This paper describes a design based on single chip AT89S52 wireless temperature alarm, the design uses a single chip single-bus temperature sensor plug-piece collection of Temperature DS18B20, after controlling 315MHZ wireless communication module 2262/2272 for wireless transmission of temperature data, the transmission distance 20 meters above the launch of this design is divided into acquisition, display and output control to receive two hardware circuit design, the receiver set up four user buttons can be set alarm temperature set of data by way of memory AT24C02 IC2 be saved, a combination of sound and light alarm circuit, when received Temperature exceeds the value of the user Yushe O'clock alarm buzzer, Tong Shi Kai Guan control through relay external devices (such bells), to achieve the objective of Ti Shi and control. Text focuses on the hardware system are given parts of the circuit description, describes the function and application of AT89S52, wireless communication module principle, IC2 way reading and writing data memory AT24C02, as well as the procedures for the various circuit modules to achieve and so on. The wide field of circuit design applications, scalability, strong.
Keywords: Wireless communications, 2262/2272, temperature measurement
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