Spool Inspector RF
$125.00
$149.00SaleSmart filament spool tracker with real-time weight monitoring, camera-based QR code detection, OLED display, and a built-in web dashboard — plus a PN532 NFC/RFID reader for RFID spool tags. Track your filament usage across multiple spools with WiFi connectivity. (Beta)
Recognizes Bambu, Elegoo (PLA), eSun(when available), and any TigerTag encoded spool
Write your own RFID tags to label your spools
Features
- Weigh filament spools in real time with a precision load cell
- Automatically identify spools by scanning QR codes with the built-in camera
- Also reads RFID spool tags via the built-in PN532 NFC/RFID reader
- View weight, spool info, and status on the OLED display
- Monitor remotely via the built-in WiFi web dashboard
- Integrates with 3dspooltracker.com for multi-spool tracking and history
What's Included
- •Fully assembled Spool Inspector RF station
- •3D printed enclosure (housing, lid, OLED cover, scale, base)
- •Pre-soldered main PCB + button PCB with all headers
- •Seeed XIAO ESP32S3 Sense with OV5640 camera installed
- •PN532 NFC/RFID reader board, wired
- •SSD1306 OLED display, wired and mounted
- •5kg load cell, wired and calibrated
- •Piezo buzzer and tactile buttons, wired
- •USB-C cable for power
- •Spool label position template
Additional Information
Every Pre-Built Inspector RF is fully built, tested, and connected to your account so all you have to do is connect to your wifi and you are up an running!
Each one ships with a card in the box holding a code for a free year of 3D Spool Tracker Pro ($35 value) (Existing Pro users find the discount code in your settings for $35 off)
- Unlimited AI photo-ID scans — snap a photo, we identify the filament (20/mo with a device and no Pro; 15/mo on the free plan without one)
- Unlimited gcode storage — keep every sliced file tied to its print (Free plan: capped at 5)
- Unlimited Spool Inspectors — connect as many devices as you own (Free plan: 1)
- Cost analytics — real cost-per-print and cost-per-gram, calculated automatically
- CSV & full account export — your data, always exportable, never locked in
- Public REST API and Webhooks — build your own integrations and automations
No credit card required — your Pro year starts when you redeem the code on the card in the box. After 12 months, keep going for $5/mo (or $35/yr), or drop back to the free plan — your spools, history, and data stay exactly where they are either way, and owning an Inspector keeps full Reports and 20 AI photo-ID scans a month free.
Ready to use out of the box — just plug in USB-C, flash the firmware, and connect to WiFi. See the User Guide to get started.
Only 5 left in stock
Every pre-built Spool Inspector RF unit includes a free year of Pro.
When the subscription ends you keep full Reports and 20 AI scans/month, free, for as long as you own the device - even if you don't renew.
On top of everything the free account contains, your Pro subscription includes:
- Reports and cost analytics — what you've spent, what your inventory is worth, cost per print, usage trends over time. Free accounts only see a summary.
- Unlimited AI photo scans — photograph a spool label and it fills in brand, material, color, and print settings automatically. Free accounts get 15, any device owner gets 20.
- Full data export and account backup — every spool as a CSV, or your entire account as a single file. Your data, yours to take.
- Unlimited paired Inspectors, so adding a second scale later costs nothing.
- Access to the public API and WebHooks so you can build your own integrations (Home Assistant, etc)
When the subscription is up, nothing breaks and nothing charges you. Reports and cost analytics stay unlocked and AI scanning continues at the 20/mo level for as long as you own the device. Everything you've entered stays exactly where it is.
For detailed specs, firmware updates, and documentation visit 3dspooltracker.com
Use at your own risk. Items sold here are hobbyist DIY electronics intended for experienced makers. Installation may involve soldering, modifying your 3D printer, and working with low- or line-voltage power. You are responsible for proper assembly, safe wiring, and use. We are not liable for damage to your printer or other equipment, personal injury, or other losses arising from installation, use, or failure of these products. By purchasing, you agree to assume all risk.