Uart seems not to clear

PlatformIO IDE
,
1

I’ve tested some stuff with UART recently and couldn’t figure out how to clear the UART buffer all the way.

Sometimes it worked like this and sometimes not:

while (Serial2.available())
{
Serial2.read();
delay(1);
}

I couldn’t figure out any other way to clear the buffer, anyone got an idea?

I use a WT32-WROVER-S3 board with the arduino framework…