I don't know, I need to do more studying and experimenting, but I appreciate anyone's help on the issues.
google finds this, which maybe of use to you ?
https://github.com/Noltari/pico-uart-bridge
Raspberry Pi Pico USB-UART Bridge
This program bridges the Raspberry Pi Pico HW UARTs to two independent USB CDC serial devices in order to behave like any other USB-to-UART Bridge controllers.
and a thread here
https://www.raspberrypi.org/forums/viewtopic.php?t=302684
However, I do not see mention of any test results, covering tested baud ranges and actual throughputs ?
It would be nice to see a FT232H or FT2232H connected to a Pico, and then things pushed, to see where they break
With only USB-FS speeds, the UARTS are likely to only be good for low-Md region speeds, but Pico may be nice as a more-flexible-than-FTDI type solution.
Thanks, I took a look, bookmarked it and wandered through the thread. The problem I was having was simply gettimg WIN 7 to load up usbser and eventually I got that to work.
When I get something like this (I have no RPi experience), I like to think about some project that is worthwhile that I can get into. So, basically, I just want the Pico on a board that contains, for example, an I2C sensor. The board with sensor is attached to a PC. A nice, easy to use, program running on the PC allows you to set the sensor's memory/variables. Take, for example, some of the Honeywell T/H sensors where you can set alarm levels- that sort of thing.
You plug the board in (with the sensor in a socket), do whatever you need to do, pop the sensor out, and your done. Once you have a VS program working, they work rather nicely, I think.
The Pico plugs into the PC, communicating as a serial port (with no additional board). User reads and writes settings, which the Pico programs into the sensor using its I2C interface. All you need is the socket and a couple of simple components (a couple of resistors and capacitors).
Makes it pretty attractive for only a few bucks, I think. In fact, at the sale price of US$2, they are about as cheap as any FTDI USB/serial board alone.
That guy's program that you linked to makes multiple USB serial ports, which as mentioned in the thread, has some uses as well.