Beta firmware

Beta builds are pre-release firmware we publish here so the community can help validate fixes and new features before they’re promoted to the stable Firmware page.

Beta firmware - read this first

• Not for production farms. Run beta builds on a test printer or a single FarmLoop unit you can babysit, not on the whole farm.
• Things may regress. Trigger reliability, OTA behaviour, MQTT routing - anything we changed is fair game for unintended side effects.
• Please report what you see. If a beta misbehaves, send us the OTA log + .gcode.3mf under the Technical issue category. Mention the beta version in the subject line.
• You can always roll back. Each beta lists the stable build it diverged from - re-flashing that file from the main Firmware page returns you to a known-good state.

Current betas

The A series, FarmBoard 2 and FarmBoard 3 betas are now stable on the Firmware page.

Bambu H Series - 3.20 beta (rev 7) · FarmBoard 2

Bambu H2S, H2D, H2C

v3.20-beta-rev7 September 2026 · beta

Release notes

• Steadier printer connection.
• Door blocked detection is off by default.
• Emergency reset clears everything.
• The cycle record shows the bending, safety and final close steps.
• Rev 7 is a bench build, not yet tested on hardware.
• Rev 5 (FarmBoard 3): door-open safety fix.
• Web access over your WiFi released.
• Firmware update in the browser.
• Better support logs.
• Live status and log.

Download OTA .bin · FB2

⚡ USB-C flash v3.20-beta-rev7 · FB2USB-C flash (Chrome / Edge only)USB-C flash needs HTTPS

Flashing a beta

The flashing procedure is identical to a stable release - pick the route that fits your setup:

• USB-C flash from your browser - recommended when you have a USB-C cable handy.
• OTA upload from the board’s web page - no cable needed; works from any phone or laptop.

Rolling back

If a beta misbehaves, re-flash the matching stable build from the main Firmware page. Both USB-C and OTA support the round-trip - there’s no special “downgrade” mode.

Reporting issues

Bug reports are what make betas useful. Please open a Technical issue ticket and attach:

1. The FarmBoard log - the Download .txt button on the board’s web page (see Getting logs from the FarmBoard).
2. The .gcode.3mf of any print that triggered the issue.
3. A one-line description of what you expected vs. what happened.

We read every report and reply within one business day.