USB to CAN Adapter STM32F072 Type C Board for 3D Printer Klipper Firmware Open Source CAN Interface

UCAN is an open source USBtoCAN interface board built around the STM32F072 microcontroller and preloaded with candleLight open source firmware. It provides a compact, developerfriendly bridge between USB and CAN bus environments and works on Linux, Windows, and Mac. The hardware and firmware are fully open source, so you can use the preloaded firmware or develop and flash your own. Key benefits Crossplatform connectivity: plug into Linux, Windows, or Mac systems and access CAN networks without proprietary drivers when using compatible firmware. Open and extensible: complete access to hardware and firmware for , debugging, and integration into custom toolchains. Ready for development: bootloader and SWD headers make firmware updates and incircuit debugging straightforward. Portable CAN interface: small form factor and screwterminal connection make the board easy to add to test benches, prototypes, and embedded systems. Core features CAN protocol: supports CAN 2.0A and CAN 2.0B with baud rates up to 1 Mbit per second. Firmware compatibility: compatible with candleLight V1 hardware pin assignment and offers native socketcan support when using candleLight firmware. Physical connections: USBC connected to MCU via PA11 and PA12; CAN interface connected via PA8 and PA9; 3pin screw terminal for CANH, CANL, and GND. Termination options: default onboard termination uses two 59 ohm resistors. Alternate termination location accepts a single 120 ohm resistor and a twopin jumper. Headers allow enabling or disabling termination. Development headers: dedicated headers to enter the bootloader for firmware updates and a SWD interface for programming and debugging. Preloaded firmware: device ships with firmware installed. If the device is recognized by the host system, it is ready to use. For reflashing instructions, consult the module wiki documentation. Technical details MCU: STM32F072CBT6 USB interface: USBC connected to PA11/PA12 CAN pins: PA8 and PA9 routed to the CAN transceiver interface Terminal: 3pin screw plug for CANH, CANL, and GND Termination resistors: default two 59 ohm resistors; alternate 120 ohm option via jumper Headers: bootloader entry, SWD, and pretransceiver CAN access Typical applications Automotive diagnostics and testing: monitor and inject CAN frames during subsystem troubleshooting and ECU development. Embedded development and prototyping: integrate a USBCAN bridge into prototypes for sensor networks, motor controllers, and custom CAN nodes. Industrial and robotics control: connect PCbased logging and control tools to factory CAN networks or robot bus systems for development and data capture. What to expect out of the box UCAN board with preloaded firmware 3pin screw terminal for CAN connections Onboard termination configured by default Access to bootloader and SWD headers for updates and custom firmware flashing The UCAN board provides a simple, open, and flexible USBtoCAN interface for developers, testers, and integrators who need reliable CAN access and full control over firmware and hardware.