Smart greenhouse based on the arduino platform

Abstract

The paper describes a system for automatic control of microclimatic factors based on the Arduino platform, whose work and functionalities are shown on the model of the system itself. The Arduino Uno is a control unit of the system that, according to the measurements read from the sensors of temperature (DHT22), humidity and soil (YL69) and light intensity (photoresistor/LDR), controls the ventilation, irrigation, lighting and indication of the need for heating. To monitor the measured values from the sensor and set the optimal limits required for higher and better plant yield, a Nextion touch screen was used, with which the user can easily change the optimal limits value according to the needs of the plant culture. The paper explains the technologies used and the necessary components for system design. The connection of each component with the Arduino platform is explained in detail, accompanied by diagrams and the necessary program code for proper operation. Also, the purpose of each sensor and executive elements in terms of the automation system is explained. Finally, the created model of the system is shown with all the associated parts connected into one ensemble and placed in the appropriate places of the system model. Also, testing of the system itself was done to show the purpose and mode of operation to create optimal microclimatic conditions in the protected area. The whole system is designed to be modular, so that it can be upgraded as needed. The very cost-effectiveness of such a system is assessed by the greenhouse user himself, ie, in this case it is valid: if the payback period is less than the specified project life, the investment is acceptable. the shorter the payback period, the more justified the investment. [9]