NFC spool tags
Stick a tag on each filament spool and your printer can know what's loaded: material, colour and temperatures. Open OpenSpool format, genuine NXP tags, posted from NSW.
Available now
Tag packs
Blank or programmed for your filaments. From $15 for 10.
Order tags →
Free
Tag writer
Write and read OpenSpool tags from Chrome on Android. Runs on your phone; nothing is uploaded.
Open the writer →
In testing
Spool reader
A small Wi-Fi reader: tap a spool and it tells your Bambu Lab or Snapmaker U1 what’s loaded.
Join the waitlist →
What works with what
Printer makers lock their own spool readers to their own tags, so it pays to check before you buy.
| Setup | Reads our tags? | What you need |
|---|---|---|
| Snapmaker U1 with Extended Firmware | Yes, on the built-in readers | Community Extended Firmware (paxx12). No extra reader. |
| Snapmaker U1, stock firmware | No | Stock firmware only reads Snapmaker's own tags. |
| Bambu Lab P1, A1, X1 with an OpenSpool-compatible reader | Yes, through the reader | LAN-only mode + Developer Mode on current firmware. |
| Bambu Lab AMS on its own | No | The AMS only reads Bambu's signed tags. |
| OpenSpool readers | Yes | Nothing extra. |
| Klipper + Spoolman | With community add-ons | e.g. nfc2klipper and a USB or PN532 reader. |
Tag packs
10 blank tags
$15
Genuine NXP NTAG215, 25 mm. Write them yourself with the free writer.
10 programmed tags
$25
Tell us your filaments and we write and label each tag.
25 programmed tags
$49
Enough for a full shelf. Same as above, best value.
The Mojo spool reader
A small box that sits by your printer. Tap a tagged spool on it and it lights up in the filament’s colour and tells the printer what’s loaded in the slot you picked. It also writes tags, so iPhone owners don’t need an Android phone.
- Bambu Lab P1, A1 and X1: sets the AMS slot or external spool over your local network.
- Snapmaker U1 with Extended Firmware: sets each toolhead.
- Reads and writes the open OpenSpool format, USB-C powered, printed case.
We’re building it now and will run it on our own printers first. It needs Australian RCM approval before we can sell it, so no date or price yet. On current Bambu firmware it needs LAN-only mode and Developer Mode.
Questions
What's on the tag?
The OpenSpool format: material, colour, brand and temperatures as a small JSON record, plus bed temperature, weight and diameter. It's open, so any OpenSpool-compatible reader or app can read it, not just ours.
Which tags do you use?
Genuine NXP NTAG215 stickers, 25 mm round. We check every batch with NXP's TagInfo app, because cheap clones often fail to write.
Can I rewrite them?
Yes. We don't lock tags, so you can rewrite one with the free writer when you refill or reuse a spool.
Will these work in my Bambu AMS?
Not on their own. Bambu's AMS only accepts Bambu's own signed tags, which nobody else can make. Our tags work on Bambu printers through an OpenSpool-compatible reader sitting next to the printer, and on current Bambu firmware that needs LAN-only mode and Developer Mode.
When is the reader coming?
We're building it now and testing it on our own printers first. Before we can sell it in Australia it needs RCM approval. Join the waitlist and we'll email you once when it's ready.
“OpenSpool-compatible” describes the open data format; Mojo Layers isn’t affiliated with the OpenSpool project, Bambu Lab or Snapmaker.