jtroxas wrote:

> Cant find any info on rs232 ring networks on the net..
> But I thought of some idea about it..
> When you talk about A talks to B and B talks to C.. Is it something like 
> this..
> TXpin of A connected to RXpin of B
> TXpin of B connected to RXpin of C
> TXpin of C connected to RXpin of A
> all Max232Chips sharing the same ground...
> 
> A only talks to B and B only talks to C and C to A..
> 
> so that when B wants to talk to A.. the data has to be passed like this..
> B sends to C, C sends to A...
> and A replies to B directly...
> 
> is this RS232 ring networking??

Sounds like it; it definitely could work if you can live with the delay
(and with the fact that the whole network is partially down when one node
is down). 

But you could also use a RS485 network. All are on the same two wires, the
drivers can handle some ground differences, the only thing different from
RS232 that you need to do is implement some protocol so that everybody
knows when they may send. This is usually not too difficult. Typically a
master polls every slave regularly.

If you like the ring idea better but may have ground problems, you still
can use RS485 drivers with the ring topology.

Gerhard

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