How to Use Catenis Flow Nodes

In this quick tutorial, we will cover How to Use Catenis Flow Nodes. The Catenis Flow node palette can be used with the core Node-RED nodes to build your own blockchain applications.

In this video we will cover:

• Launching Node-RED in your terminal
• The node’s properties
• Sending a simple parameter or a JSON Object
• What is a JSON Object
• Catenis Flow’s help section

Prerequisite

• A Catenis Development or Production account
• Node-RED installed on either a local or cloud environment
• Catenis Flow Pallet installed on Node-RED
• Basic understanding of how to use Node-RED

Once you know how to use the Catenis Flow nodes, you are all set to move on to the other videos in this tutorial series.

After watching How to Use Catenis Flow Nodes, watch the next video, Getting Help for Catenis Flow Nodes, to further expand your knowledge.

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Links from this video for easy access:

• Installing Catenis Flow on Node-RED: https://blockchainofthings.com/tutorials/install-catenis-flow-node-red 
• Understanding the Log Message Node: https://blockchainofthings.com/tutorials/understand-log-message-node
• Getting Help for Catenis Flow Nodes: https://blockchainofthings.com/tutorials/get-help-for-catenis-flow-nodes

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Hi, this is Clara for Blockchain of Things.

Today, we will cover how to use Catenis Flow Nodes.

The Catenis Flow Node palette can be used with the core Node-RED Nodes to build your own blockchain applications.

If you haven’t installed the Catenis Flow palette into Node-RED, check out our previous video at this link:

Then come back to this video.

If you are running Node-RED locally on your Mac or PC, first open your terminal and launch Node-RED.

Copy the server address and paste it into your browser.

To view or edit a node’s properties,

first, drag-and-drop a CatenIs Flow Node to the workspace, then double-click on the node and a slide-out panel will appear exposing the node’s properties.

Most nodes require additional input

which can be passed to them via simple
parameters or JSON objects.

Because these inputs are dynamic,

many of them are not included in the slide-out properties panel of the Catenis Flow Node.

JSON, or Javascript Object Notation is a standard way of passing input to Node-RED and Catenis Flow Nodes.

JSON is often used by web APIs to send and receive data.

In many cases a simple string or number
parameter will suffice for a node.

However, a JSON object will allow you to pass
in more robust configuration information

and override a node’s default configuration.

Note, that inputs injected into Catenis Flow Nodes containing alternate node properties

will override the properties set on the node’s
slideout properties panel.

When sending a simple parameter type, the type will be listed under the node help section in the information tab,

which can be accessed here in the sidebar.

For example, this Log Message Node states
that a string input can be sent.

For more details, watch our next video titled “Getting Help for Each Catenis Flow Node”

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