The high-precision practical automatic temperature and humidity control system of granary realized by single chip microcomputer is controlled by AT89C5 1 single chip microcomputer, so it has the characteristics of small size, low cost, simple use and reliable work. In addition, the integrated temperature and humidity sensor DHT 1 1 is used as the detection element to detect the temperature and humidity of the granary in different directions, and the data is transmitted to the single chip microcomputer through the hardware circuit, and the temperature and humidity data in different directions are displayed through the LCD display of RT 1602C 2 * 16, and the single chip microcomputer makes corresponding operations on abnormal points at the same time, such as knot/kloc. The system can conveniently realize the real-time control of temperature and humidity of granary.

Keywords: AT89C51; DHT 1 1； rt 1602 c； Temperature and humidity data collection; Single chip microcomputer navigator

DHT 1 1: It is an integrated temperature and humidity digital sensor produced by Guangzhou Aosong Co., Ltd.

RT 1602C: Be 2 * 16 LCD screen

Temperature and humidity data collection points: distributed in three different granary orientations, and the change of orientation should reflect the change of temperature and humidity of granary as a whole.

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