or will goofy electronics effects I know nothing about come into play to mess me up?
I would DEFINITELY like to avoid the complexities of separate power et cetera for the remote location.
It can be pretty tolerant.
I'm using SHT15 temperature and humidity sensors in my "Barnduino" project.In the data sheet they recommend leads no longer than 8cm!!I'm going to us an ATMEGA328 at each sensor point, 4 per barn and then run RS232 back to a Seeedstudio mega clone, then transmit the data via XBee to the house, the office, my desk and my portable terminal thing.If that sounds like overkill, bear in mind the ATMEGA328's in the barn will also have 2 Seeedstudio water flow sensors attached as well.Probably still overkill, but hey, it's fun and there is not much else to do here in them thar hills!
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