Sum function of two sensor data

General
1

I can't sum the numbers which are collected from sensors.

Capture
Capture.PNG1157Ă—715 60.9 KB 

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2

Unfortunately your flow isn't currently importable.Please read the following post How to share code or flow json and then edit the above message.

Take a look at the cookbook that might have an example that helps... http://cookbook.nodered.org

1 Like
3

There are a few ways to do this. I believe the join node will work however my preferred method is to store the values in flow context & then when any one changes, pull them both back from flow context & add them together.

4

Unfortunately, my major is product design and I'm not familiar with the node red environment. In fact, the university has forced on to work on this project

5

have you tried anything?

Have you tried a join node to see what happens?

Have you read up on context?

Lastly, have you searched this forum? There are many examples.

Heres one i adapted slightly...

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edit...
This example requires node-red-dashboard
Steps to use it...

  1. Press CTRL+I (to open the import dialog)
  2. Paste the code in
  3. Deploy.
  4. Press CTRL+SHIFT+D to access the dashboard
1 Like
6

I've read this:

but it doesn't work.

Capture
Capture1128Ă—173 18.3 KB

How can I use it?

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7

Use what? The flow you posted is the one I posted 5 mins ago.

Use it like that ^

Or take the functioning parts and adapt them into your flow. I dont understand what you want?

8

I have two sensors. Each of them gives numbers between 0-1.25. Then I've changed them to numbers between 0-25. I have a chart for each sensor and now I need the chart which shows the sum of these two.

Capture
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9

So where you get the value for gauge1 and gauge2, connect them also into the "set val1" and "set val2" nodes I provided. Then connect the output of the add function to your gauge3?

All the pieces are there - give it a go.

1 Like
10

It Works!!! Thanks :heart_eyes::heart_eyes::heart_eyes:

11

Thanks Steve - it work's like charm! :slight_smile:

One question: I added six values, the debug now sends six times the same value.. is there a solution to that?

12

Hi @cwein87 welcome to the forum.

That post is over 3 years old. A lot has changed in that time.

Please start a new thread detailing what you have done & what you are seeing.
Ensure the title is descriptive to draw the correct attension (e.g. "I have a problem" is not a good title. "How can 6 values in separate messages be added together" is a good title)

closing this old thread.