How to publish MQTT Sparkplug B message

General
1

Hi there,

I'm trying to publish a Sparkplug B message from node-red, but I don't get how I'm supposed to do that. This is my flow:

image

msg.topic = "spBv1.0/namespace/group/device/edgeNode/sensor1";
msg.payload = {
    "bn": "sensor1/",
    "n": "value",
    "t": 1,
    "v": Math.random() * 100
};
return msg;

But, the output I get in the debug is this:
image

2

I'm very new to sparkplug but this works for me

let seq               = flow.get('seq') || 1
msg.topic             = "spBv1.0/FactoryA/DDATA/ProductionLine03/dev04a"
msg.payload           = {}
msg.payload.timestamp = new Date().getTime()
msg.payload.seq       = seq
msg.payload.metrics   = [
        {
            "name": "externalTemperature",
            "value": 14.1,
            "type": "Float"
        },
        {
            "name": "humidity",
            "value": 88,
            "type": "UInt16"
        },
        {
            "name": "pressure",
            "value": 77,
            "type": "UInt16"
        },
        {
            "name": "temperature",
            "value": 22.2,
            "type": "Float"
        }
    ]
seq++
flow.set('seq',seq)
return msg
3

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