We’ve been working on a CAN protoshield for the arduino DUE that includes two of the TI SN65HVD233 transceivers. The prototype is working well with the arduino released CAN library for the DUE and has seen some testing on vehicle for an OBDII library we hope to release soon. The shield has jumpers for termination, RS pin, and the loopback function. There are 0.1in screw terminal blocks for the CAN connections. Not %100 sure if this physical layout is the best configuration….we are certainly looking for feedback.