You can use UART, all you need is a CAN PHY which is maybe 50ct as a break out board https://doc.riot-os.org/group__drivers__dose.html https://doc.riot-os.org/

You can use UART, all you need is a CAN PHY which is maybe 50ct as a break out board https://doc.riot-os.org/group__drivers__dose.html https://doc.riot-os.org/group__drivers__dose.html