I know that you can create dashboards in a separate tab using node-red-dashboard. However is it possible to have actual visualizations in the admin editor itself? For example might it be possible for part of the DAG to include a chart of the output of a node of some kind, right there in the editor? The idea is this:
I guess another version of the question is whether or not appearance of custom nodes is limited to what is shown here: https://nodered.org/docs/creating-nodes/appearance
Are there no other javascript "hooks" we can use to target the admin editor with other visual things? Or do such things have to live in another tab.
There are very few graphical elements for the editor, but see node-red-contrib-data-view (node) - Node-RED to include a chart in the editor.
It's still in development, but does provide a basic chart.
This is brilliant! So it's proof of concept that you can go "off the reservation" with the design of in-editor nodes. Not that I necessarily want to pollute the editor with all sorts of gumpf, but intermediate visualization of data is really quite a cool use case. And if this is possible, other things must be possible too. This is precisely what I required.
That is just awesome. I'm so excited about Node-red. I had looked at it a few years ago but let it lapse and picked up again because I need a system for financial markets data flows. The only concern I still have is Node-Red's throughput capacity for "firehose" data (say, 300 data points per second) but I assume there are back-pressure capabilities that will allow me to downsample if necessary. I'm going to stress test it on low end hardware (Rpi4) to give me some idea of the minimum throughput capabilities. I'll also be working with arrays and matrices using Apache Arrow (for which there is a javascript binding) so I'll have to see how that works.
It's a bit of a different use case than IOT but I see no reason why this fantastic project shouldn't be applicable. The node editor workflow is really exaclty what I'm looking for and what I appreciate is the careful design aesthetic and great docs. Very well run project, clearly.
Yes, but as node-RED is only single threaded, it may be an advantage to downsample the data in a script (not in node-RED), and then use the downsampled data in node-RED to process and display.
Otherwise the downsampling process will consume the single threaded runtime.
