This bachelor´s thesis deals with the analysis of MIDI protocol and especially MIDI SysEx messages, that are nowadays used more and more. The purpose of this thesis is the layout and realization of equipment, which will be these SysEx messages send over MIDI bus and simultaneously shows the description of these messages on one-row display. In the first part the solved thesis deals with MIDI, its history, definition of conception, linkage of hardware for communication and of cours analysis of language, that protocol communicates. The main Channel mode messages are analyzed, that MIDI system uses to basic operation for communication between various instruments in MIDI system. Especially System Common Mesagges are addicted and mainly SysEx mes...