On Sat, Jun 21, 2008 at 5:16 PM, Timothy J. Weber wrote: >> For lighting controls you might want to look into DMX. > > I do have some light controls, but even those modules use bidirectional > communications, which DMX apparently doesn't do. And I'm thinking a bit > more generally than DMX appears. Actually it does now. RDM (remote device management) is an ANSI standard built on the DMX512A ANSI standard and is backwards compatible with regular DMX512A. Check out ESTA (http://www.esta.org) to purchase copies of the standard. Josh -- A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist