Mini Spool with NFC Tag

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Since I have more and more filament in stock, I started organizing it and did some research on how to track how many spools and how many grams are left of each type/color. I printed a storage solution for all the spools, so the whole thing looks a bit tidier, and I solved the inventory tracking using Home Assistant + Spoolman. It wasn't simple because Bambu Lab is not known for how open its system is... However, I still managed to implement the thing to some extent.

I entered the data of all spools into Spoolman and then connected it with Home Assistant. The P2S printer was also connected to Home Assistant, so when a print is finished, an automation script runs and deducts the consumed filament quantity from the amount remaining on the spool in stock.

Unfortunately, since the Bambu Lab printer does not share that much data, the system only works for single-color prints.
 

The operation in brief:

• Each printed mini spool has an NFC tag, from which I read the ID number in Spoolman using my phone.

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• This is then written into the corresponding AMS slot in Home Assistant, and from then on, when a print is finished, the system will know which spool to deduct the consumed amount from.

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I used an NFC Tag purchased on BambuLab, but any NTAG215 type will work for this.