Check actual state

General
1

Hi all!

Im working in my home lights project and i want to achive the following.

Im using sonoff with mqtt and homeassitant. All works fine!.
With node-red im checking the actual state of my sonoff if it is ON or OFF. All works fine.

The thing is i want to get the value or string of the ON state and how much is it ON. For example, the light is ON for about 1 hour. Then make something with that.

Im using the state node of home assistant and the information describes this.

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maybe i can use last_change or so but how can i get the data property?
If i put a debug the payload returns ON or OFF.

Thanks a lot in advance.

Regards!

2

Did you set the debug node to output the complete msg object ?

3

yes it is like this.
image

4

Read up on "working with messages"

5

check out this thread, it may give you some ideas Dashboard pie chart to show Raspberry pi GPIO history

6

Thanks a lot folks!!

I will give it a read.

7

Thanks a lot to all who answered.

I'm working on this feature and i find it a little bit complicated, maybe i'm complicating it too.

The thing is that i want to get the last time that the state was changed to ON. When that happens i have to compare that time and date with the actual time and date so i can get how many hours the light is ON because i could forget to turn it off o anything...

So, the debug tells me this.

image

How can i transform that to normal time and date?. I've read about the Change Node but i don't know.

Any ideas?

Thanks!

8

if this is what it says, the time since the last change in milliseconds:

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wouldn’t it be easier to convert this to something like minutes than to go down the way of date conversions?

Johannes

9

Ok, how can i access to that element? Maybe with a Change node?

10

well you can click this:

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next to the value to copy the path to this key of your msg object.
You could than use a change node like this:
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where you paste your copied path in the first field of the move rule and use a jsonata expression to convert to minutes and round the result.
You would than have with one change node a nice msg.payload with the minutes since the last change.

Johannes

1 Like
11

Thanks a lot! That worked perfectly.

Regards!

12

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