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'LON and CAN (CEBUS alternative)'
1999\08\05@122536 by Craig Lee

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I've evaluated LON, CAN, MODBUS, etc.  and nothing compares to CEBUS.

http://www.cebus.com  Check it out, you'll be glad you did.

The powerline stuff is starting to exceed 10Mbit/s, blowing away the 120
bit/s of X10, and there are physical layer specs for RS485, RF, IR, etc.

The problem of custom chips is still there, but the price is reasonable,
and there are at least a couple sources.  Also, there is huge buy in
as this is supposed to be the new home automation standard.  Lucent,
Cutler Hammer, and Microsoft, to name a few.

CEBUS packets allow the addressing of 0xFFFF homes with 0xFFFF nodes,
sending 256 bytes data per packet.

The other neato thing is the use of contexts.  ie.  A TV will have volume
up/down power on/off channel up/down  pip on/off etc.  A light switch will
have power on/off dim up/down.  Thus your packetization is as simple as your
device and doesn't require a big micro implementing 17 software layers to turn
on a light bulb!

For an example product, see http://www.intelogis.com  They make a powerline
peer to peer networking solution for sharing data between 2 computers and
sharing a printer.  10Mbit over power line, $99 for the package.  Too good
to be true?


Craig



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