I need to design a truck fleet monitoring system and make a prototype of it during my traineeship this year. I've been looking into the different buse networks that are already implemented in trucks nowadays notably the famous OBD II. I wonder if it is possible, if I want to add new sensors to the trucks, to implement them within the already existing buses (CAN or other)? otherwise what is the best way to communicate both with the OBD system in the truck and the multiple sensors I might add to the truck? Finally can I make my own CAN buse system in the truck in addition to the one already in it?
I'll appreciate your help.