Hello function 3 malfunction How it works

Dashboard
1

Hello, thank you very much for your help. I really like the joy of learning.

in function block
The part about the code doesn't seem to work well, but I also referenced information on the Internet.

var msg0={payload:(msg.payload[0]<<16+msg.payload[1])}
return msg0;

We will send you the node below.

buffer 1 value and
Buffer 2 values ​​are different. however
The calculated value continues to be 524288... I would like to know if there is a problem with the code or if it needs to be returned again.

thank you.
To everyone who replies and watches...
flows.json (1.9 KB)

2

You cannot compare values in Buffer1 with values in Buffer2 because they are in two seperate messages.
A function node can only work on a single message.
You need to combine them into one message by setting msg.topic "buffer1" or "buffer2" and use a Join node in manual mode.

3

image
image1920×1080 298 KB

I did it again separately and the result was the same.
524288
Did I do something wrong?

We will send you a sample node below.
flows (1).json (2.8 KB)

4

Yes - you need to make the buffers appear a single message.

See this article in the cookbook for an example of how to join messages into one object.

5

thank you

6

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