"Art" of the sequence, a Node-RED retrospective

💬 Lounge
34

So you might want to check out my subflow I did which synchronizes an RGBW device to another one.. see my "Lawn Dart" above for how it works in a sequence.. (the vctlInitNodeRed + switch was just for startup you can replace with something else) dunno if it would help or not.

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1 Like
35

I must not be pushing the limits with Node Red because I don't have a single subflow. I went thru all of mine and only found one place where I could do it and it would only change 2 nodes to 1 so not worth the effort. Other than @erktrek who has already shared, what kind of things are you guys doing with subflows?

36

I rarely use subflows. Sometimes, but not often. Not because I don't like subflows, they are great, it is just more of a stylistic decision.

37

I use them whenever I have a function node that I reuse many times. That way I only have to change code in one place. Otherwise certain things like a predefined email alert notification or "sensor open for 5 mins" kind of thing. I've also done a "group" of sensors with a rate limit delay node. The key is de-duplication of stuff - almost like a function library.

1 Like
38

So another post.. just did this thanks to @fblackburn's excellent new update. This sets 2 dashboard chart nodes (one for each hub) with battery device levels... (very bad of me not to be more descriptive in naming nodes)

The Rocket!

nr-art2
nr-art21530×396 52.9 KB

1 Like
39

I needed a motion lighting flow that respected manually controlling the lights. Along with usual time of day, illuminance filters. I wasn't being very successful, so Googling around I found an example from a HA user. It uses a node called a finite state machine. It takes a little bit to understand if you are not a programmer, but it's not that conceptually difficult. Basically the flow chooses a path based on triggers, current state, and future state. There's a lot more at the original reddit post.

Screen Shot 2020-04-24 at 7.36.14 PM
Screen Shot 2020-04-24 at 7.36.14 PM2550×1102 447 KB

Flow JSON:

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2 Likes
40

So that is cool - thx for the state machine node! Have to check it out.

Also for your function node.. try this one instead (function nodes are not efficient due to the way they sandbox) or recreate using core nodes.

1 Like
41

One more... so this is my simple motion disable.. for my use-case. I use a virtual switch in HE that enables or disables the timeout then control via external sequences like timers etc that enable/disable. Thanks to the NR for HE updates I can now test for physical switch and set disable as needed.

nr-art3
nr-art32726×199 74.4 KB

I call this the "stick"... :grinning: - which at the present time of the screenshot the motion detect is disabled due to a time constraint.

42
  • Armada

This one is receiving all of the data from an EcoWitt GW1000 for the sensors on the outdoors PWS, add-on temp/humidity sensors around the house, PM 2.5 sensors, soil moisture sensors, etc. Each has a debug to enable disable to validate a message is being received and then passed to RBE to prevent duplicate noise finally passed to MQTT which is then used elsewhere. Not complex at all. Just a whole lot of sensors!

image
image602×800 92.2 KB

2 Likes
43

Nice! That reminds me I have a bunch of moisture sensors lying around just waiting for some love.... mmmmm more projects to add to the list. They are the cheapo kind that I think will degrade quickly though - maybe one season. Have to look.

44

I pretty heavily re-worked the flow to be more robust in responding to different events (esp. turning lights on/off during motion active), set the timer to start after the sensor goes to inactive, and be slightly more readable.

Screen Shot 2020-04-28 at 3.10.05 PM
Screen Shot 2020-04-28 at 3.10.05 PM2694×1580 727 KB

JSON:

Summary 
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45

Wow you have a lot going on there! I am intrigued by the FSM.

You could name that "chaos theory" in terms of the "art".
:grinning:

3 Likes
46

It is kind of funny.. a quick glance at the attached picture it seems like a lot to take in, but opening up the full sized version and following along, it all makes so much sense..

I can't even imagine what a fustercluck that would be to do in Rule Machine™

NR rocks!

3 Likes
47

Whats kind of interesting is with dynamic device selection (which we were discussing that desired feature in the other thread) in the HE Nodes you could possibly make this a subflow and use it for other lights..

1 Like
48

Ha ha. It's more or less a standard Motion Lighting app. Both this and the equivalent ML app run this flow in about 300 ms.

The one thing it does that ML doesn't (I think) is to put in a re-triggering delay if the light is manually turned off.

A fair amount of the extra stuff is debug/testing nodes that can be gotten rid of.

Once you get the idea of triggers and states and valid combinations the FSM makes more sense.

I had to put some delays in the flow as switching the lights with motion would trip the light switch events (bottom left of the flow) and would sometimes get the state machine to run valid but unintended transitions.

You might be able to get around that with physical/digital filters. But those aren't foolproof either. For example: all button (e.g. Pico) presses would be flagged as digital if you are monitoring the light events. You have to monitor the physical button to get the event to be physical.

1 Like
49

Follow up here for more show and tell:

This implements a loop, but because of the left-to-right nature of node-red, I think it's a "twisted circle":

image
image983×189 28.3 KB

It's purpose is to shut off the lights after 8:30, and after the motion zone is inactive.

This one looks like a Saturn rocket to me:

image

It's a porch-lights-on-at-dusk-off-at-sunrise flow.

1 Like
50

I saw this but missing the lower wings. Add another Inject and Comment Node at the bottom then add more text to each Comment Node to make them longer and you nailed it!
image

2 Likes
51

That's pretty complex for a straight dusk/dawn on/off. There are nodes that can do dusk/dawn triggering in 1 node.

Here's an example using bigtimer for on=dusk, off=23:45:

image
image1625×342 51.8 KB

The link out is because I use those times other places, too.

52

Just curious how people are creating sequences.

Are you organizing things in different flows. One flow is button devices, another flow is motion sensors, another flow is general rules to turn on and off stuff.

Can you also call other flow sequences?

Lastly, by no means does looking at flows and sequences make it easy on the eyes. I find it much easier to look at rule machine or an event engine.

53

I have my flows arranged this way for now:

  • Exterior and Entrance - Entry alerts, exterior lighting etc.
  • Main Floor - main floor hub sequences.
  • Basement - basement lighting etc (on main hub).
  • Upstairs - my upstairs hub sequences - lighting/fan control etc.
  • Control - used for global operations affecting all my hubs/flows. Cloud/presence stuff etc.
  • Dashboard Config - use for dashboard initialization stuff.
  • Testing - testing stuff, just a place to mess around.
  • On Ice / Trash - this is a disabled flow for parking things.

Also use a lot of subflows if possible - even very simple ones like a notification subflow containing just an email node... the idea being I can change things in one place and it changes everywhere. stuff like that.

edit: The way you call other sequences in flows is by using the "link in" "link out" nodes... also for me reading sequences is mostly easier than RM - depends on the sequence of course and how descriptive I've been with my node naming. Really complex sequences can be confusing but likewise with RM but in general I find it easier to trace out whats happening.