The default password for the car camera WiFi hotspot is always 12345678
The link and QR code for the control app can be found in the instructions in the product box or at https://www.lamax-electronics.com/en/car-cameras/n4/
The inability to connect to WiFi can have several reasons:
1) Make sure you have WiFi reception enabled on your smartphone. WiFi will automatically turn on for the camera a few seconds after it is started.
2) Make sure you have all permissions enabled for the app.
3) The app is not updated