WebUI won’t load in my web browser but I have a Cyan LED/USB/Ethernet link

If connectivity is unreliable on iPads running iOS / iPadOS 26 or later, update Cerise to firmware 1.8.11. A typical symptom is Cerise appearing in Settings > Ethernet while the IP address and subnet mask fields are empty; Cerise does not respond and its WebUI cannot be reached. Use the computer-based USB update procedure linked above, then reconnect Cerise.

Firmware 1.8.11 improves reliability and sets the default USB IP address to 172.30.0.1 on all Cerise units. We recommend that all users update to 1.8.11 and use this default. The old workaround of changing the first two parts of the IP address is no longer needed.

Certain web browsers don’t work well with certain web pages, we’ve found Safari and Brave aren’t the most compatible. It seems Google Chrome works best in our testing.