So sorry for the noob question, pretty new in node red, but please help! I have 2 incoming items which reports stats, I would like to compare these 2 values and then outputs the msg.payload to a single string say ON or OFF or ignore them all. I've already try this, not working at all: [{"id":"dd0…

Persisting some data in node/flow/global context is one way to "hold" information for use at a later point in time, or within another node in the same Editor "tab" (using flow context), or any other node (using global context). Other techniques for doing the same thing are writing/reading a file, us…

Thanks man, already read the doc, I know there must need to write "flow.set" kind of thing but I just so noob and don't understand how to write the codes T_T

There are lots of tutorials for javascript programming, which will give you a basic understanding, as well as several introction tutorials to Node-RED available on line a little googling should help you get started

Kevin, You are close to a solution... you have used the join node to put the two values you want to compare into a single msg object, with this structure: { "payload": { "idbool": true, "idswitch": "OFF" } } However, in your javascript function code, you are trying to test…

Thank you so much man for helping a noob like me. It's working, however I would like to ask another noob question: So there is no need to "persist" or "store" the previous/current stats for both the "incoming" node? (because of the join node?) What if one of the "inject node"(will replaced with mq…

Thank you sir, loud and clear answer to me! It's now working like a charm!

I was looking for that exact solution, so thank you! However, I'm stuck with the "Join" node I get "Cannot merge non-object types" When I look at the debug of each of the inputs to the join node they appear to me to be objects: {"socketid":"T5B2DdNozyaprJ1YAAAA","_msgid":"acc6ced8.21113","aktiv"…

I don't know why it would show that error, but I notice that you have told it to combine each msg.payload, but the first one hasn't got a payload property. I also note that you have not told it when to send on a message, with the settings you have you would need to send a message with msg.complete …

"join" doesn't work if only one of the nodes changes How can I make the join node to reuse the object the second time if it didn't change?

sorry for highjacking that thread, but I think it fits... In the following flow, the everything on button only works once, after the "preset" state changed. I need the join node to work overtime since the input "preset" wont change everytime. [{"id":"f5bb4a2d.bf9378","type":"function","z":"bd96744…

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Help with multiple inputs to a function node!

General

dceejay 16 July 2018 11:41 2

see - Store a value in a function for a start

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Help with multiple inputs to a function node!

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