How can I connect to the Wiolink's WLAN?

Yes, it should be added to the FAQ.

Could you try those steps as below:

  1. Connecting your phone to your WiFi router first
  2. Make the Wio Link into config mode ( press the Func Button almost 4-5 seconds, then the BLUE light onboard will into “breathing mode” )
  3. click Plus icon on top-light in App
  4. then follow steps which the App shows

Hoping it can help you.