IoT technology is applicable in many areas, but this work describes a specific application of irrigation in agriculture. This work describes the flow of information from the application to the end device and vice versa. Also, development of the application and the hardware part of the project is described. The application was developed using the programming languages HTML, JavaScript and CSS, while the programming language C++ was used for programming the ESP32 and Arduino Uno controllers. The application contains a button to start irrigation, alarms for selecting the irrigation time, a field for entering the duration of irrigation, and a control page where the temperature, air humidity, daily and monthly water consumption are displayed. The hardware reads information about the status of the valve and the duration of irrigation, performs the given actions and sends feedback to the database. By creating the project, high accuracy of data transfer, stability of the application and proper operation of the hardware were achieved.