Features 1、Highly Compatible: RS485 and CAN expansion for RPi series motherboards add more hardware interfaces, expand more functions, and broaden the hardware development environment. 2、Support CAN: Using the SPI interface CAN controller MCP2515, paired with transceiver SN65HVD230, it is powerful and provides another stable data transmission method between devices. 3、Support RS485: Using UART control, half duplex communicating, automatic switching of send and receive state without program control, effectively simplifying the development process and saving a lot of development time. 4、Flexible Control Interface: Reserved control interface, this expansion board can work with other controllers, which greatly improves the convenience and practicality of project implementation. 5、Safe to Use: The onboard TVS transient voltage suppression tube, RS485 communicating process can effectively inhibit the circuit surge voltage and transient spike voltage, provides a certain degree of anti static protecting, increasing the safety of the use of equipment. Specification Item Type: RS485 CAN HAT Board Material: PCB CAN Controller: MCP2515 CAN Transceiver: SN65HVD230 485 Transceiver: SP3485 Product Features: 1. Based on for RPi 40pin GPIO interface, suitable for RPi series motherboards. 2. With CAN function, using SPI interface CAN controller MCP2515, with transceiver SN65HVD230. 3. With RS485 function, using UART control, half duplex communicating, support automatic switching of transceiver state without program control, transceiver SP3485. 4. Reserved control interface, convenient for other controller control. Package List 1 x Expansion Board 5 x Screws 3 x Nuts 1 x Instruction Manual