Motion Detector

danielis

Yes, that was what I tried to say in my first post yesterday.
I had the same problem.
Old monitors do not turn off by themselve if there is no signal. Newer monitor do turn off, and all is fine.

My solution was tu use a relais to turn on/off the current of the monitor. Therefore I used a pin of the GPIOs to control the relais.

For controlling this GPIO pin I used the wiringpi library

I had to add some lines in the node_helper.js - please look at the lines with: exec("gpio -g …

pi@magicmirror:~/MagicMirror/modules/motiondetector $ more node_helper.js

'use strict';

/* Magic Mirror
 * Module: MMM-PIR-Sensor
 *
 * By Paul-Vincent Roll http://paulvincentroll.com
 * MIT Licensed.
 */

const NodeHelper = require('node_helper');
const exec = require('child_process').exec;
var moment = require('moment');

module.exports = NodeHelper.create(
{
  start: function ()
  {
        //this.started = false;
        exec("gpio -g write 4 1", null);
        console.log('motiondetector started ...');
        console.log('monitor relais on');
  },
  activateMonitor: function ()
  {
        exec("gpio -g write 4 1", null);
        console.log(moment().format() + ' monitor relais on');
        //this.started = false;
  },
  deactivateMonitor: function ()
  {
        exec("gpio -g write 4 0", null);
        console.log(moment().format() + ' monitor relais off');
        //this.started = false;
  },
  socketNotificationReceived: function (notification)
  {
      //const self = this;
      if (notification === 'MOTION_DETECTED')
      {
          //const self = this;
          //this.started = true;
          this.activateMonitor();
      }
      if (notification === 'DEACTIVATE_MONITOR')
      {
          //const self = this;
          //this.started = true;
          this.deactivateMonitor();
      }
  }
} );

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?