Hi Paul, If I may ask, can you give me some hint or a link about the best way to add dynamically the 2 stored kWh flow values ? Regards, W. Envoyé: samedi 22 octobre 2022 à 10:29

Hi Paul, Sorry to ask, but it is only 2 days I am in Node-Red, In what kind of node do I include the code you mentioned ? W.

This kind of code goes into a function node.

@Walt_Dod You would learn a lot about how to use node-RED by spending some time reading the node-RED documentation, including tutorials . If you wanted to add together the 2 stored values, you would need to add the code that I posted above in a function node to retrieve the values, and add them toge…

Hi Paul, Maybe you can help with the following : when redeploying the flows, the watt2kWh values are lost on the dashboard and back to zero. Is there a way to store them so that the dashboard shall not be altered ? Rgds, W.

Thank you Paul, Would you mind sending the Jason code for both inject & save context nodes ? It appears that there are many different kind of configurations for the cache used and I cannot figure out how to manage it. Regards, W. Envoyé: mardi 25 octobre 2022 à 00:29

Why not try and work it out yourself. Have a look at the output from your chart node, you need to save it, and then when you restart the flow or reboot, inject the 'saved' file back into the chart node, to restore the chart. The screenshot in my last link of the flow should give you a clue It's …

Hi Paul, As the watt2kwh node was set with your help in context mode to avoid data influence from one node to the next, it seems that I only had to uncomment contextStorage: { default: { module:"localfilesystem" }, }, in settings.js to have the stored kwh data saved in the dashboard when red…

Hi Paul, The uncommenting of my last mail (see below) did work for a while but not any more... I had a look on [image] Fun With Persistence? General Hi @Nodi.Rubrum that is strange. When I use the same contextStorage setting as you have, then the editor knows I have mul…

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How to sum 2 saved context values

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Paul-Reed 24 October 2022 22:19 10

Have a look at post - Persistent chart node

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How to sum 2 saved context values

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