This paper presents the practical development and application of knowledge about embedded systems as part of IoT (Internet of things) technologies in context of real modern issues. The basis of the project is based on client-server communication between a smartphone with Android OS and Raspberry Pi with Raspbian OS, while communication itself is implemented through the Java programming language. By interacting through the user interface developed in Android Studio, the user can remotely control the operation of the embedded system, that is its functionalities, which include garden irrigation and monitoring as well as control of the developed automation system, whose logic takes into account the values of soil moisture sensor readings, combined with weather forecast defines the time and duration of irrigation. Through the chapters, in addition to the functionalities of the system itself, its hardware is explained, along with the periphery, as well as the way in which it is connected and used. The approach to powering the system with solar energy along with setting up a mobile connection using a USB modem offers almost absolute portability and self-sustainability of the system. In accordance with the implemented functionalities, the shortcombings of the same are described as well as some of the potential improvements. With additional refinements and modifications, the system could become applicable in reality.