====Create a ModelHost Service====

To make your AI run live, you'll need a few extra things.

The [[https://ardi.com.au/downloads/capturemodel.zip|extra scripts]] in Python, and a **binding file** that tells ARDI how to connect live data to some of the parameters of your model.

===Binding File===

The //binding file// is a simple JSON file that describes what ARDI data points each of your AI inputs should be connected to, as well as an optional 'map' that describes how values should be translated from numbers to strings.

For example, our Bakery Demo includes a **Browning and Rise** predictor that predicts how well cupcakes will rise and how brown the top surface will be, based on the current product type and machine setup.

You can see the example [[https://demo.optrix.com.au/s/default/capture/usemodel?name=batches&model=browning_and_rise|here]].

It takes several parameters, including...

^Name^
|Flavour|
|Size|
|Mixin|
|Browning Zone.Temperature - Oven|
|Rising Zone.Temperature Oven|

The attributes with periods (.) are already being sourced from ARDI. However, the attributes without them (such as Flavour, Size and Mixin) will use a constant value unless you specify where to find them in your ARDI server.

===Example File===

<code javascript>
{
    "mixin": "Bakery.Mixin",
    "size": "Bakery.Size",
    "flavour": "Bakery.Flavour",
    "filling": "Bakery.Filling",
    "mixin_map": {
        "0": "None",
        "1": "Choc-Chip",
        "2": "White Choc-Chip",
        "3": "Berry"
    },
    "size_map": {
        "0": "Small",
        "1": "Medium",
        "2": "Large"
    },
    "flavour_map": {
        "0": "Vanilla",
        "1": "Chocolate",
        "2": "Strawberry",
        "3": "Lemon",
        "4": "Caramel"
    },
    "filling_map": {
        "0": "None",
        "1": "Choc Fudge",
        "2" :"Creme",
        "3": "Caramel"        
    }
}
</code>

Here's the complete binding file. It contains both the basic bindings (ie. "size" should be loaded from "Bakery.Size") and mappings, so that a value of 0 for flavour will be translated into the text 'Vanilla'.

===Installing Dependencies===

If you want to run this service on a local machine, you might need to install some additional Python libraries. The names of these libraries are included in the 'morerequires.txt' file inside the 'extra scripts' download earlier.

===Setting Port Number and Name===


===Running the Model===

Decompress the extra files into the folder with your .keras and .json files.

Edit the **model.py** file and update the model name (search for '@mdl.part'). You might also want to change the port number the OPC-UA server runs on, which can be found in the opening line of the file (the default is '5555').

You can then run the 'model.py' script.

On a Linux terminal, write 

<code bash>
python3 model.py
</code>

Or on Windows Command Prompt, write

<code bash>
c:\python314\python model.py
</code>

The model will be available via OPC-UA on port 5555 by default.

===Running Continually===

If you're happy with your model, you might want to have it always running. See [[general:python_services|this section]] for advice on making your ModelHost script run in the background.