I have done a lot of work with DS18B20 1-wire. Working on testing a 20 temp probe hub all connected to arduino. Using external power configuration. The parasitic mode I have found does have limits when you get into the higher probe counts on the network. you can check work out at...
This is a good idea as arduino's are gaining ground as a major platform for all types of automation. Lots of intersting things being done with them in this regard.
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