Temperature And Humidity Monitoring System Of Greenhouse Based On STC Microcontroller

In order to develop the modern agriculture,improve agricultural production efficiency and make full use of resource, the development of greenhouses technology has become the important technical method to ensure the production of crop. In the process of crop growth, temperature and humidity in the surrounding environment is always the important factors that affect its development and final yield. Studying how to control the temperature and humidity of the greenhouse greenhouses, keeping the favorable environment to ensure crop growth in order to increase the production of crop, based on the greenhouse temperature and humidity as the research direction, and combined with the development of temperature and humidity real-time monitoring technology at home and abroad, In this paper, we research and design a set of greenhouse temperature and humidity wireless monitoring system.The system consists of main control module, the temperature and humidity sensor module, wireless data transceiver module, temperature and humidity displaying module and temperature and humidity automatic adjustment module. In this paper, we use STC89C52 RC MCU as the core control module to control digital temperature and humidity sensor DHT11 module, to gather temperature and humidityin the greenhouses, then display the data on the LCD1602 module.At the same time the main control module sends the data to a remote PC, through serial port communication wireless data transceiver module, the remote PC can obtain the data, and then it will save data, the wireless data transceiver module wue use is APC220-43 wireless communication module. In computer we use VB tools to develop the software interface, the software can record the change of temperature and humidity every day in greenhouses and draw the curves of temperature and humidity for using. In the software interface, you can easily set the threshold of the temperature and humidity. Through wireless communication module, the threshold will be sent to the main control module, finally the control module in the greenhouse will control the sprinklers and fan to change the temperature and humidity. This design is simple for installation,and strong anti-interference, low cost and easy for generalization.We believe that eventually it can be well used in the actual agricultural production.