Motion Detector

paphko

Just as a side note, I have the same issue that my RasPi screen does not switch on again after a random time. But I am running v1 of the mirror (so not this motion detector module) and I use motion for motion detection. My guess is that this is an issue with the RasPi firmware because it was working fine several months ago (and I was frequently updating RasPi firmware)…

cowboysdude

I just run a straight cron job with a file called pir.py that runs two other files…

monitor_on.sh
monitor_off.sh

It’s not incorporated into the mirror it runs the entire pi and I’ve had great luck with it! :)

cpramhofer

hi @cowboysdude ,

could you please give me (and maybe others) the detailed instruction how these files look in detail and where those are located?

thanks a lot in advance,
Christoph

cpramhofer

here is what i have done, actually it works - i will watch it a few days.

switch to /bin/

cd /
cd bin

open nano and create a shell script

sudo nano monitor_on.sh

write the “On” Command in it and save with Ctrl+x

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

open nano and create another shell script

sudo nano monitor_off.sh

write the “Off” Command in it and save with Ctrl+x

/opt/vc/bin/tvservice -o

make both shell scripts executable

sudo chmod +x monitor_off.sh
sudo chmod +x monitor_on.sh

open the crontab and add the following at the end

switches the monitor off and on every 15 minutes. this is for experimenting, i will look how it works and will set the

time up as.

15 * * * * sudo /bin/monitor_off.sh
15 * * * * sudo /bin/monitor_on.sh
@reboot sudo modprobe bcm2835-vl2

cowboysdude

Well hey Thanks for making that easy… was JUST working on that LOL I’m putting it on github with instructions and the files…

cowboysdude

https://github.com/cowboysdude/Pir-Sensor

cowboysdude

Update:

https://github.com/cowboysdude/Pir-Sensor

Monitor was only partially coming back on this should fix that.

chengstark

my monitor won’t turn back on
when I run “npm start dev”, it shows “compare result=Infinity,Infinity;0,0” , seems like it can’t capture any movement
the camera module works outside MagicMirror
when I tried “sudo modprobe bcm2835-v4l2”, it says “modprobe: invalid option – ‘4’”
how can I fix this

cpramhofer

Hi @cowboysdude

thank you for your files and the explanation. what i don´t understand is how this all works together with the “Motion Detector” - i would prefere to use a camera instead of a PIR Sensor but as far as i see i have to install the pir.py file which is calling the on&off files and referring to the PIN with the connected PIR sensor.

is there a way to use the on&off files with the “Motion Detector” Module?

greets
Christoph

cpramhofer

Hi guys

as it looks that it isn´t an MM problem but an Pi Problem…another try:

sudo nano /etc/kbd/config

change the values to zero

BLANK_TIME=0
POWERDOWN_TIME=0

good luck

cowboysdude

@cpramhofer There is a module for camera control… cannot remember the name of it but look around here I KNOW there’s one here.

cpramhofer

hi @cowboysdude,

i´m sorry - i thought we are all speaking about the camera based motion detection by @alexyak
https://github.com/alexyak/motiondetector

have a nice sunday!

cowboysdude

@cpramhofer No that’s ok… I think this thread is getting mixed between PIR sensor and camera… opps

bhepler

Greetings! I’m slowly working my way through this thread and trying to figure out what’s going on here.

What works: configurable timeout for the motiondetector seems to work just fine. Turns the screen off. Interestingly, if I’m viewing the mirror via my desktop browser, refreshing the page will turn the monitor on.

What doesn’t work: turning the screen on. Even after entering sudo modprobe bcm2835-vl2

Additionally, I’m seeing this in the console with the developer tools enabled:
getUserMedia() no longer works on insecure origins. To use this feature, you should consider switching your application to a secure origin, such as HTTPS. See https://goo.gl/rStTGz for more details.
:8080/modules/motiondetector//webcamcapture.js:78 NavigatorUserMediaError

paphko

I just tried this module but cpu load made me stop using it. Please tell me, how busy is your Raspberry with and without the motiondetector module? Mine is as follows on a Raspberry Pi 2:

With motiondetector enabled, there is always an electron process with ~100% cpu
With motiondetector disabled, I observed one or two electron processes with up to 15% cpu

I used a dedicated motion daemon on my old version of the mirror to switch on the screen on motion and I think I will set it up again. IIRC, it used ~40% cpu on a (single-core) Raspberry Pi 1 B+. What is your opinion?

bhepler

@paphko I just looked at my Pi 3 and I’m showing 40% usage with the motion detection module running (and failing). I suspect it’s the constant pic-compare-pic-compare loop that runs. It would be trivial to insert a wait in that loop to lower the CPU usage. Even a delay of 750 ms would probably help quite a bit.

alexyak

@bhepler you’re right. putting a delay should help with the CPU usage.

bhepler

Thanks, @alexyak. Any idea about how to get around the issue with the new security surrounding webcams?

DirkS

Hi, i had some issues with the PIR module where the screen doesn’t switch on anymore. Now with a original PI Camera i tried this module. Same issue, the screen doesn’t switch on but in this case no motion seems to be detected. (the PIR did detect)

with /opt/vc/bin/tvservice --preferred && sudo chvt 6 && sudo chvt 7 i can switch on the screen manually.
I followed every tip here in the thread. So i have no idea what is going on :(

mm-0 (out): monitor has been deactivated
mm-0 (out): monitor :state 0x12000a [HDMI CEA (16) RGB lim 16:9], 1920x1080 @ 60.00Hz, progressive
mm-0 (out):

That is the only thing i can see in the log.

bhepler

Check the console log. I suspect you’ll see a security error preventing the browser from accessing the monitor. Either launch your mirror in dev mode (modify your mm.sh script to read DISPLAY=:0 npm start dev and then restart via pm2 restart 0) or browse to your mirror’s address via a web browser and enter developere mode.