Hereby a tutorial to connect an MCP2515 based CAN bus interface to an OrangePi 3 running successfull with Buster minimal nightly with 5.3 kernel. It uses the attached user overlay only and doesn’t need any other overlay.   Connections CAN module OPi3 26 pin header Raspberry CAN interface 40 pin header Vcc 3.3 CON12-P01 1 Gnd CON12-P06 6