MCP2551 and MCP2515 I2C CAN-BUS Module Seeed Studio MCP2551 and MCP2515 I2C CAN-BUS Module Board is a small and flexible board that utilizes the I2C for communication, with a default I2C address 0x25 and max I2C speed of 400k. The I2C CAN Bus Module Board is based on the high-performance MCP2515 CAN Bus controller and MCP2551 CAN Bus transceiver, providing a CAN Bus communication rate of up to 1Mb/s.