Hello, I am new to node red. I searched a lot, but I gess with the wrong searchterms. :-/ I would like to have a possibility to measure the "on" time of a device. It is switched with HTTP, I have it already in place in a flow and added e.g. a working GUI-switch which works well (displaying "on" a…

As far as I am aware, there is no special node that will do this for you. Most likely, the best approach would be to use a flow or global variable to track the on time. If you have multiple devices to track, I personally would make that variable an object that is keyed on a unique identifier for th…

This may be helpful, it measures the time between messages so if you send it the On and the Off then it will tell you how long it was On. I haven't tried it but it is one of @BartButenaers so I would expect it to work fine.

Oops, forgot the link. [image] node-red-contrib-interval-length A Node Red node to measure the interval length between successive messages

thank you colin, the "interval length" I have had already found, but it looked like in my case it is only a misuse ... thank you juntiedt I will take a look at the flow. :smiley:

I don't think that is a misuse of the node, it is exactly the sort of thing it is designed for.

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Simple possibility to measure time

General

juntiedt 24 March 2020 14:56 4

have a look
measure run time

Topic		Replies	Views
Counting time of turned on device General	4	718	12 November 2020
Cumulative running time General	14	3311	16 October 2022
Calculate the time of operation between ON and OFF given Boolean General	6	968	14 June 2021
Node Red Runtimes Dashboard	4	307	4 April 2021
Measure the Pulse duration of input Signal General	13	2464	13 March 2019

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Simple possibility to measure time

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