Luminair doesn't detect my Art-Net interface in Status > Node > Available Nodes
You should use the configuration utility for your Art-Net interface to change it's IP address.
Luminair 3 recommends which IP address range to assign to your Art-Net interface in the Status view > DMX > Art-Net > Output > Node.
Note that some Art-Net equipment does not respond to polling messages, and in those cases will not appear in Luminair's node list. In that case, you can turn Broadcasting to ON and the interface will receive the DMX data as long as both the iOS device and the interface have IP addresses in the same local subnet.