I’m still learning how to use the SparkFun CAN485 controller board. The examples provided can ether read the bus or write to an arbitrary CAN bus . If anyone is using this product to send a command to and read back the response from a vehicle OBDII bus I’d like to see it.
Meanwhile I am trying to blend the ASTCanLib Rx and Tx examples with the logic of the mcp_can library example "OBDII_PIDs, from Loovee, into one example to help users, including myself, pull data from our car’s computers.