Automatic filament spool tracking (Multi-toolhead supported)

UPDATE

As I mentioned below this is more of a project then an actual print. I am working on adding support for the Box Turtle AFC system.  I am currently in a testing phase now. I also plan to add support for OpenPrintTag and OpenTag3d!

This is actually a full system I am working on for spool tracking for multi-toolhead Voron printers using NFC tags, ESP32-S3, and Spoolman.  It should work for any klipper capable printer. I give full instructions on my github on how to set this up. It works like this:

Scan an NFC tag on a filament spool → automatically sets the active spool in Spoolman → updates Fluidd per toolhead → Klipper tracks filament usage → LED on each toolhead confirms the scan and displays the spool color.

Scan NFC tag
     ↓
ESP32-S3 + PN532 reads UID
     ↓
ESPHome publishes to MQTT
     ↓
Python middleware on Pi
     ↓
Spoolman lookup by UID
     ↓
Moonraker sets active spool
     ↓
Fluidd shows spool per toolhead
     ↓
LED flashes white 3x (scan confirmed) → Shows spool color

Full github here:
https://github.com/sjordan0228/nfc-toolchanger-spoolman/

The two model files I am uploading are modified versions of this model: https://makerworld.com/en/models/2108947-esp32-c3-pn532-nfc-reader-case-usb-c#profileId-2552448
I made changes to have it fit waveshare esp32-s3-zero and also added txt for my toolhead (T0, T1 etc).

For this setup I opted to build a unit for each toolhead. I use a filament dryer so this works out well for me. I am sure you can simplify things but the benefit of having a scanner per toolhead is it makes thing easy and allows you to take advantage of the led the esp32 has built in.

Feel free to comment with ideas if you have any. I wrote this in a few hours so its fairly simple.