>> This saves wires for the connections between the devices, but not the
>> processor pin Mauricio was talking about (to enable/disable the 
>> individual transmitters).

Yes, that's right. I was trying to use the built in USART but needed
distance so I tought of RS485. I have used half duplex rs485 many times and
I know I need the extra pin to toggle between send and receive.

Now, I tough (I guess not much) that full duplex rs485 wouldn't need that
pin. 

Other problem I see is that if I disable all the transmitters since are all
in hiz the receiver (and the master) reads a lot of crap which I don't
want...

I'll start considering the CAN as Olin suggested.
Thank you guys,

Mauricio Jancic
Janso Desarrollos - Microchip Consultants Program Member
info@janso.com.ar
www.janso.com.ar
(54) 11 - 4542 - 3519

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