The FAQ of AP Mode is listed as follows.
Q: How to enable AP mode of door station?
if your device doesn't have left button, please remove the cover then you can see the button.
Q: What is the default password of device hotspot?
A: The hotspot SSID name is AP_device SN, for example, AP_K12345678. Before activation, the Wi-Fi password is on the label of door station. After activation and after login in mobile phone browser, you can modify the device activation and Wi-Fi password.
Q: I enabled the AP mode some time ago, but now I can't search the hotspot with my mobile phone or laptop.
When the AP mode is enabled, if long pressing the left button for 10 s, the AP mode will start a new 30-minute countdown.
Q: How to disable the AP mode?
A: Just long press the left button for 15 s. Or if no device connects the AP, it will be disabled in 30 minutes automatically.