Firmware Updates¶

Check and upload firmware updates for printers operating in LAN-only mode.

Overview¶

Bambu Lab printers typically receive firmware updates through Bambu Cloud. For printers operating in LAN-only mode, this feature provides an alternative way to update firmware:

• Check for available firmware updates
• Download firmware from Bambu Lab servers
• Upload directly to printer's SD card via FTP
• Trigger update from printer's touchscreen

Update Notifications¶

Firmware Version Badge¶

Each printer card shows a firmware version badge when firmware checking is enabled:

• Green (with checkmark icon) — firmware is up to date. Click to view release notes for the installed version
• Orange (with download icon) — a firmware update is available. Hover for version info (current → latest). Click to open the firmware update modal
• Badge displays the installed firmware version number (e.g. 01.09.00.00)
• Requires firmware:read permission when authentication is enabled

Automatic Checking¶

Firmware versions are checked automatically:

• On printer connection
• Cached for 5 minutes to reduce API calls
• Compares installed version against Bambu Lab's latest

Disabling Firmware Checks¶

You can disable firmware update checks in Settings → General → Updates:

• Toggle "Check printer firmware" off
• When disabled, no firmware check requests are made to Bambu Lab servers
• Useful for users who prefer to manage firmware manually or have network restrictions
• The update badge will not appear on printer cards when disabled

Updating Firmware¶

Step 1: Open Update Modal¶

Click the orange Update badge on the printer card to open the firmware update modal.

Step 2: Review Version Info¶

The modal shows:

Step 3: Check Prerequisites¶

Before uploading, the system checks:

• SD card is inserted
• Sufficient free space (~400MB recommended)
• Printer is connected

Step 4: Upload Firmware¶

1. Click Upload Firmware
2. Progress bar shows real-time upload status
3. Wait for upload to complete (typically 2-5 minutes for ~300MB)

Step 5: Trigger Update on Printer¶

After upload completes, go to the printer's touchscreen:

1. Navigate to Settings
2. Select Firmware
3. Choose Update from SD card
4. Wait for update to complete (10-20 minutes)

Firmware Cache¶

Downloaded firmware files are cached locally:

• Location: firmware/ directory
• Naming: {MODEL}_{VERSION}.bin
• Reuse: Cached files are reused for subsequent uploads

This speeds up updates when:

• Updating multiple printers of the same model
• Re-uploading after a failed update
• Uploading to a new printer

Supported Printers¶

All Bambu Lab printer models are supported:

Troubleshooting¶

No Update Badge¶

• Printer may already be on latest firmware
• Check printer is connected (online status)
• Firmware check may still be loading

Upload Fails¶

• Ensure SD card is inserted and has space
• Check printer is not currently printing
• Verify network connectivity

Upload Stuck¶

• Large files (300MB+) take several minutes
• Progress shows real bytes transferred
• 10-minute timeout prevents indefinite hangs

Printer Doesn't See Update¶

• Firmware file must be in SD card root
• File must have correct .bin extension
• Try removing and reinserting SD card

FAQ¶