## FilamentIQ — Automatic filament lifecycle tracking for Bambu Lab printers

Third party integrations AppDaemon
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1

After a few weeks of building and testing against my own P1S setup, I’m releasing FilamentIQ as an open source AppDaemon app.

The problem it solves

If you use a Bambu printer with multiple AMS units and Spoolman, keeping spool weights accurate is tedious. Filament gets consumed, spools get swapped, RFID tags don’t always report reliably — and Spoolman falls out of sync.

FilamentIQ automates all of it.

How it works

Five AppDaemon apps work together:

  • ams_print_usage_sync — after each print, calculates how much filament each spool consumed and writes it to Spoolman
  • ams_rfid_reconcile — maintains spool identity across all AMS slots using RFID tags and color/material fingerprints
  • ams_rfid_guard — policy enforcement, detects and flags identity violations
  • filament_weight_tracker — periodic weight snapshots for drift detection
  • spoolman_dropdown_sync — keeps HA input_selects in sync with your Spoolman library

Consumption allocation (the interesting part)

FilamentIQ uses a three-tier cascade to allocate consumption as accurately as possible:

  1. 3MF file parsing — FTPs into the printer post-print, extracts per-filament used_g directly from the slicer output
  2. RFID fuel gauge delta — uses start/end weight snapshots from Bambu RFID tray sensors
  3. Time-weighted estimation — splits total consumption by tray active duration as a final fallback

Requirements

  • Home Assistant with ha-bambulab integration
  • AppDaemon addon
  • Spoolman
  • Bambu Lab printer with AMS

Installation

Available as a HACS custom repository:

Category: AppDaemon

### Links

- GitHub: https://github.com/jdempsey77/filament-iq
- Full docs included in the repo (architecture, configuration reference, troubleshooting, dashboard setup)

Feedback and PRs very welcome — this is working well on my setup but I'd love to know how it holds up on others.
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