Re: Russound CAA66 serial strangeness

["Yoram" <yaccri_at_bezeqint.net>]

I'm interested in the protocol.
Can you please send it to 'yaacri at bezeqint.net' ??

Thank you


"Max Metral" <memetral@xxxxxxxxxxx> wrote in message
news:L5ydnah5hv-pmivenZ2dnUVZ_tidnZ2d@xxxxxxxxxxxxxxxx
> So I just got a Russound CAA66 multizone controller.  Looks interesting.
> The serial protocol is public, so I'm writing some code to interface my
> existing system with it.  The docs say "19200 baud with 1 start bit, 1
> stop bit, no parity, no flow control."  I think this means "19200-8-N-1".
> The strange thing is, it seems to "see" my messages fine.  But it's acks
> are supposed to start with 0xF0 and end with 0xF7.  Instead, they start
> and end with 0x3F.  Does this make any darn sense?  The rest of the
> characters actually seem fine, just the start and end don't match.  I
> suppose the most likely candidate is bad docs, because I don't see a
> transformation that makes both 0xF0 and 0xF7 into 0x3F and then suddenly
> resolves itself on the next byte.
>
> --Max
>