Hi everyone. I'm trying to show the output from two inputs (facial expressions). These two inputs will have different values from 0-100. Thus, I use the switch node to differentiate if it is larger than 80 or not and then use the change node to display the message. The two change nodes will be joine…

I added the debug node with the output of the change node but there is still no message displayed. Is the msg.topic and msg.payload will affect the debug message?

if (msg.payload.clench = 0 ) { msg.payload = "clench signal"; } else if (msg.payload.frown = 0) { msg.payload = "frown signal"; } There is flaw what in programming called "assignment in conditional expression". To understand it better take a little lesson: https://www.w3schools.com/js/js_…

Thank you for your correction. I've changed the code but there is still no output message displayed. BTW, node-red suggest me to use "===" to compare with 0. Which is the right way? "==" or "==="?

Seems you haven't read the provided links as it is explained there :slight_smile:

Ohh.. I'll read it then. Sorry because I'm trying to find out the error.

You will find it if you understand it. Not before.

I've changed my flow. I used the switch node and change node and connecting with the function node. [{"id":"73f9235a.d2b04c","type":"tab","label":"Flow 7","disabled":false,"info":""},{"id":"d8fcbd7d.fef46","type":"EMOTIV","z":"73f9235a.d2b04c","name":"EMOTIV","x":60,"y":420,"wires":[["f40d8a53.8ecc…

What is your debug node '1' showing are the values of msg.payload.from and msg.payload.clench?

Yes, they are the values that larger than 40.

Enable that debug node and show us what you get in the debug window.

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Display output message

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Sin 2 March 2019 21:56 38

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Display output message

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