If you’ve ever seen a hex code where an English error message should be, you know the feeling: your device is speaking, but not in any language you taught it.
require the "LibUSB Win32" filter to be installed specifically for the "MediaTek USB Port" or "Preloader" device. Use the filter wizard to uninstall and then re-filter the device while it is connected in the error state. Use "Disable Auth" (MTK): handshaking... error unexpected response 0x68
A $20 USB logic analyzer (Saleae clone) will end all guesswork. Probe the RX and TX lines. Look for: If you’ve ever seen a hex code where