How to get msg value when configuring node?

General
1

Hi all, it will be my first post, so ... GREETINGS !

I need to know how to read values from msg.payload in nodes' configuration. There is my simple flow

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In function node I have very, simple code

msg.payload = {
    "test": "32",
    "blabla": "15"
};
return msg;

And question is. How use msg.payload.blabla in this below configuration field

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2

You haven’t told us what contrib-node you are using.

But next to
Data there is 🔻{} does clicking here give you any other options?

3

This is the 'call service node' from 'home assistant' pallette. When i click on this button i have thatClipboard03

4

Unfortunately your description doesn’t help track it down.
You installed something, most probably called node-red-contrib-XXXXX

If you look on flows.nodered.org there are 4 with home assistant in the title.
https://flows.nodered.org/search?term=home+assistant&type=node

5

I think it depends on if the author has written his node to pass msg through to the configuration node internals and specifically processes msg for that data property

In other words, it might not be possible.

In the JSONata expression, you could try....

  • Accessing payload without msg.
  • Accessing flow or global context vars (set before call to node)
6

Did A quick search for that node and I think I found the right one.

The source code shows there is help info built in to the config node (open the config node and view the info side bar).

The info says


    <dt>payload.data<span class="property-type">JSON | string</span></dt>
    <dd>Overrides or sets the data/params property of the config.</dd>

So it would seem if you send ...

msg.payload = {
    "data": {
       "test": 33
    }
};
return msg;

You won't need to put anything into the config node data field at all (it should pick up the data object in payload automatically.

Also, reading the source, it is my suspicion the JSONata expression doesn't require msg. part to access payload.

7

You have got right. I modified function node to that and its works

msg.payload = {
    data: {
        "temperature":"22"
    }
};
return msg;
8

Hi,

Is it possible to pass multiple entities?

msg.payload = {
"data":{
"temperature": 22,
"entity_id": (
"climate.danfoss_z_thermostat_014g0013_heating_1_8",
"climate.danfoss_z_thermostat_014g0013_heating_1_4"
)
}
}
return msg;

9

Yes, It is possible

msg.payload = {
"data":{
"temperature": 10,
"entity_id":
"climate.danfoss_z_thermostat_014g0013_heating_1_8, climate.danfoss_z_thermostat_014g0013_heating_1_4"

}

}
return msg;

10

Just in case you wanted an array and not one long string for entity_id

msg.payload = {
"data":{
"temperature": 10,
"entity_id":[
"climate.danfoss_z_thermostat_014g0013_heating_1_8","climate.danfoss_z_thermostat_014g0013_heating_1_4"
]
}
};
return msg;