Over-the-Air programming (OTA) is a system upgrade wirelessly. The device has an open WiFi network / Nautilis controller /.

Connect to it.

After connecting, with a browser open the upgrade page. It is located at the IP address of the network to which you have connected  & / update. Most often it is:
You can view the IP address in the WiFi network settings or by starting the Nautilis management.

When the upgrade page opens, find the firmware file and upgrade the system.