Hello dear people,

I have a problem with my Nano VNA S-A-A V2.2
50Khz-3Ghz
CPU is installed => GD32F303 CCT6
After a firmware update with DfuSE:
Nothing works with my Nano VNA S-A-A V2.2!
The screen of the Nano VNA is completely white after switching on.
I can no longer update via DfuSE, the DFu device (Nano VNA) is no longer found (USB device).
The short-circuit method VDD with BOOTO does not work !!!
However, I have access to the Nano VNA S-A-A via the ST Link V2, via this connection I can address and flash the VNA:

Address: 0x08000000
Size: 0x20000
Data width: 8 bits
Firmware: nanovna-v2-20201013-v2_2

After the firmware update (nanovna-v2-201013-v2_2) still a white picture, nothing else.
I use this firmware for flashing => nanovna-v2-20201013-v2_2.bin
See also https://nanorfe.com/nanovna-versions.html

I shot the bootloader while flashing the firmware to address 0x08000000.

Is there a possibility that you email me the bootloader (thanks)
If the address for the bootloader is 0x08000000 => setting via ST Link / v2 => is that correct?

And the firmware then comes to address 0x08004000 is that correct?

Request for Info!

Thank you and greetings

Hello!
Please reed manual for you V2 device (SAA-2) on
https://nanorfe.com
You use a false program. DFuSeDemo is for NanoVNA-H and NanoVNA-H4 only!!!
You need NanoVNA-QT from developer site nanorfe.com
Have You 2.8 or 4 inch display?
Vladimir

You bootloader is ok. You can not destroy bootloader with DFuSeDemo or with NanoVNA-QT

Vladimir

My bootloader is OK. How should I know that.
I flash the firmware as indicated with ST Link V2.
Nevertheless I have the errors as described, read my test => first mail!
What should I do?
The solution of the problem ?
Ask for info, thank you and greetings

Why use You ST-Link? FW update for V2 (SAA-2) devices is possible with programs NanoVNA-QT or NanoVNA-APP.
Please reed this. :
https://groups.io/g/nanovna-beta-test/message/3109

If You can not reed , please register in Forum of nanovna-beta-test
nanovna-beta-test+subscribe@groups.io

Vladimir

Hello!
Haben Sie meine ditect email bekommen oder liegen die Briefe im Spamordner in Eurem Mailbox?
Vladimir

@ Vladimir,
Happy New Year and the "nano-group" !

Thank you, too, for taking care, the instructions for "DiSlord" are great!
That's exactly what I was looking for.
I'll test it out today and send you feedback.

Greetings from Germany

@ Vladimir @ DiSlord, @ everyone who helped

Here is my feedback:

I just flashed my NanoVNA, works perfectly according to the instructions.
Thanks again to everyone who helped, thanks to the forum!

Happy New Year and greetings