Counter works just once

General
1

Hi all,

I created a UI with a button. On click a counter shall increment from 0 to 50 and back down to 0 (let's don't mind if i just count down to 1 or whatever...)

When i press the Button the first time everything works as expected. Once the flow had run, a click at the Button doesn't lead to a count up and down anymore. instead it jumps from 0 to 50 and 0 without counting.
I'm sure, as a Node Red Beginner, I may have forgotten or overseen something fundamentally.

Any idea what i do wrong?
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Appreciate any help,
BR,
Rob

2

For the flow you posted, and from what I can determine, it is because the count nodes are not being reset.

(I know. It took me a while to work it out too as it doesn't show in the context part.)

If you add an inject node and a change node and set the change node to:
msg.reset to true and then connect that to the two count nodes, all will work.

Flow attached.

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Or!

To make it even simpler - as I am guessing you want to be able to use this over and over:
You can adjust the delay node as needed. It actually may not be needed. I put it in just for the sake of making sure the signals don't trip over each other.

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3

Thanks for your help!

The first flow you posted has the same issue like mine. But your second one seems to do the trick!
Thanks a lot!

so it seems like the count node needs to receive the msg.reset directly? I thought to pass it over the others...
Are all nodes processing a msg.reset?

4

No, as far as I know the change node builds the msg.reset message and it is sent to the count node.

The message ends there.

I don't understand what you mean in the bigger picture.

I thought to pass it over the others...

it?
over?

The change node is connected to the count node.
That (they) is (are) the node(s) which needed to be reset.

And don't worry if you get confused. I spend a lot of time in that condition.

5

Hi again.

I was thinking about the flow and as much as I get you are new to Node-Red, I would like to offer an alternative to how you did it.

I get that the while node is nice for what you were/are doing, it involves a non standard node.

Basically the while node is really doing much the same as the switch node.

Here is another layout of your flow but using the switch node.

I can get you may not want to do it this way, as you have your mind set to the way you showed it.
I really get it.

But only if for the sake of an alternative way, have a look.

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