Adafruit CAN Bus BFF Add-On for QT Py

The Adafruit CAN Bus BFF Add-On for QT Py is a small, powerful add-on board that turns QT Py boards into CAN bus devices. CAN Bus is a two-wire differential networking standard originally designed for automotive applications but now widely used in robotics and sensor networks requiring long distance and noise-resistant communication.

This BFF uses the MCP26525 chipset (MCP2515 controller plus MCP2551 transceiver), supporting up to 1 Mbps speeds with standard or extended message formats. It features an SPI interface, pre-connected CS pin to A3, and jumpers for IRQ, Reset, and Silent pins.

Key features include:

• JST PH 3-pin socket for easy wiring (cables sold separately)
• Onboard 120 ohm termination resistor, removable via jumper
• Compatible with any QT Py or Xiao board with SPI and A3 pin
• Includes solderable headers (header kit sold separately for removable connection)

Dimensions: 20.7mm x 17.7mm x 7.1mm
Weight: 1.7g

Note: QT Py board and JST PH 3-pin cable not included.