Description: The key point in the crops growing process is to ensure the proper soil moisture regime. To obtain a high irrigation effect, it is necessary to accurately determine the rows and volumes of irrigation, which depend on the type of crops, seasons and climatic conditions of the environment. It is possible to solve the problem effectively by constant monitoring the soil moisture content. To do this, we propose the use of automated soil irrigation systems that are based on the Arduino Uno microcontroller platform, which uses the Atmega8 controller in an SMD case as the converter. The Arduino Uno board is an open source prototype-based platform based on flexible, easy-to-use hardware and software. In order to optimally select the moisture sensor, the comparative characteristic of the practical methodology of soil moisture measurement by a resistive sensor YL69 and a capacitive sensor is given in the article. For the experiment, the dry sandy soil was used. The comparative analysis of capacitive and resistive moisture sensors has proven the feasibility of using a capacitive sensor in an automatic watering scheme to measure the specific soil resistance. The article also shows the scheme of connecting sensors to the microcontroller. The system of automated soil irrigation on the platform of the Arduino microcontroller is proposed, which allows: to optimize water consumption, to irrigate at the given time with a given amount of water, to perform watering even in the absence of the owners in the watering area, to minimize the time spent on irrigation of the area in comparison with manual watering and convenient and comfortable watering. To manage the work of the system of automated soil irrigation, the software code of the hardware computer platform Arduino has been developed. The created automated irrigation system can be expanded both systematically (for any agrarian enterprises) and functionally (by increasing the number of sensors).
Keywords: automated system, Arduino, microcontroller, capacitive sensor, soil moisture, watering, resistivity
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