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MMM-PIR-Sensor black screen



  • Hello everyone,

    i just found out about this module - didn’t even know this exists - and i hat to try it!
    I’m planning on saving some energy by powering off the Monitor.

    The install worked fine and the PIR Sensor is working (i have a litte .py script that’s prints a message in the shell if a movement is dedected) BUT the screen stays black!

    The Monitor is powerd on - i even see the desktop seconds bevor MM boots up, but the screens stays black and nothing is displayed.

    I noticed this before when i was trying to turn my monitor on and off again with tvservice --off / tvservice --preferred.
    If i use vcgencmd display_power 1 / vcgencmd display_power 0 my Monitor perfectly switches on and off again.

    But, i checked the “node_helper.js” on github and the helper file is using the “vcgencmd script”

    What is going here? Any ideas how i can solve this?



  • @Stef with the black screen and a keyboard, press ctrl-shift-i (letter I),
    to open the developers console, select the console tab, and scroll up to find errors, red text



  • @sdetweil thanks for the headsup - but this does not work… i see the mous coursor though, but that’s it.
    I even can’t “cancel” the fullscreen mode of the magic mirror by pressing F11 (usually this brings me back to the desktop) 😕



  • I did a little research and stumbled over severall issues on the github page - this one catched my eye, but didn’t brought me any luck…

    So, what did i do excatly?

    1. Install:
    cd ~/MagicMirror/modules/
    git clone https://github.com/paviro/MMM-PIR-Sensor.git
    npm install
    sudo usermod -a -G gpio pi
    sudo chmod u+s /opt/vc/bin/tvservice && sudo chmod u+s /bin/chvt
    sudo reboot
    
    1. New wiringPI version:
    sudo apt-get purge wiringpi
    hash -r
    sudo apt-get install git-core
    cd
    git clone git://git.drogon.net/wiringPi
    cd ~/wiringPi
    git pull origin
    ./build
    sudo reboot
    
    1. reinstall EPOLL:
    cd ~/MagicMirror/modules/
    sudo npm install --save-dev electron-rebuild ./node_modules/.bin/electron-rebuild
    
    1. recompile Electron:
    npm list | grep electron
    cd ~/MagicMirror/modules/MMM-PIR-Sensor
    npm rebuild --runtime=electron --target=1.4.5 --disturl=https://atom.io/download/atom-shell --abi=50
    sudo reboot
    

    Expectation: It Works now…
    Reality: It does not…

    my Config is:

    {
              module: 'MMM-PIR-Sensor',
              config: {
                           sensorPin: 23,
                           powerSaving: true,
                           powerSavingDelay: 120 // 2 Minutes
                           }
    },
    

    I just excluded this part of my config - and my mirror displays everything again…

    Andy ideas left? 🙂



  • Hey all,
    turns out, that the MMM-PIR-Sensor Module is buggy - well, at least for me.
    Can’t get it to work, but i found an alternative: MagicMirror-Display-Controller

    Works like a Charme!

    Case closed 🙂

    Have a nice weekend!


  • Module Developer

    @Stef Hi, yesterday i added two Modules to the Showcase Area. On that monitors GPIO Pins and one which controls the Monitor.
    My usecase is exactly like yours. I use an PIR sensor to detect user presence and want the screen to be turned off after a configurable timeout.
    If you want to try them:
    MMM-Screen-Powersave-Notification
    and
    MMM-GPIO-Notifications