Is it possible to have two serial ports open on the Pico with one USB connection?

[electronut]

When I plug in the RP2040 Pico via USB, I want to see two serial ports that I can communicate with. One will be used to communicate with the Pico, and the other will be used as a serial passthrough for a second device connected to the Pico. I'd appreciate any suggestions on how to go about implementing this using MicroPython. Thanks!

[Filip_KONAX]

Hi
Sorry for the late answer. Maybe you've already found the answer. If not, here's a pointer to the solution:
This is possible, but not without making your own version of MicroPython. Fortunately others had the same question before you (not me!).
I've found this interesting link for you:
https://forums.raspberrypi.com/viewtopi ... 2#p1979332
Good luck!

[electronut]

Thanks, Filip. I might as well as drop to C for implementing this. I found that TinyUSB has a dual CDC port example:

https://github.com/hathach/tinyusb/tree ... dual_ports

[pythoncoder]

What about the examples using the PIO to implement a UART? See this link.

[Filip_KONAX]

That's an option indeed if you don't need the rest of the features you get using MicroPython

Thanks, Filip. I might as well as drop to C for implementing this. I found that TinyUSB has a dual CDC port example:

https://github.com/hathach/tinyusb/tree ... dual_ports

[Filip_KONAX]

Hi Peter, the question was to have two virtual (CDC) serial ports on one USB connection, don't see how you can do that using PIO

What about the examples using the PIO to implement a UART? See this link.

[pythoncoder]

Ah, sorry. I didn't even know that such a thing was possible.