Method1:
Log in the web UI, then go to Device Settings Wi-Fi Settings SSID Settings, and find the current Wi-Fi password.
Method2:
Reset the device to factory default settings.
Use a paper clip or a blunt pin to gently press the reset button for 3 seconds.
The Wi-Fi key will be reset to the default password, which can be found on the bottom label of the device.
During the reset, all LEDs will turn off, then all on with blue, finally the LEDs turn on according to actual status, and then the reset is completed.
i. Others