Mirzayev ShoxruxSherobod XudayqulovAbdilazizov SardorTursunboyev Samandar2025-11-172025-11-172023-12-122980-4299https://dspace.kstu.uz/xmlui/handle/123456789/2021This article presents the development of a program and project for automatic control of soil moisture using the FC-28-C sensor. An Arduino microcontroller is used to interface with the sensor and control a water pump and solenoid valve. A moisture set point is defined in the code and the current moisture level is continuously measured by the sensor. If the moisture falls below the set point, the water pump and solenoid valve are activated to irrigate the soil until the moisture level rises above the set point again. The system allows precise and automated control of soil moisture for applications such as gardening, agriculture, and landscaping. The article provides details on the sensor interface, control logic, and irrigation components. Results demonstrate the ability of the system to maintain soil moisture within +/- 3% of the defined set point. Further development could incorporate more advanced control algorithms, expanded sensor networks, and integration with weather data to create intelligent irrigation systems tailored to specific plants and environmental conditions.enArticle