Working with the List Message Node in Run Time Mode

In this quick tutorial, we will cover “Working with the List Message Node in Run-Time Mode”. This video goes through a step-by-step guide on how to implement your own flow that shows you how the List Message Node functions in Run-Time Mode.

In this video we will cover:

• Building a List Message Node flow
• Running the flow to see its results

Prerequisite

• A Free Catenis Development account or Production account
• Node-RED installed on either a local or cloud environment
• Catenis Flow Pallet installed on Node-RED
• A Catenis Virtual Device configured on Node-RED
• Basic understanding of how to use Node-RED
• Basic understanding of how messages work in Catenis

Thank you for watching Working with the List Message Node in Run-Time Mode in the Catenis Flow tutorial series. Watch the next video, Working with the List Message Node in Interactive Mode, to further expand your knowledge.

Links from this video for easy access:

• Understanding the List Messages Node: https://blockchainofthings.com/tutorials/understand-list-messages-node
• How to Configure a Virtual Device: https://blockchainofthings.com/tutorials/configure-virtual-device
• Working with the List Message Node in Interactive Mode: https://blockchainofthings.com/tutorials/work-with-list-msg-node-IM

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[Music]

Hi, this is Clara for Blockchain of Things.

In this tutorial, we’ll create a flow containing the List Messages Node in Run-Time Mode

If you don’t know what a List Message Node is, make sure you check out the previous video titled “Understanding the List Message Node”.

Let’s jump right in.

Drag-and-drop a List Messages Node into the Node-RED workspace.

Double-click it to display its properties slide-out panel.

On the device drop-down field of the properties slide-out panel,

choose your Catenis Virtual Device.

Add the node’s configuration information, based on your needs to each field.

Wire this node to a Debug Node and open the Debug Sidebar.

Next, drag-and-drop an Inject Node, to the Node-Red workspace.

Wire the Inject Node, to the List Messages Node.

Then double-click the Inject Node to open its properties slide-out panel.

Select the drop-down payload field, and choose the JSON type.

An ellipse button will appear to the right of the field.

Click this ellipse button to display a JSON edit box.

Enter the JSON information you wish to pass as input to the Catenis Node.

For example, something like this:

Click the done button.

Then click the done button again to exit the properties dialog box.

Click the red deploy button to deploy this flow.

Now, let’s test the flow.

Click the button on the left of the Inject Node to send the input from the Inject Node through the flow.

The Debug Sidebar should display the returned JSON object

containing the API call results to the right side of the workspace.

Great work!

Now, that you know how to create a flow using the List Messages Node in Run-Time Mode,

it’s time to move on to our next tutorial,

where you’ll learn how to use this node in Interactive Mode.

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