I have a NUCLEO H743ZI board and I want to communicate pc and nucleo-board by using LAN8742 on NUCLEO-H743ZI. I tried many of times but I havent succeeded this. I made communication between pc and STM746VGT6 microcontroller by reference "0x03 Ethernet Wake On Lan Tutorial mit dem STM32F4 Discovery, CubeMX und der CooCox IDE [DE] - YouTube ". I make same things but I havent succeeded. I was also careful about ETH pins. What can be the problem?