Using a chromecast without a google account?

cross-posted from: https://programming.dev/post/19441371

cross-posted from: https://programming.dev/post/19441320

cross-posted from: https://programming.dev/post/19441267

I have a 2nd-gen chromecast, it's factory reset. If i plug it in all it tells me is to install the app to start configuring.

I don't have a google account not do i want to install/use google-related stuff on my phone.

My home router doesn't register any new device, which makes sense since the cast doesn't know the SSID/pass of the WiFi.

Does it try to ping some service/port? Multicast perhaps? Where would it get an IP from without authenticating?

My (wired) PC runs gentoo.

How can i get it to work in these conditions?