When we are sending some data like "hi" in periodic interval of time 100ms STM32f411E discovery getting PC data over uart. But when we send data with fast rate (100ms) then we are facing issue In reception of complete data.

[PBira.1]

Below api we are using to get data from uart ( HAL_UART_Receive_IT ).

[Tesla DeLorean]

Make sure one transaction completes before trying to stuff another, consider using a buffer, accumulating data in that, and using the callback to output next available block of data.