Posted on July 31, 2015 at 12:24Hi Mohajer,I think you have not enabled interrupt correctly so use following line after the USART initialization.__HAL_UART_ENABLE_IT(&UartHandle, UART_IT_RXNE); HAL_NVIC_SetPriority(USART1_IRQn, 3, 0);  HAL_NVIC_Enab...