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      • 1. Creating a Page
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      • 4. Adding Data to Gauge Nodes
      • 5. Adding a Chart Node
      • 6. Adding Data to Chart Node
      • 7. Adding a Template Node
      • 8. Adding Data to Template Node
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  1. Example Projects
  2. Getting Started with Node-Red Dashboard

6. Adding Data to Chart Node

Previous5. Adding a Chart NodeNext7. Adding a Template Node

Last updated 4 years ago

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Next, we will populate the chart with data from two different motors. Similar to our example in , we will insert an inject node and a function node and connect them to each other.

Double-click on the function node and copy the following code

var msg = {};
var msg1 = {};

msg.payload = Math.round(Math.random()*1000)+500;
msg.topic = 'Motor 1 RPM';

msg1.payload = (Math.round(Math.random()*1000)+1000)*2;
msg1.topic = 'Motor 2 RPM';
return [msg, msg1];

and change the name to 2 Motors RPMS , and the output to two. This will allow you to output two different outputs into your chart node.

Click Done once the function is complete.

We will use the inject node to trigger this function every 3 seconds. To do this, double-click on each inject node and change the following parameters.

Click Done after parameters are set.

Ensure that both outputs of the function node are connected to the chart node.

adding data to our gauge nodes