Assistance with logic for flow, please. :)

General
1

Hey everyone,
I was hoping to get some direction on how to create this logical flow in NR. It's a system with 2 binary inputs and a camera for still image capture. I have the image capture stuff working already and the input monitoring is already set up and in-use in a much more simple setup than what I'd ultimately like to achieve.
These are the two sequences I'm hoping to create in NR.

Sequence 1:
Input_A goes low -> start frame capture, every 3 seconds until Input_A goes high AND (Input_B is high for 3 seconds OR 20 seconds passes without Input_B going high).
Send images in notification.

Sequence 2:
Input_B goes high -> start frame capture, every 1 seconds until Input_A goes low, then every 3 seconds until Input_A goes high, then 2 more frames.
Send images in notification unless Input_A doesn't go low within 60 seconds -> discard images. (false trigger)

Any examples would be greatly appreciated!

All the best,
Dax.

2

It might encourage involvement if you show what you already have that works, and explain what you have tried that may not have worked, so as to better understand your question.

3

Maybe re-word that.

My take:
When Input_A goes low:
capture a frame every 3 seconds until Input_A goes high AND - then it all falls over.

Maybe a Truth table? If possible.

It is just you haven't shown all the other options.
What happens if they aren't met?

Just I feel that without knowing that: it is difficult to work out what you actually want/need.

I'll try it this way:

Once started - taking pictures ever 3 seconds:
Continue until: either Input_A is high AND either Input_B is high for 3 seconds OR 20 seconds passes by.
No need to mention Input_B condition. That only confused silly people like me.

Maybe better worded like this:
(Once started)
continue until:
for 20 seconds OR
Input_A goes hight AND Input_B is hight for >3 seconds

To me that is clearer.

4

Hey Gunner and Andrew,
Thanks for your replies. The problem is that I don't even know how to start this. The very first 'gate' is actually two choices: Input_A goes low, triggering sequence 1 or Input_B goes high, triggering sequence 2. Once one of those sequences has started, it must follow to the end (which could be the time-out)

These inputs are switches (NC and NO) on GPIO pins.

Does that help at all?

Cheers,
Dax.

5

How about this?

It is the best I can work out from your description.

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6

Have a look at the Ultimate Boolean nodes - i think they might help here for what you are trying to achieve.

Craig

7

Does this achieve your Sequence 1?

Untitled 2
Untitled 21208×451 38.8 KB 

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8

Hey everyone, sorry for the super slow reply, we have a newborn at home, so it's been hard to find a moment to go through these proposed solutions.

I want to sit down and go through them properly so I can a) solve the problem and b) learn from these examples.

@Trying_to_learn and @jbudd, thank you both so much for your time to help me with this.

@craigcurtin, ahh! Those nodes looks awesome. I just read the descriptions; they sound like something I will use a lot. Thank you!!

Speak soon! :smiley:
-Dax.

9

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