Resetting WiFi on LA5900

On the keypad, press 1234*3# - wait at least 5 seconds & then press * for 5 seconds. The Wi-Fi symbol should start to flash.

On your mobile, connect to the same Wi-Fi that you want the Alarm to use. Open the Tuya app, select Add device, Sensors - >Wi-Fi Alarm, choose the new Wi-Fi and enter its password. When the alarm appears, press Confirm.

Please note: you can only change settings whilst the alarm is connected to the same Wi-Fi network it was set up with.