Hello everyone, I own a NANOVNA V2 plus4 purchased from the official website, and as reported there, it doesn't measure crystals and tends to have problems measuring narrow-band crystal filters (SSB and CW).
I found this software online that should solve the problem:
v2plus4-ojisankoubou.bin.
It's available on the developer's Japanese website:
https://ojisankoubou.web.fc2.com/index.html
and also in this group:
https://groups.io/g/NanoVNAV2/topic/v2_plus4_ojisankoubou/83997806.
QUESTIONS:
Has anyone tried it?
Is it reliable?
Do you think it can charge without problems, or do you not recommend it?

Hello,

If you read carefully it is clear that it is for a NanoVNA v2 SAA2 clone.

I am sure it will brick firmware!

I wouldn't risk it on a 100% original from Tindie!
(I have a NanoVNA V2 plus 4 and an older compatible clone of course not
compareable to original - which has much better response above 2GHz))
\--
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Am 30.08.25, 16:25, "Loris Bollina via groups.io"
<lorisbollina=mac.com@groups.io> schrieb:

> Hello everyone, I own a NANOVNA V2 plus4 purchased from the official
website, and as reported there, it doesn't measure crystals and tends to have
problems measuring narrow-band crystal filters (SSB and CW).
> I found this software online that should solve the problem:
> v2plus4-ojisankoubou.bin.
> It's available on the developer's Japanese website:
> <https://ojisankoubou.web.fc2.com/index.html>
> and also in this group:
> <https://groups.io/g/NanoVNAV2/topic/v2_plus4_ojisankoubou/83997806>.
> QUESTIONS:
> Has anyone tried it?
> Is it reliable?
> Do you think it can charge without problems, or do you not recommend it?

_._,_._,_

* * *

Hello all,

I have a NanoVNA v2 Plus 4 Pro from Tindie and an older NanoVNA 2.2  100% compatible Clone for comparison purposes. (Of course Tindy Original response is much better on original then on clone!)

I would not risk it to use different firmware - even if some people got it working on originals !

If you read carefully this firmware were originally developed for a NanoVNA v2 Saa2 clone!

Chances are definitely higher to brick it, than with original firmware !

Thanks for the reply... OK... as soon as I can, I'll buy a PLUS 5 and put the PLUS 4 up for sale!
Best regards

According to this post , and attachment
https://groups.io/g/NanoVNAV2/topic/v2_plus4_ojisankoubou/83997806

OwO adapted the "japanese" fw to run on a V2 Plus4.
The  V2 Plus4  firmware is attached to OwO's message