Using the rbe (report by exception) node & Scaling input with the range node

To test the flow, deploy this flow and then return to the HiveMQ page and send a series of messages. Firstly, you’ll need to set the analyze value to true so that the switch node sends through a message on output 1. If you use the original message value of 6, this will fail to pass the rbe node. If you then send a second message of value 10, the  rbe node  will evaluate the difference between 6 and 10, see it is greater than 20%, and send on a message to the final debug node

{"analyze": true , "value": 10 }

{"analyze": true , "value":  5 }

5 , 10  greater than 20%,

Let’s assume you want to scale your value (originally in the range 0-10) to a range (0-255) when you aren’t doing any analysis. This means we are dealing with the lower part of the flow fired when the switch node evaluates the Analyze property as false.

Then return to the HiveMQ test page and post {“analyze”:false, “value”:10} as a new MQTT message to the same topic.

{"analyze": false , "value": 10 }

{"analyze": false , "value":  5 }

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