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: 192.168.4.1/update
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.