Extracting Values from SONOS Message

[Simon Schmid]

Hello, i'm pretty New to Node-red functions, but couldn't find a soulution for that.

But i'm pretty shure it's pretty basic stuff:

From the SONOS Node i get the object:

msg : Objectobject

_msgid: "abea4022.ca2cf"

topic: ""

payload: "01 De Zaubertrak"

track: object

title: "01 De Zaubertrak"

artist: "Globi"

album: "Globi bei den Kelten"

albumArtURI: null

position: 190

duration: 200

albumArtURL: null

uri: "x-file-cifs://melon.local/iTunes/iTunes/iTunes%20Media/Music/Globi/Globi%20bei%20den%20Kelten/01%2001%20De%20Zaubertrak.mp3"

queuePosition: 18

volume: 23

normalized_volume: 0.23

state: "playing"

muted: false

I want to extract values like Title, Artist, albumArtURL (bad example here) and Volume to Display it on the Dashboard.
I start simple with the Volume value, like this, but with no success:

var msg = msg.volume;
return msg;

I get the Debug Error: function : (error)"Function tried to send a message of type number"

Can you help me how to get from the above Object a function node with 4 msg outputs to display the values.

[Mark Setrem]

There are a couple of pages in the docs that should help you...

1) https://nodered.org/docs/user-guide/messages - explains how to work with messages 

2) https://nodered.org/docs/writing-functions - explains how to send multiple messages

The other thing that you need to do is work with objects rather than variables.

In general Node-RED uses msg.payload for the "important" piece of info.  So in your example you would do

msg.payload = msg.volume;
return msg;

[steve rickus]

Simon,

If all you need to do is extract the value of a field like msg.volume, it's simpler to use a change node to "Set:" msg.payload "to" msg.volume (or whatever field you want). Just make sure to use the "msg." pulldown option and type in the property name "volume" (don't type msg.payload into the "AZ" string option).

[Simon Schmid]

Thank you Guys I had first sucess and for the valies in an integratet object it was msg.track.title. it's pretty cool!

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[Joe Morris]

Simon, Are you working with the new Sonos API?