What to do if the devices can't be added to the Xiaomi Home Secure?

If the devices can't be added to the Xiaomi Home Secure, please refer to the following information:
1. First, check whether the device is supported by the Xiaomi Home Secure and ensure it is connected to the Xiaomi Home App.
2. Make sure the device is properly powered on and in pairing mode, then try adding it through the Xiaomi Home App.
3. Log out of the Xiaomi Home App and log back in, then attempt to add the device again.
4. If the device was previously bound to another account, unbind it first and then rebind it to your account through the Xiaomi Home App.
5. If none of the above solutions work, please provide feedback through the Xiaomi Home App for get further assistance.