Node-Red - Basic Nodes & Uses

This lesson focuses on the following Key Areas

• How to use Inject Nodes to perform the following

  • Inject different data types

  • Use Inject Nodes to influence an active flow

The lesson also explains the configuration options for the Inject Node

This lesson focuses on the following Key Areas

• How to use Debug Nodes

  • The different configurations of Debug Nodes

  • Example of a JSONata Debug Node

This lesson focuses on the following Key Areas

• Event Handing

  • How to use Complete nodes to monitor for an event

  • How to use Catch nodes to monitor for an error and catch it before it stops flow execution

  • How to use Status nodes to monitor status changes

This lesson also contains a larger worked example

This lesson focuses on the following Key Areas

• Joining Data

  • Joining different msg objects together into arrays and objects

  • Manually joining

  • Automatically joining

• Splitting Data

  • Splitting data and manipulating

  • Rejoining data after splitting

• Batching Data

  • Batching multiple messages into groups and releasing all messages as a batch

This lesson also contains a worked example of splitting data, manipulating that data and rejoining that data after.

This lesson focuses on the following Key Areas

• The "Exec Node"

  • Using this node to run outside commands through the command line

This lesson also contains a worked example of pinging an IP address and displaying results in Node-Red

This lesson focuses on the following Key Areas

• Node-Red-Contrib-Moment Node "Moment"

  • An externally supplied node that is extremely useful in Node-Red for time formatting

  • How to format time

  • How to add / subtract time

  • How to offset timezones

This lesson focuses on the following Key Areas

• Parsing CSV formats

  • How to read and write information from/to a CSV format

• Parsing HTML formats

  • How to scrape an external website's HTML document for information

• Parsing XML formats

  • How to read and write information from/to an XML format

• Parsing JSON formats

  • How to read and write information from/to JSON format

• Parsing YAML formats

  • How to read and write information from/to YAML format

This lesson also contains a very large example of scraping a HTML website for information. It's advised that students download the resource material after completing this lesson and examine this flow for themselves to help achieve a better understanding of the flow

This lesson focuses on the following Key Areas

• Reading information from a file

• Writing information to a file

• Watching files for changes

• Watching directories for changes

• "Tailing" a file for the most recent additions to that file

This lesson focuses on the following Key Areas

• Writing to an SQL Database

• Reading from an SQL Database

Note: This is not mentioned in the video tutorial - The package that contains the mySQL node is "Node-Red-Node-mySQL" and can be download in the palette manager's install area

This lesson focuses on the following Key Areas

• Additional Learning

  • Using Functions as Smart Debug tools

  • IF and FOR statements in Javascript

  • Creating Sub Flows

  • Grouping Nodes

  • Configuring Groups to "Prettify" your flow