V1.2.8 using https://github.com/visualapproach/WiFi-remote-for-Bestway-Lay-Z-SPA/releases/tag/v4.4.8
Please note that the connection method has changed from prior versions. Please read the revised Manual.
An Access Point is created called "Lay-Z-Spa Module#####". Look for a new Wi-Fi hot spot on your phone. When connecting to that SSID you need to enter the password layzspam0dule. Then open a browser and enter address http://192.168.4.2/wifi.html. Fill in your credentials and save. Wait a few seconds and restart the ESP.