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Re: DFU mode not working #nanovna-app #nanovna-h4


David McGuire
 

Hello Shirley. I am very confused. I feel I need to update my NANOVNA-H 4.

Current version is 1.1.01, build time Dec 20 2021.

The unit has a flickering blue line at the top of its screen. I am hoping an upgrade will help.

I want to use it for SWR for amateur radio antennas. Nothing more fancy that this task.

- I have downloaded and installed STM32CubeProgrammer.
- I have downloaded and extracted NanoVNA v.1.0.69 fw pack.zip.
- I pressed the "wheel button" and turned the unit on. The screen stayed dark. I plugged it into the USB cord. And, nothing.
- I opened Device Manager to see if one of my USB ports was USB2. Nope. All USB3.

What needs to be my next step?

I appreciate your help.

David

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