The possible reasons are as follows:
1. Check the email is in your trash can.
2. Please change another email address to register again, EX: gmail、hotmail、163、qq、etc
Setup routers to a 2.4GHz Wi-Fi network
QR code cannot be recognized, the possible reasons are as follows:
1. Mobile phone screen resolution is too low
2. Screen is too dark
3. Too far from the lens
4. Reflection
Suggestions:
1. The phone screen is facing the lens
2. Adjust phone screen brightness
3. Adjust distance between the phone and the lens