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DS18B20 Temperature Sensor Module provides 9 to 12–bit centigrade temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS18B20 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. It has an operating temperature range of –55°C to +125°C and is accurate to ± 0.5°C over the range of –10°C to +85°C.
This video shows changing in temperature when the finger touched the sensor.
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