| I just found a way to recover my bluetooth module. The root cause of
failure to enter DFU mode is because the default boot mode is HID instead
of HCI mode. To change the default boot mode, you have to find a tool
to change pskey value. After changing the default boot mode, I can
reflash the saved DFU without problem. However, it looks like some value
is ruined by the generic.dfu. The vendor string is totally gone. Still find
a way to resolve it. |