Hey all!
I just got a google home and a chromecast. I already had a Samsung smart tv ks8000…
I’d like to not only turn on/ off the tv and watch videos using the chromecast but also be able to change channels or use the DVR functions and other apps from the TV itself using my voice with the home…
I also want to ditch wifi from my home so the harmony remote is out of the question… (I’m hooking up the home thru a USB to ethernet adapter)… ideas?
Damn… no one? 
Ditching Wifi makes things very difficult considering that it is increasingly rare to find a device with ethernet, especially low bandwidth devices such as smart homes, etc. Additionally, it should be noted, the KS8000 and those series of TVs have less bandwidth on the ethernet port than on wireless. I know this from previous speed tests with wireless AC on my own KS8000.
To get functionality of the TV’s native OS, you either need the software to be communicate directly with google home, which it doesn’t, or purchase an interpreter, such as a blaster. Everyone will recommend the harmony if you really want that functionality. SimpleControl offers an alexa-enabled, ethernet IR blaster as well.
The only other solution that may work is the NEEO smart home, which seems to have ethernet and an ad-hoc connection between the remote and the brain, likely over a 2.4 GHz link. It may be possible that you could set up the NEEO and never use the remote, and instead, run everything through google voice. I would contact that company to see if that is an option for you.
Naturally, my recommendation would be to use a wifi enabled solution.
As long as you have the TV connected to the same network it should be able to be found. I’m having trouble with this same TV and the latest version of the Android SmartThings app and was told in a trouble shooting step to connect it to my network via hard wire/an Ethernet cable. So being hard wired is just as good if not better than WiFi, as I do with all my AV hardware to insure a solid fast connection. That’s why there’s a RJ-45 port there.
Once connected, who knows what you may have to do . . . things aren’t working for me in a logical manner. That’s why I am here in the threads . . .