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Green rectangular HAT board with dual terminal blocks and DIP switches

MCDODO

MCDODO RS485 CAN HAT for Raspberry Pi 5/4B/3B+/3B/2B/B+/Zero/Zero W/WH/2W

SKU CH-WD62-5Z18A

Adds long-distance RS485 and CAN bus connectivity to Raspberry Pi boards via MCP2515 and SP3485 transceivers with onboard TVS protection

  • TypeSingle Board Computers
  • Adds CAN bus to Raspberry Pi with MCP2515 controller via SPI
  • Extends RS-485 reach using SP3485 transceiver and 120 Ω termination
  • Protects interfaces from surges with onboard TVS diodes
  • Runs on 3.3 V logic compatible with all supported Pi boards
  • Includes Python and wiringPi examples for rapid development

RS485 CAN HAT for Raspberry Pi

This HAT adds RS485 and CAN interfaces to Raspberry Pi boards from the Zero series through the Pi 5. It uses an onboard MCP2515 controller with SPI and an SIT65HVD230DR transceiver for CAN, plus an SP3485 transceiver for RS485 half-duplex UART communication. The board operates at 3.3 V and includes development resources with wiringPi and Python examples.

Check pin header and voltage compatibility

Verify that your Raspberry Pi model provides a standard 40-pin GPIO header and 3.3 V logic levels before fitting the HAT. The board draws power from the Pi’s 3.3 V rail and uses SPI and UART pins for the MCP2515 and SP3485 transceivers. Reserved control pins are available if you plan to stack another control board on top.

Sustained load with TVS protection and termination

Onboard TVS devices suppress surge and transient spike voltages on both RS485 and CAN lines during continuous operation. A 120 Ω terminal resistor for each interface can be enabled via DIP switch to maintain signal integrity over long cable runs. Automatic TX/RX control on the RS485 side reduces software overhead in extended sessions.

Points forts

  • Adds CAN bus to Raspberry Pi with MCP2515 controller via SPI
  • Extends RS-485 reach using SP3485 transceiver and 120 Ω termination
  • Protects interfaces from surges with onboard TVS diodes
  • Runs on 3.3 V logic compatible with all supported Pi boards
  • Includes Python and wiringPi examples for rapid development

Caractéristiques

TypeSingle Board Computers

Questions sur cet article

What comes in the box and do I need any extra cables or connectors for the RS485 and CAN interfaces?

The HAT board itself is supplied; the RS485 and CAN interfaces use onboard terminal blocks so no separate cables are required for basic wiring.

Should I choose the MCP2515 CAN controller or the SP3485 RS485 transceiver for my project?

Both are onboard simultaneously — the MCP2515 handles CAN via SPI while the SP3485 handles RS485 via UART, so you do not select between them.

What does the 3.3 V operating voltage mean when the HAT is mounted on a Raspberry Pi 5 or Zero 2 W?

The board draws 3.3 V from the Pi’s GPIO header, so it works directly with every supported model without an external supply.

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