One-Wire Protocol
1-Wire multiplexes data and (parasitically) power onto a single pulled-up line, encoding bits as precisely timed low pulses, so communication depends on microsecond-accurate timing rather than a shared clock. Every device carries a factory-lasered 64-bit ROM ID, letting many sensors such as DS18B20s share one pin and be enumerated by a search algorithm.
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1-Wire multiplexes data and (parasitically) power onto a single pulled-up line, encoding bits as precisely timed low pulses, so communication depends on microsecond-accurate timing rather than a shared clock. Every device carries a factory-lasered 64-bit ROM ID, letting many sensors such as DS18B20s share one pin and be enumerated by a search algorithm.
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