this post was submitted on 19 Jan 2025
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Their filament has RFID tags that contain the optional print settings for that filament, such as model temperature, bed temperature, etc. The RFID reader only exists on the AMS, and doesn't actively block 3rd party filament from being used. The tag is on the spool itself, so even if they did block filament, you could just transfer it to a Bambu spool.
It actually looks like the private key has been extracted now, so it's kind of game over as far as blocking 3td party tools. https://hackaday.com/2025/01/19/bambu-connects-authentication-x-509-certificate-and-private-key-extracted/