UCAN is a small low-cost open source USB to CAN adapter, compatible with CANable hardware. The UCAN enumerates as a virtual serial port on the computer and acts as a serial-line for the CAN bus interface. With the alternative Candlelight firmware, UCAN is enumerated as the native CAN interface on Linux. The UCAN adapter is compatible with ARM-based embedded platforms such as Raspberry Pi, Raspberry Pi Zero, ODROID, BeagleBone, etc. At the same time, it can also be used as USB to CAN application on Klippe-r.