Motion Detector

pepemujica

@danielis Hi! I’ve tried, but still can’t get it. So I was thinking, instead of putting of the monitor, is it possible to show a black image for example?
So when it detects movement, the MM appears, and when not, a black photo is shown.
Is it possible?

yawns

@pepemujica
There is a module called HideAll (or something similar) which simply hides all modules and leaves a black background. Maybe you want to try it

Kimzer

Could someone please write up a working instruction for the motion detector with the rasperry pi camera? Not the pir sensor, need to make use of the camera somehow. :)

mickyas

@alexyak Does this module switch off the pi, i’m only asking since i have Alexa running in the background which requires 3 terminals to be open all the time? If the pi goes into ‘standby’ or goes off i have to re-enter the information into the 3 terminals consecutively to get it up and running again. Thanks
Mick

bhepler

@Kimzer I wrote up a method using a version of Motion for the RasPi. It’s under the tutorials section of the forum. It’s a non-module solution, so there’s some weirdness involved. But I did get it to work with a Raspicam.

@mickyas - This module doesn’t switch off the pi, it just switches off the output to the monitor.

cowboysdude

@bhepler Yup that’s what I did too.

Hawking

I’m trying to use this model on my Raspberry Pi Zero W with the Raspberry Cam. I run
MM in serveronly mode, using the Midori-browser. This setup itself works fine and also the camera is able to make pictures

raspistill -o testpicture.jpg

However, if I try to add the ‘motiondetector’ module to the config I just get an empty (black, but not switched of) screen after reboot. This is even the case for a very small config.js :

var config = {
        port: 8080,
        ipWhitelist: ["127.0.0.1", "::ffff:127.0.0.1", "::1"],
        language: "en",
        timeFormat: 24,
        units: "metric",

        modules: [
                {
                        module: "clock",
                        position: "top_left"
                },
            {
                    module: 'motiondetector',
                    config: {
                            timeout: 5*60*1000
                    }
            },
        ]

};

/*************** DO NOT EDIT THE LINE BELOW ***************/
if (typeof module !== "undefined") {module.exports = config;}

Things I did:

cd ~/MagicMirror/modules
git clone https://github.com/alexyak/motiondetector

Added line bcm2835-v4l2 to /etc/modules and hdmi_blanking=1 to /boot/config.txt

If I omit the motiondetecotor entry in the config.js it loads fine and I can see the loaded modules. If I execute

/opt/vc/bin/tvservice -o

the screen goes off (completely black). I I afterwards run

/opt/vc/bin/tvservice --preferred && sudo chvt 6 && sudo chvt 7

the background light of the screen goes on, however the modules that were there previously don’t show up again ( I waited for several minutes).
If I run

/opt/vc/bin/tvservice --preferred && sudo chvt 6 && sudo chvt 2

the modules become visible again. Therefore I changed the line in

~/MagicMirror/modules/motiondetector/node_helper.js

accordingly. However then I got still an empty screen and in the log:

Jul 16 18:59:23 me startMagicMirror.sh[480]: ** Message: console message: [native code] @0: Starting module: motiondetector
Jul 16 18:59:23 me startMagicMirror.sh[480]: ** Message: console message: http://localhost:8080/modules/motiondetector//motiondetector.js @39: TypeError: Attempted to assign to readonly property.
Jul 16 18:59:24 me startMagicMirror.sh[480]: monitor :state 0x12000a [HDMI DMT (82) RGB full 16:9], 1920x1080 @ 60.00Hz, progressive
Jul 16 18:59:24 me startMagicMirror.sh[480]: ** Message: console message: http://localhost:8080/js/main.js @134: TypeError: null is not an object (evaluating 'moduleWrapper.getElementsByClassName')

To me as a beginner it looks like a permission problem. However even making the motiondetector folder and all files therein rw for everybody it didn’t work.

I hope that somebody who has knowledge about JS can comment on this issue. Many thanks in advance.

strawberry 3.141

@Hawking try to change line 39 to:

cameraPreview.style.visibility = "hidden";

Hawking

Thanks for the quick help. I also found the line in motiondetector.js a bit strange (why the semicolon within the parenthesis…) but as I don’t know JS or details about the code, I couldn’t judge.

I still have the same effect (blank screen) but the new error message is

Jul 17 23:16:55 me startMagicMirror.sh[445]: ** Message: console message: [native code] @0: Starting module: motiondetector
Jul 17 23:16:55 me startMagicMirror.sh[445]: ** Message: console message: http://localhost:8080/modules/motiondetector//diff-cam-engine.js @81: TypeError: undefined is not an object (evaluating '(navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia).call')

Maybe all these things give empty? As a workaround I surrounded the function by

function requestWebcam() {
         var self = this;
         method = (navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia);
                   if ( !! method ) {
                     ....
                  }
}

Now at least the other modules load successfully.
However, the modules don’t get deactivated after some minutes :-/ I assume that one of these navigator methods is needed for the motiondetector to work? If I look at https://developer.mozilla.org/en/docs/Web/API/Navigator/getUserMedia they seem anyway outdated? How would the user grand permission in a headless setup? Does somebody know if they are supported by the Midori browser?

strawberry 3.141

@Hawking As far as I know electron exposes the audio and video access, but in midori you probably need to allow the access manually