ETH_DMACSR_RBU | ETH_DMACSR_AIS)); __HAL_ETH_WAKEUP_EXTI_CLEAR_FLAG(ETH_WAKEUP_EXTI_LINE); } This gives a more comfortable "RTOS" feeling and works perfectly now. In main-loop something else can be performed. NOW IT IS WORKING PERFECTLY! Best Regards, Roland View solution in o...