Nowadays electronics and software are more and more important in all areas of everyday life. This trend can clearly be seen in mechatronics, automotive, and aerospace applications, but also in medical engineering, robotics, and home entertainment. Considering automotive field, today a car includes up to 100 ECUs that are all connected each other and communicate with other vehicles and infrastructures. Therefore, it becomes more and more challenging to develop and test vehicle ECUs in this complex network. For this reason, hardware-in-the-loop technology (HIL) has become an important aspect during the electronics development process of a vehicle, crucial for testing single ECU and ECU networks.