Scientific and Technical Journal


ISSN Print 2221-3937
ISSN Online 2221-3805
The use of hydroponic systems for plants growing in urban infrastructure requires from a per-son to constantly monitor the parameters that affect plant growth. The task of automating such a systems can be solved with the help of Internet of things technologies (Internet of Things, IoT). IoT-devices are used to monitor and control environmental parameters and combining them into a wireless network based on a mi-crocontroller enables the user to remotely interact with the system. In the article the description and the re-sults of performance of compact automated system for plants growing built on the basis of hydroponics and IoT for the management of which ESP32 microcontroller is used was shown. The hydroponic system control model is based on six basic parameters that affect the growth of lettuce: the ambient temperature, the rela-tive humidity, the intensity of illumination, the pH of the nutrient solution, the electrical conductivity of the nutrient solution, the level of the nutrient solution in the service reservoir. Normal conditions, variation lim-its and a set of IF-THEN rules are defined for these parameters within the proposed model. Based on the model, a hydroponic system architecture consisting of an environmental monitoring unit (six sensors) and a control unit (four actuators and a microcontroller ESP 32) is developed. The formulated control model and the developed architecture were implemented as a prototype of a compact automated hydroponic system. Thus, a compact automated hydroponic system consists of a hydroponic installation, an environmental con-trol system and a client-server application, was developed in the work. An experiment to grow lettuce salad, the duration of which was 20 days, was conducted. By the end of the experiment plant culture reached the end of its vegetative growth. The results of experimental studies confirmed the effectiveness of using the hy-droponic system control model proposed in the work, which was built on the basis of production rules.
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