Only show screen when value above 0

[mciaio]

I have several screens working and all based on a value. Let's take solar power as an example. I want it to update and show the solar watts from panels only above 0 watts. When it is 0 watts, I want it to not show in the rotation. I mostly have it working, but instead of going away at 0, it reads the last value forever which is normally 1 watt. I noticed this is possible from the 'days til christmas" screen but can't duplicate it. I am pulling the values from MQTT, is that the problem?

I am using a function node with this code:

`var percent = msg.payload

msg.payload = percent;

if (percent === 0) {
msg.show = false
}
else if (percent > 0) {
return msg;
}`

[hamster65]

Your function only returns something when percent is > 0. It does not do anything when percent is 0, which is why PixelIt shows the last value > 0.

I would add some debug statements using node.warn, to figure out the code flow and the contents of msg.payload and percent.
Described here: https://nodered.org/docs/user-guide/writing-functions

[mciaio]

Thanks, I appreciate the input. Do you have any suggestion on how to make it work the way I would like it to? I want the screen out of the rotation when the value is 0.

…

On Wed, Nov 16, 2022 at 3:06 AM hamster65 ***@***.***> wrote: Your function only returns something when percent is > 0. It does not do anything when percent is 0, which is why PixelIt shows the last value > 0. — Reply to this email directly, view it on GitHub <#231 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AGAWQ7ZIITHEB5D6G66B7ILWISIWZANCNFSM6AAAAAASBP25KM> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[hamster65]

I assume your value is in msg.payload at the beginning?
I would try it like this:

var percent = msg.payload;

if (percent > 0) {
msg.show = true;
node.status({fill:"green",shape:"dot",text:"percent > 0, show"});
} else {
msg.show = false;
node.status({fill:"red",shape:"dot",text:"percent <= 0, hide"});
}
return msg;

[mciaio]

Awesome! Thanks!

[davosje]

Hi! i'm trying to get my solar information from HA to my clock. It works sometimes but only get undefined as information.

This is what I have:

Solar total HA is just a number represtenting watts.

with function node:

var watt = msg.payload

if (watt > 0) {
    msg.show = true;
    node.status({ fill: "green", shape: "dot", text: "watt > 0, show" });
} else {
    msg.show = false;
    node.status({ fill: "red", shape: "dot", text: "watt <= 0, hide" });
}
return msg;

I'm doing it wrong but have no idea, any suggestions?

[mciaio]

I don't know if it matters, but I have screen init prior to text. Swap that, then put a debug module after text and see what it's spitting out.

Your function code looks like it should work to me.

[davosje]

Thanks! Swapped it and used the debug node. Its spitting out a value. What should be the 'Text' in the last text node? Clock shows icon and as value undefined.

EDIT: got it, should be {{payload}}

[mciaio]

{{msg.payload}}

[aletdf]

Hi! I was reading this thread and I am interested to see the results in your screen. Can you share a picture or short video pleas?
Thanks!