[Question] Get the return value of a command in home assistant

[vaibhav2912]

Hello,

I am using this integration in home assistant. I would like for the automation to trigger based on the Power state change.

Manually calling the endpoint "com.webos.service.tvpower/power/getPowerState" works. I see a debug log in the event log whose payload tells me the power state. Example. 2022-05-22 18:57:23 DEBUG (MainThread) [aiowebostv] recv(192.168.5.131): {"type":"response","id":51,"payload":{"returnValue":true,"state":"Screen Saver"}}

Home assistant call_service API does not provide a return value so I can't get this output anywhere in home assistant except the debug logs.

I see in the code that we are subscribed to the power state changes and I also do see a log in the debug logs when TV power state changes. Example Active -> Screen Saver

Is there a way to call the getPowerState endpoint and read the data coming back from the TV?

Regards, Vaibhav

[Jasper-itsme]

Wondering the same thing. Calling the command is no brain teaser but how to receive and use data coming from the tv is.

[vaibhav2912]

Because I didn't get any response on this, I did it with Node-Red add-on in HA. Its still not Publish-Subscribe model. I need to invoke the flow in Node-Red to get the latest PowerState of the TV. I have set up a automation in HA to do that so it works OK.

I use node-red-contrib-lgtv 1.1.0.

Use the config node from this to create a config for your LG TV. You need IP address of your TV. I recommend using static IP so your configuration is guaranteed to work.

Set up Node-Red with Home Assistant if you haven't already so you can use the output of the Node-Red flow inside Home Assistant.

The flow to test the API call to LG TV and see the output in the debug window in Node-Red. Copy this and paste in Node-Red import window.

[{"id":"a87c1f750a91bdbd","type":"inject","z":"0ae12e835f14d4d6","name":"","props":[],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","x":570,"y":200,"wires":[["d615edf81c390e96"]]},{"id":"d615edf81c390e96","type":"function","z":"0ae12e835f14d4d6","name":"getPowerState","func":"return {\n topic: 'ssap://com.webos.service.tvpower/power/getPowerState',\n payload: {}\n};","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":820,"y":200,"wires":[["8469f7793527dc01"]]},{"id":"8469f7793527dc01","type":"lgtv-request","z":"0ae12e835f14d4d6","tv":"","name":"requestPowerState","x":1030,"y":200,"wires":[["e0be6dfa88eafaba"]]},{"id":"e0be6dfa88eafaba","type":"debug","z":"0ae12e835f14d4d6","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload.state","targetType":"msg","statusVal":"","statusType":"auto","x":1290,"y":280,"wires":[]}]