Connect two CAN bus nodes to the OBD2 port of the AutoPi TMU CM4 or the AutoPi CAN-FD Pro. The DB9 connections each connects to one of the CAN busses available on the devices.
For cable pinout see here. Specifications: Compatibility: For DB9 based connections Connector Types: DB9 (male) to 16 PIN OBD2 (female) Protocol Support: CAN BUS fo...