WebOS (LG) TV, Command payload syntax (service vs node-red)

Third party integrations
1

In the documentation (here) there’s a section for the webostv.command service, where you can send it commands. This refers to a list of endpoints (kind of like commands, here).

Some of these require no parameters, for example volumeUp or volumeDown, and they work fine.

Some require parameters (or I think in the terminology used internally payloads), for example setVolume. I have found no mechanism to pass that in, at least all the variations on syntax I have tried either are not accepted, or do not work (mostly the former).

Now the actual commands can be made to work. In Node-Red for example, there is this set of nodes (here) which use similar commands, though they are wrapped up inside specific nodes. I have not used them extensively yet, but a relatively complicated thing (open the web browser to a page) worked great.

Now I realize I can, in a kludgy way, hook Node-Red up to Home Assistant, e.g. have a script toggle a button which invokes a flow, which does the thing and re-toggles; hope for no race conditions, etc. Yes, I see how that works, can do.

But what I’d really like is some scripts in HA that just call the services with the right payload. Skip all the fake-event flow invocation.

Is there a syntax I’m just missing, or is HA just not as sophisticated in the use of this as Node-Red?

1 Like
2

The webostv.command service does not currently support passing additional parameters, however much of the specific functionality is accessible through other services. For example media_player.volume_set for the use case you give.

Which functionality are you currently missing?

3

Opening the web browser to a specific URL was the thing I was trying to do at the moment.

4

This syntax has been working for me:

open_google_command:
    sequence:
      - service: webostv.command
        data:
          entity_id:  media_player.lg_webos_smart_tv
          command: "system.launcher/open"
          payload:
            target: https://www.google.com
5

Where would one find the available payload properties/parameters to use?
Would that be on LS2 API Index | webOS Open Source Edition

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6

I found pylgtv library to control a WebOS tv. In this file you can find some info on what payload commands need. I just tried to set volume on my device and it worked

service: webostv.command
data:
  entity_id: media_player.lg_webos_tv
  command: audio/setVolume
  payload:
    volume: 8

Hope this can help!

3 Likes
7

Hi all,
I have this setup running as an Automation in HA.

alias: Test
description: “”
trigger:
  - platform: event
    event_type: ""
condition: []
action:
  - service: webostv.command
    data:
      command: system.launcher/open
      entity_id: media_player.lg_webos_smart_tv
      payload:
        target: >-
          https://myurl/api/frigate/notifications/.../.../clip.mp4
mode: single

witch works great as automation. Now i do want to use this to turn on the TV and past the new .mp4 to in via Node Red. I just can’t find a way to get that done. Has someone been able to that?
Appreciate the Help

8

This was very helpful to me, thank you!

9

Sorry to revive this but does anyone know how to use the response from a command? I am trying to duplicate the functionality of the “screen” switch from the homebridge webos tv plugin and so far I can come close but not quite.

I have a switch that calls the command service to turn the screen on & off useing com.webos.service.tvpower/power/turnOffScreen (or turnOnScreen) and that all works fine, I just cannot figure out how to get live status.

I would think I would create an automation that fires every minute or so & calls the LG command com.webos.service.tvpower/power/getPowerState and uses the response to parse the status of the screen (since it is not exposed as an attribute to HA), but I cannot figure out how to view the response to see what I need from it.

Since I cannot get even that far I have not yet had to figure out how to use the response, so I will need to figure that out also, if this is even possible.

Does anyone have any idea?