Need help with figuring out how to change FireTV input to antenna via source selector or adb shell command

I am trying to create an automation that will turn my lights on and turn my FireTV on and to the local news station which I get via antenna. This gets triggered when my phone alarm goes off. I have everything working besides navigating my FireTV to the antenna input. I have tried setting the action as call service → Media player: Select source → and I have also tried starting using an adb shell command but neither of those attempts worked. Any help is greatly appreciated.