{HowTo} turn on/off your monitor (Time based, PIR/Button, App)

Magno99900

Hey, so I’ve been trying to get this working over the past few days using method 2.2 (pir script) I’ve verified that monitor_on/off.sh works as they should as does pir.py when run from terminal. The problem seems to be that I’m unable to get the script to auto start on boot. Any suggestions would be greatly appreciated.

komodoteler

@magno99900

Make sure you run chmod - chmod +x pir.py

Then add it to startup:

run - sudo nano /etc/rc.local
Add this (above the “exit 0”): python /home/pi/pir.py &
Save

Reboot to test

Magno99900

@komodoteler I’ll try again once I get off work, but i know I did chmod on pir.py and I currently have it in rc.local but I don’t currently have the “&” after it’s entry. When I looked at the first post it says to put it there but doesn’t display it in the code section.

Updated: Added the “&” still didn’t work, so I replaced the pir.py script that I was previously using and all seems to be great now. thanks again for the help.

Kecko

hey guys,

i got another problem.
the script is working well but the python won’t start with booting my PI.

i don’t know how often i repeated all the steps. I am using the method 2.2 Using PIR-Script.

i also put this line in my rc.local:

python /home/pi/pir.py &

anyone got an idea what i’m doing wrong?

EDIT:

Sorry I have just read the post of @Magno99900. So you just created a complete new .py script? i will try this later! Thanks so far :grinning_face_with_smiling_eyes:

Maros

I’ve just connected PIR sensor to my MM as written in step 2.1 Using PIR-Module

everything is connected MM is started but the screen is not turning off.

Can someone help me how can i check if PIR sensor is working and if it’s why the screen is still on ?

i’ve changed settings to

{
module: ‘MMM-PIR-Sensor’,
config: {
powerSavingDelay: 60 // (seconds) how long the monitor will be turned on
}
},

Maros

I found out that PIR sensor is ok.

i’ve created python script from this page ( https://tutorials-raspberrypi.com/connect-and-control-raspberry-pi-motion-detector-pir/ )and found out that i’ve switched Ground and 5V. I’ve corrected them and now when i execute : sudo python pir.py i get
There was a movement!

before there was nothing, so i guess PIR sensor is OK

but it’s still not working to turn off the screen.

Maros

OK everything is working after creating scripts from step 2.2 :)

Maros

is there possibility to turn off PIR at specified time ? f.e. from 9pm untill 7am it will be off so if there will be movement display will not turn on.

cruunnerr

@Maros

Glad u got it working. :)

So u use the script from point 2.2 ?

Then u could kill the pir.py at 9pm and start at 7am via cronjob. With that u were able to define each day for itself :)

The command to kill the pir.py script is

sudo pkill $(ps aux | grep python pir.py | awk '{ print $2 }')

So the easiest way is to just edit your crontab. Try it like this:

nano killpir.sh
Write this into file and save with CTRL+X and Yes

sudo pkill $(ps aux | grep python pir.py | awk '{ print $2 }')

chmod +x killpir.sh
sudo nano /etc/crontab
Write this into file and save with CTRL+X and Yes:

0 21 * * * /usr/bin/sh /home/pi/killpir.sh
0 7 * * * /usr/bin/python /home/pi/pir.py

So for example your crontab looks like this:

# /etc/crontab: system-wide crontab
# Unlike any other crontab you don't have to run the `crontab'
# command to install the new version when you edit this file
# and files in /etc/cron.d. These files also have username fields,
# that none of the other crontabs do.

SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

# m h dom mon dow user  command
17 *    * * *   root    cd / && run-parts --report /etc/cron.hourly
25 6    * * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )
47 6    * * 7   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )
52 6    1 * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )
0 21    * * *   root    /usr/bin/sh /home/pi/killpir.sh
0 7     * * *   root    /usr/bin/python /home/pi/pir.py
#

Didn’t try this solution at all, but hope/think this works :)

I would be glad about a feedback ;)

Maros

@cruunnerr ok thank you i’ll try it and let you know if it work.

just one question is it not needed to start pir.py in background ?

/usr/bin/python /home/pi/pir.py &