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Update README.md
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@maxicus
maxicus committed Jan 25, 2016
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Expand Up @@ -4,3 +4,7 @@ No external pull-up resistor required on a board for 1-wire devices as a result.

Details here
http://wp.josh.com/2014/06/23/no-external-pull-up-needed-for-ds18b20-temp-sensor/

To activate internal pull-up specify

#define ONEWIRE_INTERNAL_PULLUP 1

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