no wifi signal or the signal is weak;the rotary switchis fail to enter configuration mode and fail to enter the configuration mode of blue running-horse lamp;wrong wifi password; time of configuration is over 2 mins
wifi signal is weak or disconnected;app version is too low;the firmware of the smart toilet is not updated to the latest version.
power on the whole machine again;upgrade the app version and the firmware version of smart toilet;make sure the rotary button switch is on the blue running-horse lamp status when connecting to the mobile.