SpoolmanScale – Open-source filament scale with NFC & Spoolman integration (Public Beta)

[Niko11111]

Yes, another filament scale – but hear me out, this one might actually earn a spot next to your printer. 😄

Hey everyone 👋

I've been working on a hardware project that integrates directly with Spoolman and wanted to share it with this community: SpoolmanScale.

What is it?
An open-source ESP32-based filament scale with a built-in NFC reader and a 3.5" touchscreen. Place a spool on the scale – it reads the NFC tag, pulls the data from Spoolman, and lets you update the remaining weight, log a drying date, or archive empty spools. All on-device. No phone, no app, no manual entry.

Features:

• 🏷️ Bambu Lab NFC tags – automatic read & KDF decryption, material/color/vendor shown instantly
• 🔗 Third-party spool linking – place any NTAG sticker → select spool from on-screen list → linked in Spoolman via extra.tag
• ⚖️ Live weight (NAU7802) – moving average filter, TARE, live diff vs. Spoolman remaining weight
• 📡 Spoolman REST API – update remaining weight, set initial weight, set spool weight (per spool / filament / vendor), log drying date, archive spools
• 📱 Touchscreen UI (LVGL 8.3, 480×320) – settings menu, confirmation popups, sleep/wake, no-tag timer
• ⚙️ On-device Wi-Fi setup – scan networks, enter credentials and Spoolman IP directly on the touchscreen
• 🔄 Automatic firmware updates (OTA)
  SpoolmanScale checks for new firmware releases on GitHub automatically. If an update is available, you'll see a notification on the device and can install it with a single tap, or upload it via browser – no IDE, no cables, no computer needed.
• ⚡ Web Flasher – first-time flash via browser over USB, no IDE needed: niko11111.github.io/SpoolmanScale
• 🌍 DE / EN language support – language selection on first boot, switchable in settings
• 🌙 Power management – display dimming, deep sleep, wake via touch
• 🪵 SD card logging – Insert a microSD card and SpoolmanScale logs all events automatically. Download logs via browser – no disassembly needed. Useful for diagnosing issues and tracking device behavior during beta phase.

It uses the same extra.tag field as OpenSpoolMan, so both tools work alongside each other without any extra configuration.

Currently running stable with a library of 150+ active spools – curious to hear from anyone with an even larger collection!

Status: Public beta – all core features are working. A first wiring and assembly guide is in the README, with more detail to follow.

👉 GitHub: https://github.com/Niko11111/SpoolmanScale
⚡ Web Flasher (no IDE needed): https://niko11111.github.io/SpoolmanScale
💬 Discord: https://discord.gg/GzQzGa5pBG

Happy to answer any questions and looking forward to feedback from the Spoolman community!