Before I wade into reverse engineering I was wondering whether anyone happened to know what protocol the IOS app uses to detect Volumio players.
I have a couple of Volumio players connected to an IOT VLAN with it’s own WiFi segment. I was thinking I might be able knock up a relay agent to forward the device announcement packets across the VLANs so my wife can use the Volumio app on her phone without switching WiFi networks.
You will only be able to detect them with mask 255.255.255.0, SO if you connect the devices on a different subnet it won’t be detected.
Another option might be connecting via https://play.volumio.com/
That would be another way to say what I said, yes.
The router (obviously) has an interface on both VLANs which raises the possibility of creating a relay agent.
Similar to this, GitHub - udp-redux/udp-broadcast-relay-redux: Small daemon to relay udp broadcast / multicast packages on a different subnet.
To finish this off for anyone who is interested.
Ubiquiti saved me the trouble of reverse engineering by adding MDNS and UDP reflectors to their Unifi software. My wife is now able to find our volumio players connected to either of our WiFi segments, mostly.