BigTreeTech
U2C CAN Interface Board
Couldn't load pickup availability
USB-to-CAN bridge for Klipper CAN-bus toolheads. The BIGTREETECH U2C converts a Raspberry Pi USB connection into CAN bus for 3D-printer control boards and CAN toolhead boards.
Why use U2C
- Designed for Klipper CAN setups where the Raspberry Pi talks to the printer over CAN bus instead of a bundle of individual toolhead wires.
- Works with BIGTREETECH EBB-series toolhead boards, including the live BTT EBB SB2240 CAN V1.0.
- Multiple CAN interface formats make it easier to wire to different boards and harness styles.
- CAN bus supports longer runs, many nodes on one bus, and better noise resistance than loose signal wiring.
Specifications
- Function: USB-to-CAN adapter module for 3D-printer electronics.
- Host connection: USB from Raspberry Pi / Klipper host.
- CAN connection: CAN bus output for motherboards, EBB boards, and other CAN expansion devices.
- V2.0 / V2.1 MCU family: STM32G0B1C8, per BIGTREETECH documentation.
- Typical Klipper CAN bitrate: 500000 / 500K, matching BIGTREETECH's setup guide.
- V2.1 hardware notes: Type-C ESD protection, ENIG PCB finish, SWD / hardware DFU firmware update support, and selectable CAN termination.
Intended use
Use this board when converting a Voron, RatRig, VZBot, or other Klipper-based printer to CAN-bus toolhead wiring. Pair it with a CAN toolhead board and proper harnessing such as the BTT 3m CAN Bus Cable.
Version guide
- V1 / V1.1: earlier U2C revisions for USB-to-CAN use.
- V2.1: current 3-CAN-output revision documented by BIGTREETECH / BIQU.
Gotchas
- This is the CAN interface board, not a toolhead driver board by itself.
- CAN wiring still needs correct power, ground, CAN-H / CAN-L orientation, firmware, and termination.
- Only terminate the bus at the correct endpoints; follow your toolhead-board and Klipper wiring guide.
“Worked perfectly with EBB36 and Eric Zimmerman’s guide.”
Shipping & Returns
Returns:
Thank you for purchasing from dfh.fm. I want you to be completely satisfied with your purchase. If for any reason you are not satisfied, you may return your purchase within 60 days of the original purchase date.
Defective items: Please inspect items upon receipt. If you receive a defective item, you may return it for a full refund or replacement within 90 days of the original purchase date. Please contact me to initiate a return for a defective item.
Non-defective items: If you are not satisfied with a non-defective item, you may return it for a refund within 30 days of the original purchase date. A 20% restocking fee will be deducted from the refund amount, to offset the time and inconvenience, as I am the sole employee processing the return and restocking the item. The fee also covers the costs associated with processing the return. Refunds for non-defective items will be issued through the original payment method.
Preordered items: Due to the nature of preorders, delivery dates are subject to change. Please keep in mind that, If you have preordered an item, it is not eligible for a refund until after it has arrived at the store. Once the item arrives at the store and is inspected, you may request a refund within 30 days of the original purchase date. Please note that refunds for preordered items may take up to 10 days to be issued.
To initiate a return, please open a ticket on the shop’s discord channel, with your order number and the reason for the return. We will provide you with further instructions on how to return your purchase.
Thank you for shopping with us. If you have any questions or concerns, please don't hesitate to contact me, via Discord.
Order alterations and cancellations:
Once an order has ben submitted, no alterations can be made. This includes adding or removing items or canceling orders. You are welcome to return an order, once you have taken receipt, following the returns procedure listed above.
Shipping:
US Shipping is via UPS or USPS. The way it is set up shows the least expensive options for standard, priority and express shipping. I can not take special requests for specific carriers at this time.
International shipping is mostly UPS, as I utilize Zonos/UPS integration to tally extremely accurate import and shipping costs.
I require a telephone and email with international orders and you must make yourself available to the carrier or your customs, should they require more information. If you are unreachable and the package is discarded or rerturned, I will not be responsible for rerturning your shipping cost.
If there is a problem with an international order, it is my choice to refund part or all of the order, or send a replacement.
Addresses are verified through Shopify, but the customer is still responsible for inputting their address in the correct format. Any returns or lost shipments, due to incorrectly addressed packages, are the responsibility of the customer.
