Hello @neophte, as you probably saw in the thread that I started (viewtopic.php?f=37&t=34959&p=57918#p57918
) I've tried messing around with a second ethernet port on the minimad, using a USB-ethernet adapter, but that's not working at the moment.
I confirm the approach suggested by @Pierre Guilluy, I generally connect the minimad to an old broadband wifi-modem with build-in ethernet router (but a simple ethernet switch also works) and also connect the art-net-receiving device to one of its ethernet ports, this way the art-net messages from the minimad should find their way via the router/switch to the receiver and at the same time any OSC-messages from another device connected to the router should be able to arrive at the minimad. Also, for troubleshooting, I can easily connect my laptop, or even my phone (via wifi) to the network.
I actually prefer to not rely on DHCP so I assign a manual IP-address when exporting to the minimad, taking care that it's not trying to use the same IP address as the art-net receiver, but it DOES use the same subnet mask.