dersimn/arduinoonewirepullup

I made a few changes to the library to enable an additional pin, when additional power is requested. Wire up your sensors according to this schematic:

and specify the used pins when creating the OneWire object like this:

OneWire oneWire(ONE_WIRE_BUS, PULLUP_PIN);

Whenever you call the OneWire::write(uint8_t v, uint8_t power) method with power=1 the additional pin will be set to provide more power.
The DallasTemperature library for e.g. does this. If you're using this library you don't need to do more than changing the single line above.