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Bambu Lab RFID Tag Documentation

This contains documentation for the known and unknown data that is contained in each block on the RFID tags for Bambu Lab spools.

Block Overview

Summary of what kind of data is stored in each block. Detailed info for each block is documented below.

sec blk Data
0 0 Block 0 UID and Tag Manufacturer Data
0 1 Block 1 Tray Info Index
0 2 Block 2 Filament Type
0 3 Block 3 MIFARE encryption keys, Unrelated to Bambu Lab
1 0 Block 4 Detailed Filament Type
1 1 Block 5 Spool Weight, Color Code, Filament Diameter
1 2 Block 6 Temperatures and Drying Info
1 3 Block 7 MIFARE encryption keys, Unrelated to Bambu Lab
2 0 Block 8 X Cam Info, Nozzle Diameter
2 1 Block 9 Tray UID
2 2 Block 10 Spool Width
2 3 Block 11 MIFARE encryption keys, Unrelated to Bambu Lab
3 0 Block 12 Production Date/Time
3 1 Block 13 Short Production Date/Time
3 2 Block 14 Filament Length
3 3 Block 15 MIFARE encryption keys, Unrelated to Bambu Lab
4 0 Block 16 Extra Color Info
4 1 Block 17 Unknown
4 2 Empty
4 3 Block 19 MIFARE encryption keys, Unrelated to Bambu Lab
5 0 Empty
5 1 Empty
5 2 Empty
5 3 Block 23 MIFARE encryption keys, Unrelated to Bambu Lab
6 0 Empty
6 1 Empty
6 2 Empty
6 3 Block 27 MIFARE encryption keys, Unrelated to Bambu Lab
7 0 Empty
7 1 Empty
7 2 Empty
7 3 Block 31 MIFARE encryption keys, Unrelated to Bambu Lab
8 0 Empty
8 1 Empty
8 2 Empty
8 3 Block 35 MIFARE encryption keys, Unrelated to Bambu Lab
9 0 Empty
9 1 Empty
9 2 Empty
9 3 Block 39 MIFARE encryption keys, Unrelated to Bambu Lab
10-15 * RSA-2048 Signature

The first part of the filament serial number seems to be the Tag UID.

Note

All numbers are encoded as Little Endian (LE).

MIFARE Encryption Keys

Every 4th block (eg Sector X, Block 3) contains encryption keys that are part of the MIFARE RFID standard. This has nothing to do with Bambu Lab's memory format. All Bambu Lab tags use the same Permission Bits (Access Control)

Example Data: AA AA AA AA AA AA PP PP PP PP BB BB BB BB BB BB

position length type Description
0 (AA) 6 RAW Bin A-Key
6 (PP) 4 RAW Bin Permission Bits (Access Control) (always 87 87 87 69 for Bambu Tags)
10 (BB) 6 RAW Bin B-Key (always 00 00 00 00 00 00 for Bambu tags)

Block 0

Note: Block 0 is Read-only. The contents are set by the tag manufacturer.

Example Data: AA AA AA AA BB BB BB BB BB BB BB BB BB BB BB BB

position length type Description
0 (AA) 4 string Tag UID
4 (BB) 12 RAW Bin Tag Manufacturer Data

Block 1

Example Data: AA AA AA AA AA AA AA AA BB BB BB BB BB BB BB BB

position length type Description
0 (AA) 8 string Tray Info Index - Material Variant ID
8 (BB) 8 string Tray Info Index - Material ID

The material IDs all start with the letters "GF" (so far), and the material variant IDs start with the last three letters of the material ID. For example, a variant ID of A50-K0 is associated with a material ID of GFA50.

Block 2

Example Data: AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA

position length type Description
0 (AA) 16 string Filament Type

Block 4

Example Data: AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA

position length type description
0 (AA) 16 string Detailed Filament Type

Known Values:

  • PLA Basic
  • PLA Matte
  • PLA Silk
  • PLA Galaxy
  • PLA Sparkle
  • Support for PLA (prev. Support W)
  • PLA-CF (prev. PLA Tough)
  • PETG Basic

Block 5

Example Data: AA AA AA AA BB BB __ __ CC CC CC CC __ __ __ __

position length type Description
0 (AA) 4 RGBA Color in hex RGBA
4 (BB) 2 uint16 (LE) Spool Weight in grams (E8 03 --> 1000 g)
8 (CC) 8 float (LE) Filament Diameter in milimeters

Block 6

Example Data: AA AA BB BB CC CC DD DD EE EE FF FF __ __ __ __

position length type Description
0 (AA) 2 uint16 (LE) Drying Temperature in °C
2 (BB) 2 uint16 (LE) Drying time in hours
4 (CC) 2 uint16 (LE) Bed Temerature Type (types unknown)
6 (DD) 2 uint16 (LE) Bed Temperature in °C
8 (EE) 2 uint16 (LE) Max Temperature for Hotend in °C
10 (FF) 2 uint16 (LE) Min Temperature for Hotend in °C

Block 8

Example Data: AA AA AA AA AA AA AA AA AA AA AA AA BB BB BB BB

position length type description
0 (AA) 12 RAW Bin X Cam info
12 (BB) 4 float (LE) Minimum Nozzle Diameter

Block 9

Example Data: AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA

position length type Description
0 (AA) 16 string Tray UID

Block 10

Example Data: __ __ __ __ AA AA __ __ __ __ __ __ __ __ __ __

position length type Description
4 (AA) 2 uint16 (LE) Spool Width in mm*100 (E1 19 --> 6625 --> 66.25mm )

Block 12

Example Data: AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA

position length type Description
0 (AA) 16 string Production Date and Time in ASCII (<year>_<month>_<day>_<hour>_<minute>)

Block 13

Example Data: AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA

position length type Description
0 (AA) 16 string Short Production Date/Time...?

Block 14

Example Data: __ __ __ __ AA AA __ __ __ __ __ __ __ __ __ __

position length type Description
4 (AA) 2 uint16 (LE) Filament length in meters...?

Block 16

Example Data: AA AA BB BB CC CC CC CC __ __ __ __ __ __ __ __

position length type Description
0 (AA) 2 uint16 (LE) Format Identifier
2 (BB) 2 uint16 (LE) Color Count
4 (CC) 4 RGBA Second color in reverse hex ABGR

Known Format Identifiers:

  • 00 00 = Empty
  • 02 00 = Color Info

Block 17

Example Data: AA AA __ __ __ __ __ __ __ __ __ __ __ __ __ __

position length type Description
0 (AA) 2 Unknown Unknown