umidity, and human production and life are closely related, especially in the fields of medicine, electronics, aerospace, food fermentation, agricultural production, etc., where strict temperature and humidity requirements are necessary. They are the most common and basic parameters, and are widely needed for real-time detection and control of temperature and humidity in various industries such as machinery, electronics, petroleum, and chemical industry. With the improvement of people's living standards, people are paying more and more attention to their living environment. The changes in temperature and humidity in the air directly affect human comfort and emotions, so it is very necessary to detect and control temperature and humidity.
By using the STC89C52 single-chip microcomputer to design a temperature and humidity monitoring and alarm system, it can respond instantly and accurately to the changes in temperature and humidity inside and outside the greenhouse. It can achieve various control methods such as heating to a specific temperature, cooling to a specific temperature, maintaining a constant temperature within the temperature limits, and the same goes for humidity control. Applying this system to a greenhouse undoubtedly provides a more suitable environment for plant growth. For greenhouse cultivation and floriculture, it is necessary to install temperature and humidity devices in specific environments to monitor them.
This system can promptly and accurately reflect the changes in temperature and humidity inside and outside, meeting the control requirements for temperature and humidity.
Keywords: temperature, humidity, monitoring, STC89S52.