Roku - Modify API calls for greater control

Third party integrations
1

You can do a lot of cool stuff with Roku with nothing more than API calls. No auth needed. I can query my Roku using Postman and get a list of available appIDs (or Channels) and then directly launch a specific app via the ID.
https://developer.roku.com/docs/developer-program/discovery/external-control-api.md#ExternalControlAPI-SSDP(SimpleServiceDiscoveryProtocol)

I found the HA component for Roku, and it works as advertised. After enabling it in the config, I could use the Service GUI and sent a “Home” key press.

But it is limited to “remote type” things only. It can only do what the remote does like send a “Home” command. I want to automate launching a specific channel. Since it can talk to the Roku I assume it is making API calls somewhere. I found the code below and looked at it, but I’m still learning the HA ecosystem so I haven’t figured out what/where I can accomplish modifying the API call.
https://github.com/home-assistant/home-assistant/tree/dev/homeassistant/components/roku

For example, if in Postman I do a
POST http://192.168.1.15:8060/launch/20197
It will launch the Channel ID 20197. This is what I want to automate. For example launch the radio channel in the morning and such.

Can someone point me in the direction? So far all the posts I found in the forum are more about discovery 'n such.

2

Well after saying all that, this morning my HA was populated with a Roku card that allow choosing and launching a channel. Nice. Guess it had not refreshed before I posted last night.

But I still have not found how to do that in a script/automation. Does anyone know the format for launching a specific app?

service: remote.send_command
data:
  entity_id: remote.roku
  command:

… and then the command needs to be “launch appID”. I’ve experimented a couple of ways but so far nothing.