Turn it off, put the battery back in, and try the default passwords listed above again. 4. QR Code / App Reset If your login screen has a QR Code icon next to the password box: Click the icon to display the reset QR code Dahua Wiki Scan it using a compatible app like
Use a tool like the SuperPassword utility or the CCTV Super Password app (available on Android/iOS). dvr model ahb-8204 hnn super password
Enter this code at the login screen. Note that this code is usually only valid for that specific calendar day. 3. Physical Hardware Reset Turn it off, put the battery back in,