Motion Detector

in_a_days

The system stat module I’m referring to is this one.

https://github.com/BenRoe/MMM-SystemStats

It would have to be specifically installed by the user. But looking at the screenshot from @trividar, there are a couple different modules throwing up errors. These couple lines show the modules that appear to be crashing the system:

You can see mmm-systemtemperature and MMM-DHT22 producing error events. I would start by commenting out these modules. Just add a

/*

before and a

*/

after the section of your config.js file that loads these modules. If that eliminates the crashing you can be confident it is these modules causing the problem, and you can either try to fix them or look for alternatives.

EDIT: The common theme between my error and the error posted here is the ENOMEM code, and the fact that all these modules are measuring system temperature. MMM-SystemStats, mmm-systemtemperature, and MMM-DHT22 are all reading temperatures. I would be willing to bet there’s a bug or memory leak somewhere in the code that is pulling or logging temperature info. I’m not convinced any of these particular errors are related to the Motion Detector module.

in_a_days

Well… so much for that theory lol. I just got the ENOMEM error from Motion Detector.

danielis

I had the same issue.
For me was the solution to increase the capture interval time from 100ms to 1000ms.
With the default value of 100ms the overall systemload is to high and one of the two electron processes will use after some time around 85% of the memory. At that value the system slows down extremely and the memory swap process will take all cpu ressources while trying to free up physical memory.
And then anything can happen … (white screen, unresponsive, ENOMEM exceptions, …)

Go to motiondetector.js and search for this code part:

DiffCamEngine.init(
{
video: video,
motionCanvas: canvas,

Add the following line to change the default capture interval time of 100ms to 1000ms:

DiffCamEngine.init(
{
video: video,
captureIntervalTime: 1000,
motionCanvas: canvas,

Observe the two electron processes and they will not reach memory values higher than 30%.

jdahli1

@danielis Fingers crossed, this appears to be working! The mirror has turned on and off a dozen times now with no processor or RAM issues.

trividar

@danielis woooow its working now since one hour!! thank you!!!

in_a_days

Same here. Great work and many thanks @danielis!

slametps

Is this module work along with MMM-Facial-Recognition using the same camera?

danielis

Not working here. Only either one or the other.
But paviro said he will include a motion detection to the facial recognition module at some time.
I will try to do it also. Will report if I have success

oscarkindberg

Hi!

I’m trying to get this to work, have a USB cam attached to the RPI3 and installed the .js.
But when I add the code:

{
module: ’motiondetector’,
config:
}
}

Am I missing something? Because it only give me errors… :(

(new to this)

in_a_days

@oscarkindberg Try this instead:

            {
                    module: 'motiondetector',
                    config: {
                            timeout: 300000 // time in milliseconds for to switch off the display after last movement is detected.
                    }
            },

This is set for a 5 minute delay. Modify the timeout value if you want a longer or shorter delay before your screen turns off.