I'm having trouble getting a value from a Microhard Bullet into VTSCADA from my mosquitto broker, I am trying to get the value of temperature,

{
  "file_format_version" : "3.1",
  "main" : [ {
    "temperature" : "43.27",
    "voltage" : "12.48",
    "uptime" : "1120074",
    "devicetime" : "2022-03-16 14:38:10 MDT"
  } ],

I am using the default decoder and the address I'm trying is

Microhard++main.0.temperature

Any advice to get me going in the right direction would be appreciated

Have you tested:

Microhard++main[0].temperature
----
Microhard/++main[0].temperature

I just created a dummy broker and tested it successfully using

rdstopic/++main[0].temperature

As a note, I did need to update the JSON format from your post to the following:

{
    "file_format_version": "3.1",
    "main": [{
        "temperature": "43.27",
        "voltage": "12.48",
        "uptime": "1120074",
        "devicetime": "2022-03-16 14:38:10 MDT"
    }]
}

Dave,

That worked for me. I used;

Microhard++main[0].temperature

Thank you for your help