Hi @SnakeZZ
The issue you're facing is due to mDNS, which is used for device discovery and is blocked by your network's firewall settings. To resolve this, you'll need to enable mDNS traffic between your networks in your firewall settings.
This will allow your mobile device to discover your Dingz and other IoT devices. Most IoT apps, including the Dingz app, rely on mDNS and do not support manual IP configuration, so enabling mDNS is essential for proper functionality.