Update: 2018-07-19 Preview：3052 For:PH5 、
Step 1: Use ethernet cable to connect PC with PA6 or connect PA6 WiFi by PC.
Step 2: Open bowser and enter plc.tendawifi.com in address bar to login the setup page.
Step 3: Enter default password “admin” in “Login password” and tap “Login” button.
Will it help you?