I have a 2001 Gillig bus with a Cummins ISC engine. Is there an inexpensive way to get the OBD Cummins data from the engine OBD port. How about the VOITH transmission and ThermoKing HVAC OBd's or the chassis OBD
I haven't found an app to work with heavy or medium duty stuff yet. The adapters I picked up for automotive will work with anything that uses an OBDII connection, it's just finding the proper phone software that will "talk" to the vehicle.