[logo_279] I'd like to announce a new package for node-red that I just published. Did you ever want to have flexible state-machines in node-red and be able to track their state and data visually? [example-visualization] Then you came to the right place. Check out my blog post or go directly to …

On my admittedly old Pi2 - the cat example does this [smxstate:sm-cat ] Rendering of state machine failed: Render process timed out. smcat renderer process exited with error code null.

@dceejay Thanks for bringing that to my attention. I incorporated a timeout in the render process because I feared the system could get unresponsive if something goes wrong. That and also, because viz.js seems to have some memory-leaks, is why I run the rendering in a separate process in the first p…

Hi, ok I had to "tune" it up to 40000 (40s) for it to render reliably... looks very nice - but that is not sustainable in real life :frowning: . Presumably it will take even longer if the state machine gets more complex... so yes some other method of detecting completion (or not) would really be ne…

Also - if I create another node - by dragging from the palette - the debug windows shows [image] Ie - both with some words at the start (SM-Cat Example) that appears nowhere in the node config - as far as I can tell... where is that coming from. (Ah just worked it out - it's the tab name... mayb…

Not sure I quite understand the two outputs of the node either. While I understand it's all about he state machine - from the outside world the important piece is the data that is sent out - so that should really be the primary output (IMHO) . The secondary output should be for interesting meta-data…

@dceejay Thanks again for your excellent feedback. It is very important to me because it's my first time creating something for node-red and it probably isn't very polished yet (also because there was no one other than me testing it). [image] dceejay: ok I had to "tune" it up to 40000 (40s) for…

[image] dceejay: if i deploy it it starts creating loads of warnings in the console log You're right - the default node contains an example that demonstrates the node.warn() functionality. I probably should comment that out at least.

It would probably be fairly easy using uibuilder :wink:

Well maybe one message in the log is ok - but only if it is a real warning... maybe just a log rather than warn message if you like. If I see lots of things in the log I think something is wrong ! Still not quite getting the point of the outputs - OK - I get the state one - but why output the int…

Marcus @sonntam good work In process control & industrial automation FSM are called "State Transition Diagrams" or more formally "Sequential Function Charts" in IEC61131-3 And are implemented in PLCs/Automation controllers. As means of programming with real time feedback. The diagrams are a lot …

[Announcement] node-red-contrib-xstate-machine - Flexible state-machines for node-red

Share Your Nodes

Steve-Mcl 7 April 2020 15:40 17

Excellent idea @bakman2 . Would certainly trim the fat off.

I've Used Mermaid on an in house wiki. Its so simple to generate from text. Perhaps this node could output compatible Mermaid code for external rendering? Would be easy to consume in UI builder or a dashboard node.

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[Announcement] node-red-contrib-xstate-machine - Flexible state-machines for node-red

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