While researching ways to cast or mirror my /e/ device (FP3+) screen to a TV, I stumbled upon this open bug.
So it seems I won’t be able to use the “cast” feature for the time being.
Are there alternatives? USB? Reasonably cheap HDMI adapter? Custom (OpenSource) App?
As potential receivers I have
A Raspberry Pi 3 with LibreElec connected to wired LAN
A Playstation 4
A old “smart” TV which is firewalled from the network and internet, because there aren’t any security patches since 2016 or so
It doesn’t have the full casting functionality you might be hoping for, but various apps will allow you to cast pictures & videos. For example, open a picture in the Gallery app and choose the Share option. You will see on option to share via Kodi (LibreElec.) Browsers offer the same sort of thing for website pictures & videos.