https://www.hobbyist.co.nz/sites/default/files/docs/RTC/DS18B20.pdf
참고소스
#include#include #define ON true#define OFF false#define TEMP_INT_PIN 19#define TEMP_EXT_PIN 7OneWire temp_int(TEMP_INT_PIN); //internal temperature sensorOneWire temp_ext(TEMP_EXT_PIN); //internal temperature sensorfloat temp_int_value;float temp_ext_value;String textline;String date_delimiter = "/\