e a digital thermometer based on single-chip control, and propose a design scheme for a digital temperature measurement and control system based on single-chip application for room temperature detection. The scheme uses a temperature sensor to convert the changes in indoor temperature into changes in voltage, which is processed by the single-chip and then controls the digital display to show the actual indoor temperature. This system has temperature upper and lower limit alarm functions. The article describes in detail the temperature detection system based on the AT89C51 from both hardware and software aspects. The system uses the DS18B20 as the temperature detection device, with additional temperature display and over-temperature alarm functions. The DS18B20 temperature acquisition sensor directly transmits signals in a single-line connection, and the use of digital data transmission greatly improves the system's anti-interference ability. Therefore, the digital single-bus device DS18B20 is suitable for on-site temperature measurement in various environments. It has made significant improvements in temperature measurement accuracy, conversion time, transmission distance, and resolution compared to previous temperature sensors. The system has the characteristics of simple structure, reliable operation, small error, and low cost. The article also provides a detailed description of the AT89C51 and DS18B20, and a careful analysis of the system principle. Keywords: single-chip; sensor; temperature measurement
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