Exercise - Create the coffee machine device template
To create a device template, you can either build it from scratch in the IoT Central UI, or get started by importing a device capability model.
Recall that in the IoT enabled coffee machines example, you'll connect a coffee machine simulator to IoT Central for monitoring telemetry such as water temperature and humidity, observe the state of the machine, set optimal temperature, receive warranty status, and send commands.
Here, you'll create and publish the Connected Coffee Machine device template defined in the device capability model.
Create a device template
The Sample code for Azure IoT Central Documentation GitHub repository contains the sample code. Copy the JSON from iot-central-docs-samples/main/monitor-manage-device-with-iotcentral/CoffeeMaker.json and save it on your local machine in a file called CoffeeMaker.json. This JSON is the device capability model for the coffee machine.
Browse to the URL for your IoT application that you created in the previous exercise, such as
https://coffee-maker-1234.azureiotcentral.com.Select the icon for Device templates on the home page of your Azure IoT Central application, and then select + New.
On the Select type page, select the IoT device tile, and then select Next: Customize.
On the Customize page, enter Connected Coffee Machine as the device template name, then select Next: Review, and then select Create.
On the Create a model page, select the Import a model tile.
Browse to the CoffeeMaker.json file you created previously, and select Open.
IoT Central displays the Connected Coffee Maker capability model that defines the telemetry, properties, and commands that the device supports.
Add views to your template
To create a view that lets you visualize the telemetry from your coffee machine:
Navigate to the Connected Coffee Machine device template you created, and select Views.
Add a new Visualizing the device view called Telemetry.
Select Start with devices and add the following tiles:
Select Cup Detected in the Telemetry category and then Add tile. Change the tile visualization to Last Known Value and size to 2 x 1.
Select Brewing in the Telemetry category and then Add tile. Change the tile visualization to Last Known Value and size to 2 x 1.
Select Water Temperature and Air Humidity in the Telemetry category and then Add tile. Change the tile visualization to Line chart and size to 2 x 2 then select Edit. Change Title to Telemetry and confirm the Display range is set to Past 30 minutes. Select Update.
Select Water Temperature in the Telemetry category and then Add tile. Change the tile visualization to KPI and size to 1 x 1 then select Edit. Change Title to Water Temperature and select Past 12 hours in Time range. Select Update.
Select Air Humidity in the Telemetry category and then Add tile. Change the tile visualization to KPI and size to 1 x 1 then select Edit. Change Title to Air Humidity and select Past 12 hours in Time range. Select Update.
Save your changes.
To create a view that lets you manage the properties of your coffee machine:
Navigate to the Connected Coffee Machine device template you created, and select Views.
Add a new Editing device and cloud data form called Properties.
Select both the Optimal Temperature and Device Warranty Expired properties and the Coffee Maker Min Temperature and Coffee Maker Max Temperature cloud properties, and then select Add section.
Save your changes.
Publish the Coffee Machine template
Before you can connect a coffee machine device to your IoT Central application, you need to publish the Connected Coffee Machine device template:
Navigate to the Connected Coffee Machine device template you created, and select Publish.
The Publish this device template to the application shows you the changes that you're publishing. Select Publish.
Check your work
Verify that the device template was published and is ready to use:
Navigate to the Devices page in your Azure IoT Central application.
Check that the Connected Coffee Machine device is in the list of available device types:
