# Nodered + Home Assistant activate scene with specific application **URL:** \ **Category:** General\ **Created:** [24 April 2021 08:43 UTC](https://discourse.nodered.org/t/nodered-home-assistant-activate-scene-with-specific-application/44647 "2021-04-24T08:43:46Z")\ **Posts on this page:** 11\ **Page:** 1

**Author:** ![cranx](https://avatars.discourse-cdn.com/v4/letter/c/a587f6/32.png) [@cranx](https://discourse.nodered.org/u/cranx)\ **Post date:** [24 April 2021 08:43 UTC](https://discourse.nodered.org/t/nodered-home-assistant-activate-scene-with-specific-application/44647/1 "2021-04-24T08:43:46Z")

Hi all! I'm trying to get my lights in the living room to dim when watching movies/series. I've a scene made in Home Assistant to dim the proper lights. So I'm watching on a Nvidia Shield and it is connected to my HA so it can read if it is on/off or playing/paused but also which application is started. For this I would like to filter out some apps I don't want my lights to dim when started, like Youtube. Does somebody have any idea how I would do that in Node-Red, which Node I should use and what JSON Data to use? Many thanks! Darryl ---

**Author:** ![rgerrans](https://avatars.discourse-cdn.com/v4/letter/r/2bfe46/32.png) [@rgerrans](https://discourse.nodered.org/u/rgerrans)\ **Post date:** [24 April 2021 14:40 UTC](https://discourse.nodered.org/t/nodered-home-assistant-activate-scene-with-specific-application/44647/2 "2021-04-24T14:40:55Z")

I don't use HA but if you can share the activated app plus the shield status to Node-Red you can then use switch nodes in parallel to activate the flow when the shield is turned on and playing. Then use a switch node to filter to the aps that you want to dim the lights for. Finally attach those outputs to a change node to set your dim level and send that back to HA to dim your lights. ---

**Author:** ![cranx](https://avatars.discourse-cdn.com/v4/letter/c/a587f6/32.png) [@cranx](https://discourse.nodered.org/u/cranx)\ **Post date:** [29 April 2021 14:01 UTC](https://discourse.nodered.org/t/nodered-home-assistant-activate-scene-with-specific-application/44647/3 "2021-04-29T14:01:45Z")

Well, that's the thing, in node-red I can only see if the Shield is playing/paused/off as far as I know. But in HA I can see also what App is running but I don't know how I can see this in node-red. ---

**Author:** ![rgerrans](https://avatars.discourse-cdn.com/v4/letter/r/2bfe46/32.png) [@rgerrans](https://discourse.nodered.org/u/rgerrans)\ **Post date:** [30 April 2021 01:31 UTC](https://discourse.nodered.org/t/nodered-home-assistant-activate-scene-with-specific-application/44647/4 "2021-04-30T01:31:34Z")

Can you push the app playing to an MQTT broker as another way to transfer it to Node-Red? Otherwise maybe another node that you can push through a variable value of the app running ---

**Author:** ![jemmail](https://avatars.discourse-cdn.com/v4/letter/j/e8c25b/32.png) [@jemmail](https://discourse.nodered.org/u/jemmail)\ **Post date:** [30 April 2021 08:33 UTC](https://discourse.nodered.org/t/nodered-home-assistant-activate-scene-with-specific-application/44647/5 "2021-04-30T08:33:26Z")

How do you link your Nvidia Shield to HA ? ---

**Author:** ![cranx](https://avatars.discourse-cdn.com/v4/letter/c/a587f6/32.png) [@cranx](https://discourse.nodered.org/u/cranx)\ **Post date:** [30 April 2021 09:10 UTC](https://discourse.nodered.org/t/nodered-home-assistant-activate-scene-with-specific-application/44647/6 "2021-04-30T09:10:16Z")

As a Google Cast device. ---

I've to look into this, thanks for pointing it out! ---

**Author:** ![rgerrans](https://avatars.discourse-cdn.com/v4/letter/r/2bfe46/32.png) [@rgerrans](https://discourse.nodered.org/u/rgerrans)\ **Post date:** [2 May 2021 13:36 UTC](https://discourse.nodered.org/t/nodered-home-assistant-activate-scene-with-specific-application/44647/8 "2021-05-02T13:36:21Z")

NP. I switched from dedicated hub nodes to MQTT and never looked back-back. Made it super easy when I switched from OpenHab to Homeseer and allowed me to integrate in some other independent components. ---

**Author:** ![cranx](https://avatars.discourse-cdn.com/v4/letter/c/a587f6/32.png) [@cranx](https://discourse.nodered.org/u/cranx)\ **Post date:** [3 May 2021 13:27 UTC](https://discourse.nodered.org/t/nodered-home-assistant-activate-scene-with-specific-application/44647/9 "2021-05-03T13:27:20Z")

I see, but I'm not planning to switch platform any time soon so more looking for a permanent solution. ---

**Author:** ![rgerrans](https://avatars.discourse-cdn.com/v4/letter/r/2bfe46/32.png) [@rgerrans](https://discourse.nodered.org/u/rgerrans)\ **Post date:** [4 May 2021 20:52 UTC](https://discourse.nodered.org/t/nodered-home-assistant-activate-scene-with-specific-application/44647/10 "2021-05-04T20:52:33Z")

Sorry, that was just an extra benefit. It's more that by using a neutral approach it's easy to integrate in other pieces as needed and gives you more flexibility ---

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\ **Post date:** [3 July 2021 20:52 UTC](https://discourse.nodered.org/t/nodered-home-assistant-activate-scene-with-specific-application/44647/11 "2021-07-03T20:52:37Z")

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