can still read data from the printer, but without additional permissions, controlling the printer remotely is restricted.

SimplyPrint's Response

We are actively working with Bambu Lab to find a long-term solution. Here’s what we’re doing:

• Direct communication with Bambu Lab’s leadership and development team
• Gaining access to Bambu Lab's official SDKs to explore new integration possibilities
• Working on adapting SimplyPrint to comply with the new authorization system

The implementation of Developer Mode gives us a workable path forward. While this mode may limit certain cloud-based functionalities, SimplyPrint will continue to support Bambu Lab printers via Local mode.

What You Should Do

• If you rely on Bambu Handy or other parts of Bambu Lab Cloud: Stay on an older version of your printers firmware, or consider whether its possible to move workflows over to SimplyPrint; Check out our suggestions page and leave some feedback or on discord to reach out and learn more.
• If you already use your printer in LAN-only mode, or don't need Bambu Lab Cloud: Enable both LAN-only mode and Developer Mode.
• Join the Conversation: Engaging with Bambu Lab on forums and social media (mentioning SimplyPrint) helps reinforce user demand for continued third-party integration.

Final Thoughts

We are confident SimplyPrint will continue to support Bambu Lab printers, thanks to ongoing collaboration with Bambu Lab’s team. There is no immediate risk of losing SimplyPrint functionality, and we will keep you updated on our progress.

Stay tuned for further announcements, and as always, thank you for being part of the SimplyPrint community!

Updated on: 21/06/2025