Hi, is it possible to save dashboard data (for example chart data) for restart node-red service? At the moment i lost all Data. At the Moment i use node-red-dashboard Thank you Alex

[image] corin.corvus: do i need both for each chart ? Yes, a change node to save the chart data, and a inject node to restore the chart data. [image] corin.corvus: do i need click on all before i restart or only one time forever? You don't need to click the inject node at all. It will…

hmm what does the info box for the chart node say ?

"The node output contains an array of the chart state that can be persisted if needed. This can be passed into the chart node to re-display the persisted data." But i dont know how i can do this. Full Text: Plots the input values on a chart. This can either be a time based line chart, a bar char…

First of all, you need to create a file based context store, see https://nodered.org/docs/user-guide/context which is a means to save your chart data to your SD/hard disk so the data will survive a reboot. Once you've done that, add a change node on the output of your chart node, and set it to save…

There is an example in the flows site that purports to do exactly what you want https://flows.nodered.org/flow/92920b4fd450bf92a3035e061947daa0

Ok i will test it today. Thank you

[image] Colin: There is an example in the flows site that purports to do exactly what you want Isn't that an old example - pre context data?

[image] Paul-Reed: Isn't that an old example - pre context data? Yes, but it still works. Probably the author should update it, I don't suppose he is very busy at the moment. :slight_smile:

@corin.corvus give me 5 minutes and I'll do you an example flow... Set up your file based context store first as per the link above, then see this flow - [{"id":"8bc18a0c.193898","type":"ui_chart","z":"c53060.842a0fa","name":"","group":"61d2dced.3db8f4","order":1,"width":0,"height":0,"label":"char…

Hi, now i think i did it. i have a context folder in .node-red with a file. now i impored your flow. may i connect all charts with one change node or i have to add a change node for each chart? ok i tested it with one chart. after restart the data was dropped. i set this in settings.js: conte…

Dashboard backup

Dashboard

Paul-Reed 22 April 2020 15:16 11

You need to have a different store for each chart, otherwise all of your charts will display the same data.

Example -
flow.temperature
flow.windspeed
flow.humidity

Did you reboot after setting up the context store to make it available?
Can you try again.

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Dashboard backup

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