hdmi_cec’s TCP is handy. Now I can connect a Raspberry Pi to the HDMI switch on my TV and potentially control the TV and all the playback devices. With TVs in different rooms, I would like to expand the idea by supporting multiple network endpoints – one RPi running pycec for each TV.
I’m using this setup, which more or less does that: https://menno.b10m.net/home-assistant/post/controlling-my-samsung-tv/