1.3. Green led quickly blinks twice and repeats, this means the device has
connected to the router but failed to connect to the server. Then please
confirm your WiFi router works normally.
2. Why the APP can’t find the device in pairing status?
Answers: That’s because of your phone’s cache. Please close the WLAN of
your phone then open it after a minute. At the same time, please power off
the device if you can, then power up to try again.
3. My WiFi is expired, can I connect the devices to LAN?
Answers: the S20 supports to be controlled by LAN(Update in 15/10/2017,
LAN function has been stopped).