[Xbee modules]
I've not managed to look at the manuals for them
yet, but my main worry
is that they'll require some kind of hardware flow control. Surely, since
I have now read the manuals on their wesite, and from what I can gather
they do use RTS/CTS flow control (as I expexted). It's not always needed,
you can get by without it if there's no chance of a buffer overrun (e.g.
you leave long enough gaps between the characters, maybe also if you have
a low enough baud rate (and the same rate at both ends, I guess).
They look interesting to experiment with (and they're cheap enough to do
just thatt), but I am not (yet) convinced they're exactly what I am
looking for.
-tony