1 -Wire System for Temperature Mea urementAbstract In this paper,the structure and principle as well as technical characteristics of 1 - Wire System are introduced,and the protocol and operation flow of 1 - Wire System as well as the function and structure of DS18B20 digital thermometer are described. A 1 - Wire adaptor based on RS - 232 serial communication port is implemented,its principle of design and circuit diagram are given. Finally,the simplified and effective search arithmetic for 1 - Wire components is given.Keywords 1 - Wire System Digital thermometer iButton DS18B20
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