The device cannot connect normally, how can I get the MAC of the dimmer switch?

    Open the personal hotspot in the Android phone;
    Use the mobile phone to connect to the personal hotspot in the Android phone;
    Use the mobile phone to connect with the dimmer switch;
    Enter the personal hotspot name and password in the WLAN settings of the App;
    Check the connected device Personal hotspot in the Android phone;
    Find Mac address;
    Connect the switch to other Wi-Fi, and then check the Mac address of the connected device in the router settings.