The module won't go into setup mode

Try these in order

1. Turn wall switch 1 on and off five times within 20 seconds, and keep going until you hear the buzzer.
2. Don't switch off the power while you do the sequence.
3. Make sure your Wi-Fi network is stable.
4. Still not working? Factory reset the module (wall switch 2 on and off ten times until the buzzer), then set it up again.