Complete Node in Node Red

Complete Node in Node Red

In this post i will share ,how to use  Node Red Complete Node

A Complete Node can be use to monitor execution of specific line of a node.

When the node Monitor by a Complete node has  completed execution , it will pass the msg.payload  from the monitored node to the Complete Node.

after that ,User can use the Complete Node to trigger other process.


Lets Build the Complete Node

Step 1

We Will build the Node to be Monitored by Complete Node.

Drag out  an inject node and configure as below

Step 2

Build the Count and Trigger Node

Drag out the Function Node and paste the Code below inside the Function Node at the On Message Tab Area.

There  are 2 component s. the interval function will keep adding count by 1000 ( 1 Second )

While the SetTimeOut  , parameter is set to  5000 ( 5 Second ) to time out . In the SetTimeOut  function , first it will clear the Interval  , update the node Status , update the lastest node count to payload.



var count = 0;
// Start counting
var interval = setInterval(function() {
    node.status({ text: ‘Count: ‘ + count });
}, 1000); // Count every 1 second
// Trigger message after 5 seconds
setTimeout(function() {
// Clear the Interval
// Update the Node Status UI when Counting
    node.status({ text: ‘Message triggered!’, fill: ‘green’, shape: ‘dot’ });
// Send the Node Count
    node.send({ payload: count }); // Send the count as the payload
    node.done(); // Mark the current node as complete
}, 5000);
return null;



Step 3

Drag Out  Debug Node , and joint all 3 Nodes as below

Step 4

Drag out the Complete Node , configure as below


Step 5 

Drag out the Function Node  and paste the code below into the function node on message tab .

This Function node will get the msg.payload value from the  “Count and Trigger ” Function  passed to Complete Node


var count = msg.payload;
msg.payload = “Count completed: ” + count + ” seconds”;
return msg;

Step 6

Drag out the debug node and joint the node as below , Trigger the Inject Node and observe the result



Check out  how to declare global Variable in Node Red


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