NanoVNA H4 Stuck in DFU Mode

[@richardharris5819]

Thanks for the info.. You always have had great knowledge transfer.

[@janiceemery2008]

Love it as always Matt, thank you for sharing.

[@n3vanradio]

Thank you very much. Hoping this helps someone with the same issue!

[@clems6989]

Thanks for the videos Matt N3VAN, from Matt N8QZH...."73"

[@Sal-e4u]

Hi Matt, Can You advise me on the other methods this one did not work the U DISK drive don't show up on the desktop Thank You

[@CanyoneerDuke]

Thanks Brother. And thanks for the NanoVNA info

[@n3vanradio]

You are very welcome. Your NanoVNA was safely packaged and on its way back to you :)

[@Sal-e4u]

Hello Can you do a video open it up and show how to do shorting pins Thank You

[@KS0JD]

Great video! It would have been interesting to see how you do the in reset as well. 73

[@n3vanradio]

Thank you! Maybe someone will have a NanoVNA that is more stuck than this one that I can show the other methods :) 73!

[@manuelcv9475]

Perfect explanation

[@n3vanradio]

Thank you very much!

[@test-uc2sc]

After attempting to follow the updating procedure in the previous video, my Screen is blank, and I get an error message saying "The last USB device you connected to this computer malfunctioned and Windows does not Recognize it" . The device does not show up in the Device Manager/USB Controllers listing now. Is there a "factory reset" button? Thanks.

[@n3vanradio]

Sometimes this method works other times you have to do the hardware method.
1. Open NanoVNA-H
2. Short VDD with BOOT0
3. Turn on NanoVNA-H --->>>
White display = DFU mode
4. Write Firmware.
Hope this helps! 73 Matt N3VAN

[@XRPforever]

Hello I don’t have the menu. Not with button and with pen.

[@Michael.G-1871]

☝👍💯❤

[@SalCornacchia]

Hi Matt, Can You advise me on the other methods this one did not work the U DISK drive don't show up on the desktop Thank You