JSON Parse MQTT

Questions
#1

Hey there,
Is there a way of combining the payload of multiple object’s into one single JSON (or equivalent) String in order to only have one message sent? I also would need to read that string back in order to assign the values to my object’s after they got modified on another device?

Kind regards
CrunkFX

#2

You’ll probably need to use MQTT in Plugin to accomplish this. I don’t think you can do that with that default stand-alone MQTT Client.

#3

So, i worked myself into the Plugin, got it working also with the automatic Broker switching if one is not reachable. Now i want to pack all attributes of my device into one JSON String. I get it to work with the actual changed values but how can i send all values from the attributes of my device?

This is my actual Code to send the Values:

function onChangeRequest(device, attribute, value) {
switch (device.Id) {
    case "1":
        mqtt.publish("/AstoriaTest/ok", "{" + "\"deviceId\":\"" + device.Id + "\"," + "\"attr\":\"" + attribute + "\"," + "\"value\":\"" + value + "\"}");
        break;
    }
}

In your MQTT Example you used
$HomeRemote.Attribute.Value
But that doesn´t seem to work in the JS Plugin, as it says “$HomeRemote not found”

Thanks
CrunkFX

#4

The device parameter is your actual Device. It has all of your attributes. In that code snippet you shared, you are using device.Id in your payload. Including an additional property/attribute is no different. Say you have a Switch attribute, you can access it like this device.Switch or device.Attributes["Switch"]

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#5

Wow I could have thought of this myself. Thanks, sometimes you just need a little push into the right direction.

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