Hi, i just want to add these two values: [grafik] I changed the topic: var temp = (msg.payload[1]) msg.payload = temp; msg.topic = "P1" return msg; but no matter what I do, it doesn't want to add in a function node.

Here is my complete post again - try it & see where you get to... Hi again, as mensioned earlier, this is how you can do it with buffer parser... [image] (obviously I dont have your invertor so all values are simulated - zero) this is the flow i did... [{"id":"3c70a20c.01d53e","type":"inject"…

Adding two values

General

Colin 12 September 2020 16:52 2

I don't see where you are attempting to add them. If you are trying to add the values from two separate messages then you have to first combine the two messages so that you get both values in one message. See this example in the cookbook https://cookbook.nodered.org/basic/join-streams

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Adding two values

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