Here is a implementation of a DS1820 PAR device that you can use in the bread-board view.
It is done by myself and release it as GPL.
It is made in 3 layers so it can be expanded easyly with other 1wire deveices.
Have fun with it.
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After considerable rework, extension and testing the extras module has been added supporting ds1820, ds18s20 (same as ds1820) and ds18b20.