The article discusses the simplification of the development of the user interface of embedded systems. The use of automata-based programming approach simplifies the development and improves the reliability of the user interface program of the built-in system. Simulating a user menu with multiple state machines reduces the memory footprint of the program code. Often at the present time in UI programming, embedded control systems apply the intricate nested or repeated cyclic design with various flags and switches. Such constructs make it difficult to read and especially modify the user interface, and lead to unexpected program states that are quite difficult to find and fix when debugging. Due to explicit state selection and transition between, automata-based programming will allow to restore order in UI programming and build reliable software for embedded multi-level custom menu. The aim of the work is to select the optimal method of finite state machines application in the development of the user interface of embedded systems. An example of the development of the user interface program for the control unit of a lifting electromagnet using automatic programming technology is given. We studied the simulation of the custom menu one state machine and multiple state machines. The use of automata-based programming made it possible to develop a simple, easy to read and easy to debug program code. Minimization of the graph automaton and the allocation of the sub-state machines have significantly reduced the amount of memory programs. Similarly, one can develop a program for the user interface of other control devices.