On 1/29/2012 10:28 PM, Steve Willoughby wrote:
> Rather than the expense of running RS-485 transceivers on each node,
> would it be practical to run a plain TTL level line from one to another,
> and do some kind of synchronous serial protocol over that?

It should be fine, especially considering the short distance, assemble=20
the length of cable you intend to use and try it out of the ground, if=20
it works that way it will work fine in the ground. .  Make sure to use=20
conduit for the wire so that in the future if a break happens you can=20
pull a new wire easily.  The main concerns are the usual buried cable=20
problems,  moisture, lightning, other people digging and cutting the=20
line. The wire is so low voltage that if it did short out the only harm=20
would be to the pic chips.

Mark


--=20
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