Design of a Smart Agricultural Greenhouse Monitoring and Control System Based on the 52 Single-Chip Microcomputer
Abstract：To solve the problems of low accuracy, time-consuming operation, and inability to dynamically monitor in traditional methods of temperature and humidity measurement in greenhouse planting technology, a smart agricultural greenhouse monitoring and control system has been designed. The system uses the STC89C52 microcontroller as the core controller, and the DHT11 temperature and humidity sensor for data acquisition. The data is displayed in real-time on an LCD1602 liquid crystal display screen, making it convenient for users to observe the environmental information inside the greenhouse. Users can set the upper and lower threshold values of temperature and humidity through independent buttons. Once the system detects conditions exceeding the preset range, the audio-visual alarm circuit will issue an alarm. If the temperature is below the threshold, the heating pad starts heating; if the temperature is above the threshold, the fan starts; if the humidity is below the threshold, the humidifier starts working; if the humidity is above the threshold, the dehumidifying fan starts. Experimental results show that the system operates stably, effectively achieving real-time detection of environmental temperature and humidity, alarm for over-limit conditions, and corresponding function execution. It has advantages such as a simple structure, reliable performance, and cost savings.
Keywords：Smart AgricultureMicrocontrollerTemperature and Humidity
Publication Date：2025-02-27
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 35-38 )