Why can't I use "DMR-CLEAR_MEMORY_DFU.dfu"
Its only purpose is to erase existing firmware in a device.
A nanoVNA with that firmware installed can >>ONLY<< install firmware.
I downloaded and verified DMR-CLEAR_MEMORY_DFU.dfu
that is linked in
Is there a previous stable version of type "800_aa" (without bugs)?
Previous, probably more stable, maybe some different bugs:
Oristo