Re: Re:Positional/physical addressing

On 6/24/2025 9:18 AM, Martin Rid wrote:

CAN network?

Each CAN node either needs a unique address to which messages can be
directed;  *or*, to KNOW to listen for particular BROADCAST messages.
So, you either send a message to node 5 to do something
OR, you send a message about that something and expect
that node to know that *it* should process that message.
If all of the nodes are *identical* (hardware and software),
there is nothing to distinguish one device from any other.
If you require an "address"/ID to be programmed into the device
to "make it distinguishable from its neighbors", then you've
added a labor step and a configuration management activity
(how do you know that you don't have two 5's?  how do you know
that the device in your left hand is 5 and your right hand is 23?)
Ideally, you just want the user to reach into a bag of identical
parts and plug them in without concern for which goes where -- and
have the system sort all of that out FOR the user.