U2C CAN Interface Board
$45.00
- Model
1
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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.”
