Import Temperature Information from Shelly Plus 2PM, build Thermostat in Red Node

General
,
1

Hi, my name is Mountain and I'm pretty new to red node, nevertheless I managed to get most of my planned functions working. I am running a Victron Multiplus II GX system and want to use Shelly to automize various functions. For instance: after battery SOC has reached a certain level then use boiler heater; additional: heat up water boiler every night until the water has reached a certain temperature level. For this, a PT100 temperature sensor attached to the Shelly Plus 2PM is used.

What I managed to do: Get Information from Shelly into red node. I tried two methods and both work:
a) via http request: http://192.168.1.60/rpc/Temperature.GetStatus?id=100. What I get in return is :

21.4.2025, 08:16:22
[node: debug 16](https:// 752533-nodered.proxyrelay7.victronenergy. com/#)
msg.payload : string[33]
"{"id": 100,"tC":57.9, "tF":136.3

But then I am stucked how to proceed with this information. How do I transfer this string into a format that I can used it with a red node switch?

b) other method: I downloaded the palette library for shelly and integrated it into my canvas. The connection works and I get back the full information from the respective shelly

21.4.2025, 08:19:47[node: Eingangsobjekt](https:/ /762522-nodered.proxyrelay7.victronenergy.com/#)
msg.payload : Object
object
ble: object
cloud: object
input0: object
input1: object
mqtt: object
switch0: object
switch1: object
sys: object
temperature100: object
id: 100
tC: 57.9
tF: 136.3
wifi: object
ws: object

Same issue here: how to proceed.

Can someone please support me and tell me how do I build a thermostat with this information? I am a bloody beginner and have now jason script knowledge. There a plenty of videos on YT how to use the relais for Shelly with red node (I also managed this easily) but not how to work with the temperature.

Thank you for all how could help here.

2

Set the http request node to return a parsed json object then the tC would be in msg.payload.tC

There’s a great page in the docs (Working with messages : Node-RED) that will explain how to use the debug panel to find the right path/value for any data item.

Pay particular attention to the part about the buttons that appear under your mouse pointer when you over hover a debug message property in the sidebar.

BX00Cy7yHi

3

Great, that helped a lot! Now it's working!

Thank you for this. Have a great day!

In case anybody with the same issues: This is how it worked for me:

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                "vt": "date"
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        "name": "",
        "method": "GET",
        "ret": "obj",
        "paytoqs": "ignore",
        "url": "http://192.168.1.60/rpc/Temperature.GetStatus?id=100",
        "tls": "",
        "persist": false,
        "proxy": "",
        "insecureHTTPParser": false,
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        "id": "25d58ebbcf35ec6d",
        "type": "change",
        "z": "5c369023262af9fe",
        "name": "payload.tC",
        "rules": [
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                "t": "set",
                "p": "payload",
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                "to": "payload.tC",
                "tot": "msg"
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        "wires": [
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        "type": "switch",
        "z": "5c369023262af9fe",
        "name": "",
        "property": "payload",
        "propertyType": "msg",
        "rules": [
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                "vt": "str"
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