The subject of this undergraduate thesis is car speed measurement using sensors and CAN bus communication. Before starting, it is necessary to get acquainted with all components and their roles. Controller Area Network (CAN) is a communication protocol for connecting electronic devices, and communication takes place via serial bus on which there can be two signal levels, namely CANH and CANL with speeds up to 1Mb/s. Due to its reliability, efficiency and simplicity, it has become a standard protocol for use in the industry, especially in the automotive industry. The assembly is controlled by two Arduino Nano microcontrollers that process data and receive and send information via the CAN Bus controller. For that information, the rotation speed was used, which was finally displayed on the LCD screen in kilometers per hour (km/h).