This is spool holder with RFID reader integrated. It reads custom RFID tag on the spool (inside 3mf file you can find adapters for Bambu and eSun spools) and tracks filament quantity in connection with cloud service (quantity is tracked based on tasks running through cloud service). This thing really helps me keep track of the remaining filament on spools so I can optimally distribute tasks among the printers.

Spool holder is inteded to be used with JetForge 3d printing business and farm management software, but you are also free to change firmware the way you like. JetForge is currently at beta testing stage and free plan for hobbysts and small businesses will be available. Please contact me for access to beta version.

Few words about JetForge

It is 3D print farm and business management software, designed for all sizes of 3D printing business (but on first hand keeping in mind garage businesses). It allows to import orders from Shopify and Etsy stores and to match automatically ordered items to files, keeping in mind printer models and materials. It calculates cost for each order taking into account material price, 3d printer hourly cost and energy consumption (using inexpensive zigbee smart power plugs). There's a huge roadmap including AI features, more storefront engines to support, material stock tracking and printer maintenance schedules. I'm will be happy to accept beta testers to checkout the software and give feedback. It's your exclusive opportunity to participate in product creation.

Firmware and project step files:

https://github.com/jetforge/spool-holder/

Hardware:

ESP32-DEVKIT

https://www.aliexpress.com/item/1005007867820740.html
https://www.aliexpress.com/item/1005008370870784.html

(I'm using micro usb 38-pin version. I have some of them left from my previous project so I've made it compatible with them. Feel free to experiment with type-c version or change holes on case for different adapters).

Breakout board for ESP32-DEVKIT
https://www.aliexpress.com/item/1005006026098254.html

1.3" OLED screen

https://www.aliexpress.com/item/1005007451015054.html

MFRC-522 module

https://www.aliexpress.com/item/1005007655966167.html

Extension cable with TYPE-C Socket
https://www.aliexpress.com/item/1005006988168288.html

Button

https://www.aliexpress.com/item/1005003423084423.html

BTT SFS V2.0

https://biqu.equipment/products/btt-sfs-v2-0-smart-filament-sensor

3mm screws for thermoplastics

https://www.tme.eu/lv/ru/details/b3x20_bn2041/shurupy/bossard/3757664/
(I love theese, but you can choose whichever you want)

Ribbon cable

https://www.aliexpress.com/item/4001132905947.html

Cable above matches to color scheme posted in GIT repo. You can use 2.54mm pin headers or just solder wires directly to RFID and screen module PCBs.

Firmware & project files: https://github.com/jetforge/spool-holder