Motion Sensor Bug - how to solve

Timsche2210 · December 25, 2021, 4:42pm

Hi there,

I use node red at my home assistant.
This is my current flow:

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I have the problem, that the sensor not always detect motion.
Or sometimes the light turns on and 5 sec later it turns off.

The motion sensor is a philips hue motion sensor and the light is controlled by a shelly dimmer 2.

Can anybody find the bug in my flow?

Regards
Timo

nappyjim · December 25, 2021, 5:05pm

Kind of difficult to read with the language barrier, but what I see is if the trigger state goes false (no motion detected), it starts a 1 min trigger and once that expires, it turns the light off.

But you have no logic in there to say, “but if you see motion again, stop the timer”. So even if the motion sensors sees motion again, it will still turn the light off after 1 min.

Heres one of my simples motions flows. I like to use varitime-delay node.

So pretty much,

Motion on will turn light turns on and STOP message is sent to timer node
Motion off starts 5 minute timer
IF 5 minute timer expires, light is turned off.
BUT if motion is sensed again, it sends a STOP which stops the timer and resets it.

Cause you have to account for your motion sensor not sensing you for a short period of time, but that doesnt necessarily mean you arent still in the room. Maybe you just moved into a corner for awhile or stopped moving.

So pretty much in my flow, its needs to see no motion triggered for a continous 5 minutes before it will turn off the light. In your flow, it just needs to see no motion for 1 times and then it will turn the light off after 1 minutes, EVEN IF it sees motion after the timer starts.

Timsche2210 · December 25, 2021, 5:43pm

thank you for the quick response and helpful answer!
Can you please share your code, so I can import this to my flow to modify it?

edit:

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I created this flow, but something seems to be wrong…?

nappyjim · December 27, 2021, 4:04pm

Sorry for slow response. Here you go.

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Timsche2210 · December 27, 2021, 8:38pm

Thank you - I will try it, as soon as I have time for it