Add support for V2

[nanovna]

This patch adds support for V2 (S-A-A-2) hardware.

I have only tested this on Linux (debian), consider testing more platforms and more V1 device/firmware variants to make sure it doesn't break anything before merging.

[mihtjel]

Hi,
thanks for these updates. Is there documentation for the protocol used with the "NanoVNA V2"? Is the hardware available yet "in the wild"?

[nanovna]

There is a preliminary user guide that has a description of the protocol:
ug1101.pdf
See "Appendix II – USB data interface".

Some users have been sent sample/demo units.
If you would like a sample write to [email protected]

Wide availability of the hardware will begin after Chinese New Year.

[goldstar611]

Hi @nanovna I have a PR open that may need adjusting if yours is merged first. Could I ask your help testing my PR with the v2 nanoVNA? It basically adds a "pause stimulus" serial command after scan/sweep. You should only need to add a def pauseSweep override in your class.

#173

Let me know if it works on the v2 nanoVNA, thanks!

[nanovna]

Hi, I'll be doing a rebase later after your patch is merged, and then I can fix any issues that come up.

[zarath]

I don't know when Rune gets time for working on NanoVNA-Saver again (and when he get's his V2).
In the mean time I've done some rebasing on nanavna's patch as well as Windows fixes on my fhttps://github.com/zarath/nanovna-saver/tree/feature/nanovna-v2 branch.

And as Rune noted somewhere, he isn't working on master branch, so he likes to get MRs to the Development branch.

Regards
Holger

P.s.: There seems to be some problems with S21 measurement with that patch (mentioned in groups.io mailing list. But I've not got the time to check and conform this issue.

[zarath]

I have merged and adjusted the code for the current Development branch and made it available as master in my repository https://github.com/zarath/nanovna-saver.git

But not fixed that mentioned s21 issue

[zarath]

included in v0.3.0