The Raspberry Pi is a series of single-plate microcomputers that have been produced since 2012. Their launch on the market caused a great stir among electronics, programming and robotics fans. The devices very quickly became the first choice of many fans of advanced technology, who hobbistically and professionally deal with the construction of electronic and software equipment. Raspberry has a very wide range of applications, which we owe mainly to Hat overlays and adapters, which allow us to expand it freely. They allow for connecting peripheral devices to the board and thus adding extra functionalities. They are useful not only in advanced projects, but also in everyday use. There is a certain number of sockets available in Raspberry, which may not be sufficient in some projects. However, to be able to connect more devices to USB, it is necessary to use special USB hubs. They definitely expand the capabilities of the Raspberry Pi, which we can connect to more external devices.