I’ve looked at the CAN bus for my project and found it to be very rudimentary.
My project has the constraint that all units have to be connected by a bus or daisy chain. It is not possible to connect all units to the master unit by individual weiring.
A great thing would be an ethernet module like the ENC28 which comes with two RJ45 plugs. It would need an ethernet switch that routes the data and provides ethernet access for the module itself. That would allow to daisy chain my units.
Additionally it would be great if the very same module could supply power for my gadeteer unit via POE (power over ethernet)
What do you think? Is this worthwhile thinking about?
Components could be:
ADM6996M 6 port 10/100 Mb/s Single Chip Ethernet Switch Controller
Si3452/53 PSE Quad port PoE/PoE+ PSE Controller