Byron A Jeff wrote:
> In short if
> I needed to pick a simple binary protocol, then why not pick
> UDP/IP/SLIP?

Because it's not that simple.  Even if you use static IP and stick to UDP,
you still have at least an order of magnitude more code than required for a
lightweight binary protocol via UART that is designed for that purpose.

> I had always been thinking of this along a multidrop sensor situation.
> So with EIA-485 and a simple UDP/IP/SLIP stack you can ring up a bunch
> of
> nodes. Of course there's still the contention issue, but that's another
> story.

I think today's answer to this is CAN.  It does handle the contention issue
in hardware, and CAN modules come integrated into many microcontrollers now,
including a bunch of 18F and 30F PICs.


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