MicroPython Forum (Archive)

... It's actually a bit surprising that read(1) even works without blocking asyncio, but I'll take what I can get in this case... StreamReader.read() should never block asyncio: the select.poll mechanism is used to ensure that uasyncio tasks continue to be scheduled until data is available. So your...

I can confirm I see the same behaviour on the RP Pico port. Just spent an hour experimenting to characterize this and attempt to find workarounds. It would be nice if sys.stdin could act like a regular UART, so the USB connection could be treated mostly like a third UART interface, but for now it ap...