On Thu, Mar 14, 2024 at 10:13:03PM +0000, Cameron Williams wrote: > I am wondering if anyone knows anything regarding the RTS/CTS lines on > the CH341 (maybe CH340 though I have no chip example). > From my tests, neither of them seem to have RTS/CTS respected, and I > don't believe they are fake? > Is this intended behaviour? Looking through the source I can see > RTS/DTR should be supported, but it just doesn't seem to work. The driver does not implement hardware flow control (CRTSCTS) so this is expected behaviour. Johan