You beat me to it. There are some good ones out there but they are rare. I have not had to do it recently so I can no longer recommend any. What is really an

You beat me to it. There are some good ones out there but they are rare. I have not had to do it recently so I can no longer recommend any. What is really annoying is how over the place the USB ones are in quality and drivers. The rub is they almost work. In many cases they are fine. But some of them have very odd modes of working fine then becoming jittery. What is also annoying is you can find a brand that 'works great' then the next batch they switched something out. Then there are some out there if your software does not play with the rts cts 'pins' correctly the whole thing will get out of wack. So your can end up in a condition where it works rock solid on real hardware but the USB will refuse to work correctly because you did not follow the 'standard', or worse sorta work.