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Re: My NanoVNA is not recognised by DFUse wh

 

Jos, you might want to try going back to an earlier windows restore point to when it was working and detecting dfu.?



On Sun, 10 Nov 2019 at 6:57 PM, Jos Stevens<jrs@...> wrote: Hi Herb,

Thanks for your reply,

Unfortunately I do not have another computer to do that, but as you
describe it it looks very simular , I'm unning Win10 on a HP i7, 8 GB of
RAM, NanoV.BNA runs OK using the NanoVNA-Saver software and DFUse dos
not detect the device, touch the device manager shows STM32 "
bootloader" so my gutfeeling says the problem is in the DFUseDemo
installation, though it performed well before. I will do some more
investigation tomorrow for now it's very late.

Thanks for your info best regards

Jos

Op 10-11-2019 om 23:26 schreef hwalker:

Jos,
Do have you another computer you can run the DFUseDemo? app from?? The reason I ask is because I ran into a similar situation on a PC where Windows device manager showed "STM32 in boot mode and I could connect to the NanoVNA using nanovna-saver, but DFUseDemo? couldn't detect the NanoVNA in the DFU mode.? I eventually tried running DFUseDemo? on another computer and it recognized the NanoVNA? in the DFU mode without any sweat.

I later tried to determine why my other computer (WIN10, i7, 12GB Ram) failed to run DFUseDemo? and a web search said it could be a corrupted or out of date run-time problem (I believe it was one of the Visual C + runtimes).? I found a file on the web named "aio-runtimes_v2.4.8.exe" which uninstalled the runtimes and reinstalled new ones. After re-booting, DFUseDemo? ran fine and connected to the NanoVNA when it was in the DFU mode.

Good luck,

-Herb
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