Design of an Environmental Parameter Monitoring and Intelligent Control System for Vegetable Greenhouses Based on AT89C51 Microcontroller

Hanbo Zhang

doi:10.54097/rq1h0038

Authors

Hanbo Zhang

DOI:

https://doi.org/10.54097/rq1h0038

Keywords:

Vegetable greenhouse, AT89C52 microcontroller, Environmental parameter monitoring, Automatic control, Sensor technology.

Abstract

To address the issues of low efficiency and inadequate accuracy of environmental control occasioned by the old manual management in vegetable greenhouse, the current work constitutes an intelligent vegetable greenhouse control system based on AT89C52 microcontroller. The system consists of a microcontroller that is the central component, a DHT11 temperature and humidity sensor, a light sensor with a photosensitive sensor, and MQ-135 CO₂ sensor. The ADC0832 converts analog signals in order to collect the essential data on conditions such as temperature, humidity, the level of light, and the CO₂ concentration ratio in real-time. The system operates automatic devices like heating wires, fans, and water valves to maintain good growing environment of plants using set limits. Meanwhile, information is displayed on the real-time basis on an LCD1602 display, and the control limits and mode switching are done via matrix buttons. Proteus software is utilized in the work to create a simulation platform in which to carry out testing followed by hardware-software co-debugging to check.

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