discover_chromecasts doesn't work on machines with multiple network interfaces

[Baughn]

Specifically, it only sends the multicast message over the primary interface. Any chromecasts connected to secondary interfaces won't be discovered.

It needs to iterate over all interfaces.

[balloob]

The problem is within my uPnP implementation.

The Cast platform started using zeroconf next to uPnP. I wouldn't be surprised if uPnP would eventually be deprecated. The plan for PyChromecast is to use python-zeroconf.

Migrating would also fix this bug as they just added preliminary support for multiple network interfaces.

[balloob]

I just upgraded PyChromecast to use python-zeroconf. The latest version of python-zeroconf on Pypi does not have support for multiple devices yet so this bug is not fixed yet.

[pcnate]

I have the same issue. I ended up switching my cable to the other port and changing my network configuration to work around the issue for now.

[j-mie]

Can confirm this is still an issue :(

[skorokithakis]

This is an issue for me as well, no chromecasts will be discovered (running latest master).

[rearchitec]

I have the same issue. Therefore, i can't use chromecasts as media_player on HA.

[OttoWinter]

@fryyk0220 You can still add them manually. See host: on https://home-assistant.io/components/media_player.cast/

[rearchitec]

@OttoWinter Adding this setting to my config resolved the issue, Thank you for your advice.

[JumpMaster]

I'm having the same issue using Home Assistant within Docker. Docker is running on the host network but can see all networks. After installing tcpdump I see the following when trying to discover Cast devices.

17:41:39.252896 IP 172.17.0.1.5353 > 224.0.0.251.5353: 0 PTR (QM)? _googlecast._tcp.local. (40) 17:41:40.254188 IP 172.17.0.1.5353 > 224.0.0.251.5353: 0 PTR (QM)? _googlecast._tcp.local. (40) 17:41:42.253728 IP 172.17.0.1.5353 > 224.0.0.251.5353: 0 PTR (QM)? _googlecast._tcp.local. (40)

My home network is on a 192.168.0.0/24 range but Zeroconf is using the IP from the default Docker bridge network. Pychromecast works correctly from a device with a single nic and the Home Assistant container is able to ping all Chromecast devices. I see it should be possible to manually set the interface within Zeroconf but I haven't been able to get it to work successfully. I'm not sure I'm adding the code correctly. If this were to work the IP could possibly be set via an environment variable?