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

Node-RED

Node-RED Forum

Add two numbers

FAQs

dceejay 24 May 2018 16:15 3

Does this thread help ? Deduct old payload from new payload

Topic		Replies	Views
Adding 2 Msg.payloads numbers Dashboard	6	14530	27 December 2021
Calculate with function node General	4	557	21 January 2023
Function node - simple addition of two values General	7	4316	25 April 2021
Function not working after update General	5	1650	18 January 2019
Adding a payload to a varible General	4	474	10 July 2020

Copyright OpenJS Foundation and Node-RED contributors. All rights reserved. The OpenJS Foundation has registered trademarks and uses trademarks. For a list of trademarks of the OpenJS Foundation, please see our Trademark Policy and Trademark List. Trademarks and logos not indicated on the list of OpenJS Foundation trademarks are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.

Add two numbers

Related topics