None except for your raspberry pi already setup.
- Start Node-Red by clicking on the red Node-Red icon on the start menu under the “Programming” section.
Starting web browser Node-Red interface:
- Start the Chromium web browser by clicking on the blue world icon on the top bar.
- Click on the “Node-Red” link inside Chromium on the bookmarks bar.
Programming Hello World! example:
Drag an inject node into your flow from the left node palette.
Double click on the inject node (named timestamp once dragged in) and change data type to “string”
Type “Hello World!” into the Payload section just after the “string” datatype selector.
Drag in a Debug node from the output node palette.
Drag a connection line between the output of the inject node and the input of the debug node – click on the dots on the sides of the nodes to do this.
Deploy your new flow
Click the button on the left of the Inject node.
Click on the “debug” tab on the right side – the icon looks like a bug 😉 You should see your “Hello World!” string displayed
Inject and debug nodes will be used extensively throughout our other lessons and are the building blocks of understanding how JSON messages are sent between nodes.
Why not try connect an RGB LED to the IO pins now that you know the basics!