I am an engineer in the marine industry and work as a commissioning engineer and need to build something that I can connect to each sensor for alarm testing. The sensor is a thermocouple that is hard wired into the CANbus node. CANbus is the area where I have the least understanding, not taught when I was at uni.(If anyone has links to indepth information, please send me the link) I would like to be able to connect to the CANbus sensor and read it, while also being able to send a false output temperature CANbus signal to raise the temperature being read by the alarm system. I have looked at what is available of the shelf and can´t find anything that can do this. I can see there is some opensource software and making a CANbus reader seems not so hard, but sending a temperature signal over CANbus seems rather difficult. CANbus system runs on 13v with a 120 Ohm resister at the bus end. There are 4 bus with about 6 nodes on each. There are 6 wires in each bus cable. 2 are shields ard the other 4 which run to each node are 1)CAN Hi 2)CAN Lo 3)return 4)13v
Thanks in advance