(1)Based on 40pin GPI0 interface, suitable for series motherboard (2) CAN function, using the SPI interface CAN controller MCP2515, with transceiver SN65HVD230 (3) With RS485 function, using UART control, half-duplex communication, support automatic switching transceiver state without control, transceiver is SP3485 (4) Reserved control interface, convenient for other controllers to control (5) On-board (transient voltage suppression tube), RS485 communication can effectively suppress surge voltage and transient voltage in the circuit, anti-static This product is a RS485 and CAN expansion board designed for , which can solve the problem that does not have 485 and CAN interface; at the same time, it can make and other devices maintain normal communication. Product parameters. Operating voltage: 3.3V CAN controller: MCP2515 CAN Transceiver: SN65HVD230 485 Transceiver: SP34854. Pin Function : Interrupt output : SPI chip select signal : SPI clock input MOSI: SPI data input : SPI data output RXD: RS485 serial receive TXD: RS485 serial transmit. : RS485 receive and transmit Colour:black :PCB Size:65.15 x 30.1MM Package Contents: 1 x RS485 CAN HAT board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.