So not the sharpest programmer in the world... in fact not programmer. However I do like to make things, and have programmed some stuff before. However, I am struggling with getting some logic right. I want to: Make a system that, based on indoor/outdoor humidity, starts a ventilator. I have so f…

Please read How to share code or flow json and then EDIT your post and fix it so it can be imported.

Hi @Zenofund, thanks for your reply. I did that now. Better?

Side question : what is the main purpose of this ventilator you are trying to automate?

I think you've missed the backticks on a BLANK line before and after your block of code.

Lol. If I cannot even figure out how to post here... aaargh. The pupose of the vent is simple: i have a basement with a natural high humodity in sunmer time of 70’ish percent relative hum (Denmark). The code will measure basement and outdoor relative humidity and temperature and calulate gram/m3 w…

OK. The timer component then. It controls the running time and turns off the vent. The humidity conditions still require vent to be running. Same goes to manual turn off. So in this situation the automatic "turn on" should be avoided somehow if I'm correct. How long this state last or what triggers…

Just go back and edit your original post - put three backticks on a line by themselves both before and after the code block and it will go into a single line window Craig

OK just to summarise what you are trying to achieve A manual turn on mode - regardless of humidity levels etc - this will run indefinitely until turned off ?? or on a timed basis ? At the end of this manual cycle - does the system revert back to automatic control i.e. the high and low humidity se…

Wuhuuu backticks = tjeck The idea is: Regardless of what starts the vent, there should be a maximum runtime (30min for example) and a pause (2hr for example). These should be adjustable. Hum condition is: absolute hum indoor < absolute outdoor * tolerance (%) If the hum condition are ok AND the …

Yep check out the DSM node [image] node-red-contrib-dsm A dynamic state machine node based on the finite state machine model. It will take you a while to wrap your head around it - but i took a hybrid Arduino/Picaxe system that had horrible code with lots of exc…

The right logic for this task

General

FarfarGoHai 22 August 2019 19:05 18

I think I've got it Yeah

[{"id":"bf81618d.3c40e8","type":"change","z":"854d80b8.4c26c8","name":"reset for manual","rules":[{"t":"set","p":"payload","pt":"msg","to":"{ \"payload\": \"off\" }","tot":"json"}],"action":"","property":"","from":"","to":"","reg":false,"x":1140,"y":1040,"wires":[["8669658.7fd3b98"]]}]

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The right logic for this task

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