Hello. I find myself in a situation that I can’t resolve. I need to add two numbers, msg.pid and msg.temperature, I have tried a function in all the ways I know and never get the result. Could someone please provide me with the necessary code? Thank you very much.

@underpop okay - so it looks like msg.pid and msg.temperature are actually different messages - they are not two properties on the same message object. The Function node is run each time a message arrives. So it will be run when the msg with pid arrives, and it will be run again when the msg with t…

Hi @underpop can you share some of what you’ve tried? It’s hard to say where you may be going wrong if you don’t show us anything. If those two properties are numbers, not strings, then you can do: msg.payload = msg.pid + msg.temperature; return msg; This code assumes you want the result of the …

It doesn't work. The result is NaN. Here's a snapshot of the flow: [image] [image]

I’t works. Now i understand my error. Thank you very much!

By the way, if you are doing PID control you might like to look at https://flows.nodered.org/node/node-red-contrib-pid

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Add two numbers

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dceejay 24 May 2018 16:15 3

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Add two numbers

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