Makerbase MKS CANable 2.0 Pro USB to CAN FD Analyzer (Fully Isolated, STM32G431)

Specifications

• Microcontroller: STMicroelectronics STM32G431 (ARM Cortex-M4 @ 170MHz)
• Bus Protocol Support: CAN 2.0A, CAN 2.0B, and CAN FD
• Maximum Data Rate: Up to 8 Mbps for CAN FD
• Isolation: Full Galvanic Isolation via onboard Hi-Link DC-DC converter (B0505S-1WR3)
• PC Interface: USB Type-C
• CAN Interface: 3-Pin Pluggable Screw Terminal (CAN_H, CAN_L, GND)
• Termination: Onboard 120Ω termination resistor (selectable via jumper)
• Firmware Compatibility: Pre-flashed/Compatible with Candlelight and slcan
• Operating Systems: Windows (Cangaroo/Busmaster), Linux (SocketCAN), Mac OS
• Dimensions: Compact footprint for field debugging

Applications

• Automotive Diagnostics (OBD2): Sniff and inject packets into car networks safely without risking laptop damage.
• Klipper 3D Printers: Highly recommended for running toolhead boards (EBB36, SB2209) via CAN bus on advanced 3D printers like the Voron.
• E-Bike & EV Controllers: Tune and debug VESC or Kelly controllers that utilize CAN bus communication.
• Industrial Automation: Monitor sensor networks and motor drives on factory floors where heavy electromagnetic interference (EMI) is present.

Unlock New Capabilities

• Past Projects: You might have used basic USB-to-TTL serial adapters for Arduino debugging, or a standard non-isolated CANable, risking your hardware on dirty power grids.
• The Upgrade: This "Pro" version unlocks enterprise-grade safety. You can confidently connect to a 24V/48V system knowing the galvanic isolation will stop stray voltage from traveling back up the USB cable. Furthermore, the STM32G431 upgrade over older F0 chips unlocks CAN FD, allowing for significantly higher data payloads and speeds.
• Effort Level & Requirements: Intermediate to Advanced. Requires familiarity with CAN protocol, termination resistors, and software like Cangaroo or Linux SocketCAN.

Package Including :

• Included in the Box: 1 x MKS CANable 2.0 Pro USB to CAN FD Adapter, 1 x Jumper block (for termination).
• Required Add-ons: A high-quality data-sync USB Type-C cable (power-only cables will not work).

Frequently Asked Questions (FAQ)

• What is the difference between the standard MKS CANable 2.0 and this Pro version?
  The Pro version features full galvanic isolation using a Hi-Link DC-DC converter and optoisolators. This protects your PC's USB port from high voltage spikes and ground loops common in industrial and automotive environments.
• Does this adapter support CAN FD (Flexible Data-rate)?
  Yes. Thanks to the STM32G431 chip, it supports both standard CAN 2.0 and CAN FD protocols up to 8Mbps.
• What firmware does it come with?
  It typically comes pre-flashed with Candlelight firmware, making it plug-and-play as a native CAN interface on most systems.
• How do I use this on Windows?
  With Candlelight firmware, you can use software like Cangaroo, Busmaster, or SavvyCAN to view, log, and send CAN frames.
• Is it compatible with Linux SocketCAN?
  Yes. On Linux distributions (like Ubuntu or Raspberry Pi OS), it is recognized natively by SocketCAN. You can bring up the interface using standard ip link commands (e.g., can0).
• Can I use this for Klipper CAN bus toolheads?
  Absolutely. This is a very popular adapter for bridging a Klipper host (like a Raspberry Pi) to a CAN bus toolhead board (like the BTT EBB36) on Voron printers.
• Do I need to install drivers on Linux?
  No, modern Linux kernels have built-in support (gs_usb driver) for this device when running Candlelight firmware.
• Why is the Hi-Link module important?
  The Hi-Link (B0505S-1WR3) physically separates the power supply of the USB side from the CAN bus side. If a massive voltage spike hits the CAN lines, it cannot cross the isolation barrier to your computer.
• Does it supply power to the CAN bus?
  No. The adapter is powered by your PC via USB. It does not output power to run other devices on the CAN network.
• How do I enable the 120-ohm termination resistor?
  There is a two-pin header next to the screw terminal. Place the included black jumper cap over these two pins to enable the 120Ω termination resistor.
• Can I re-flash the firmware?
  Yes, the board features bootloader pins. You can use STM32CubeProgrammer or dfu-util to flash alternative firmwares like slcan.
• What does the blue/red LED indicate?
  The LEDs generally indicate power, USB enumeration, and TX/RX data activity, though exact behavior depends on the specific firmware version flashed.
• What is the maximum voltage it can isolate?
  The B0505S-1WR3 module typically provides up to 1000V DC or 1500V DC isolation, sufficient for standard automotive and light industrial transients.