Is it possible to use cdc monitoring when using `no_std`?

[DavyLandman]

I have a few s2 and c3 mini's laying around, and want to try and use the new esp-rs tooling to program it.

They don't have all the pins exposed, but with esp-idf that has never been a problem since you can debug/log via de cdc uart.

I've been trying to get it to work for a small hello-world example (generated by esp-generate) but after flashing & rebooting it doesn't connect back as a serial device.

I've seen some issues that discuss this, and the general advice is to define a custom sdkconfig.defaults, but that doesn't fly in no_std environment, as it's really disconnected from esp-idf.

(note I already had to pass --no-stub to the espflash)

Is there a way to work with these chips and get serial prints over the usb cdc?

[bugadani]

esp-println works over the usb-serial-jtag built into the C3, but the S2 has no such peripheral. There is an open issue for using USB CDC, but due to the limited value of that, the feature is not in our focus.

[DavyLandman]

ah, damn I started with the s2, and I didn't check if the c3 (which I agree is a nicer device) might have been better, I assumed it was all the same. I'll report back later if it works and I'll close the issue

[DavyLandman]

Yes, sorry, so this was only an s2 issue, for c3 it works perfectly fine. thanks!