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Small USB CAN adapter with screw terminals and isolation jumper

SMUGDESK

SMUGDESK CANable USB to CAN Adapter 2.5kV Isolated 120Ω Termination

SKU CH-P2B9-QE1QQ

Open-source USB-to-CAN adapter with 2.5 kV isolation and 120 Ω termination for real-time bus monitoring and ECU debugging

  • Open-source firmware enables full CAN 2.0A/B monitoring up to 1 Mbps
  • 5 kV galvanic isolation protects against surge and EMI in harsh environments
  • Configurable 120 Ω termination via jumper ensures proper bus matching
  • Cross-platform SocketCAN support works with Wireshark and Python-CAN for analysis
  • USB-powered screw terminals allow quick wiring for automotive and industrial debugging

Open-Source USB-CAN Adapter

The SMUGDESK CANable adapter connects a computer to a CAN bus for real-time frame capture and debugging. It suits automotive technicians, embedded developers and hobbyists working on ECU diagnosis or industrial control projects. The open-source STM32 firmware supports both standard and extended CAN 2.0A/B frames. Plug-and-play USB power removes the need for an external supply.

Baud-Rate Range and Platform Support

Adjustable speeds from 10 Kbps to 1 Mbps cover the full CAN bus monitoring spectrum. Native drivers work on Windows, macOS, Linux and Raspberry Pi without extra installation. On Linux the device exposes a SocketCAN interface compatible with Wireshark, CAN-Utils, Cangaroo and Python-CAN for scriptable analysis. DFU bootloader allows in-field firmware upgrades.

2.5 kV Isolation and 120 Ω Termination

The Pro version adds 2.5 kV galvanic isolation to block surge and EMI in harsh environments. A jumper-cap selects the built-in 120 Ω termination resistor for proper bus impedance matching. Screw-terminal CANH/CANL connectors enable fast, tool-free wiring during field service. Buyers who need non-isolated operation or a different connector style should consider other models.

How it compares

Measured against everything we stock in USB Adapter Cables & Dongles, at today’s prices. Recalculated every night.

Price $31.99
Pricier than about 89% of the 1,430 comparable items (median $14.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Should I choose the version with 2.5kV isolation or the non-isolated model?

The Pro version with 2.5kV galvanic isolation blocks surge and EMI interference, making it suitable for harsh industrial and automotive environments. The non-isolated model lacks this protection.

What does the adjustable baud rate of 10Kbps to 1Mbps mean for real-time CAN bus monitoring?

It covers the full CAN2.0A/B speed range, allowing you to capture and analyse standard or extended frames from low-speed body networks up to high-speed powertrain buses in real time.

How does the USB interface affect the maximum capture rate?

The USB-powered, plug-and-play connection uses the host's USB bandwidth and the STM32 firmware to sustain the full 1Mbps CAN rate without an external power supply.

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