Each DS18B20 has a unique 64-bit serial code. This eliminates the need for an external power source. ![]() In addition, the DS18B20 can draw power directly from the data line ("parasite power"). The DS18B20 communicates via a 1-wire bus, which requires only one data line for communication with a central microprocessor. ![]() This means that the sensor has a programmable upper and lower limit. ![]() The DS18B20 digital thermometer provides 9-bit to 12-bit Celsius temperature measurements and has an alarm function with non-volatile, user-programmable high and low trigger points.
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