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

Maros

ok i’ve checked and it’s not working fully.
problem is with /usr/bin/sh /home/pi/killpir.sh

there is no /usr/bin/sh only rsh

edit.
ok i’ve changed path to /bin/sh and now i get error :
grep: pir.py: No such file or directory
pkill: no matching criteria specified
Try `pkill --help’ for more information.

even if pir.py is running (i can see it in ps -ef |grep pir)

edit ok i was able to fix it i’ve edited killpir.sh to
sudo kill $(ps aux | grep python | grep pir.py | awk ‘{ print $2 }’)

now it will kill process pir.py

but problem is that even if this script (pir.py) is not running the mirror still turns on when there is movement and turns off after 30s no movement … strange

cruunnerr

When the pir.py isn’t running, then it isn’t this script which turns on your monitor.
Do you have the MM-PIR module active?

Please try to edit your rc.local and delete the autostart of the pir.py to see, if the monitor still turns on/off when there is movement.

if not, then the pkill command isn’t working, which would confuse me, because i just tried it by myself on my mirror.
via ssh i just entered the sudo pkill $(ps aux | grep python pir.py | awk '{ print $2 }')" command and my pir wasn’t working.

and to your first problem, which u solved by yourself…

u could also try to edit the killpir.py to this:

#!/bin/bash
sudo pkill $(ps aux | grep python pir.py | awk '{ print $2 }')

then u should be able to just let your cronjob look like:
0 21 * * * root /home/pi/killpir.sh

Maros

Yes i’ve active mmm-pir module.
I’ll try your solution and let you know
Thank you ;)

Maros

i’ve removed line from rc.local and mirror is still working as should (turn on when there is movement and turn off after 30s as set up in MMM-PIR module)

MadScientist

Was the MMM-PIR sensor module active while you tried the script of 2.2? You will have to disable the module. Then you create and load the scripts and create the cronjob. If you don’t disable the MMM-PIR module then it will keep waking up the screen even if you disabled the pir.py script.

Please excuse me if that’s what you did and I just got it wrong.

cruunnerr

Hey sorry, i thought u disabled the MMM-PIR for sure.

U cannot use both (Module and the script) at the same time.

Thats because i said u should disable the autostart in the rc.local to see if the MMM-PIR is active.

So please disable the module and just use the script. Then the pkill command will work as u want :)

Maros

everything is working after disabling module :)

just one remark there is needed to add also to crontab to turn off monitor at f.e. 21:02 because if there will be movement in last seconds before pir.py will be killed monitor will stay on :)

teitlebot

@Module-Developers im trying to do something a bit different maybe you can help.
I’d like to use PIR but I also want that on one particular day of the week PIR shouldn’t work and it should stay on no matter what.
Is that possible?

cruunnerr

Read the last few posts ;)

For example u want to use the pir from Sunday 22pm over the whole week until next Sunday 6am.
So on every Sunday from 6am to 22pm the monitor should stay on.

So you just need two cronjobs. On Sunday, 6am u need to kill the pir.py and on Sunday, 22pm you need to start it again :)

Try it like this:

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

#!/bin/bash
sudo pkill $(ps aux | grep python pir.py | awk '{ print $2 }')
vcgencmd display_power 1

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

0 22 * * 7 /usr/bin/sh /home/pi/killpir.sh
0 6 * * 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 22    * * 7   root    /usr/bin/sh /home/pi/killpir.sh
0 6     * * 7   root    /usr/bin/python /home/pi/pir.py
#

Mykle1

@cruunnerr

You’re the king of cronjobs!

komodoteler

@cruunnerr

I tried your script but unfortunately it doesn’t seems to work yet. Like @blebbens , my MM is on the floor and activated a little bit too easy.

Any other suggestion?

Regards,

cruunnerr

Well, for my solution it is totally necessary to NOT use the PIR-Module. You must use just my external script solution!
Tests i made working fine… :)

Anyhow… You could try to use clear nail polish.

I used it to cover certain regions and it works :)
Just paint several layers of the polish over the area u want to cover.

Or play with the sensitivity
Bild Text

komodoteler

@cruunnerr

I actually use option 2.2 - external script and already set both sensitivity and time delay to minimal (all the way to left).

would you mind to send me your pir.py?

Regards,

cruunnerr

Sure, my pir.py is the same as shown on point 2.2 but with other GPIO used

#!/usr/bin/env python

import sys
import time
import RPi.GPIO as io
import subprocess
import pigpio

io.setmode(io.BCM)
SHUTOFF_DELAY = 119 # seconds
PIR_PIN = 25       # 22 on the board
LED_PIN = 16

def main():
    io.setup(PIR_PIN, io.IN)
    io.setup(LED_PIN, io.OUT)
    turned_off = False
    last_motion_time = time.time()

    while True:
        if io.input(PIR_PIN):
            last_motion_time = time.time()
            io.output(LED_PIN, io.LOW)
            print ".",
            sys.stdout.flush()
            if turned_off:
                turned_off = False
                turn_on()
        else:
            if not turned_off and time.time() > (last_motion_time + 
                                                 SHUTOFF_DELAY):
                turned_off = True
                turn_off()
            if not turned_off and time.time() > (last_motion_time + 1):
                io.output(LED_PIN, io.HIGH)
        time.sleep(.1)

def turn_on():
        subprocess.call("sh /home/pi/lights_on.sh", shell=True)

def turn_off():
        subprocess.call("sh /home/pi/lights_off.sh", shell=True)

if __name__ == '__main__':
    try:
        main()
    except KeyboardInterrupt:
        io.cleanup()

Because i use some LED Stripes which turn on when the pir detects movement my “monitor_on.sh” is called “lights_on.sh”

lights_on.sh:

vcgencmd display_power 1

pigs p 17 1
pigs p 22 1
pigs p 24 1

sleep 0.06s

pigs p 17 2
pigs p 22 2
pigs p 24 2

sleep 0.06s

pigs p 17 3
pigs p 22 3
pigs p 24 3

sleep 0.06s

pigs p 17 4
pigs p 22 4
pigs p 24 4

sleep 0.06s

pigs p 17 5
pigs p 22 5
pigs p 24 5

sleep 0.06s

pigs p 17 6
pigs p 22 6
pigs p 24 5

sleep 0.06s

pigs p 17 7
pigs p 22 7
pigs p 24 6

sleep 0.06s

pigs p 17 8
pigs p 22 8
pigs p 24 7

sleep 0.06s

pigs p 17 9
pigs p 22 9
pigs p 24 8

sleep 0.06s

pigs p 17 10
pigs p 22 10
pigs p 24 9

sleep 0.06s

pigs p 17 11
pigs p 22 11
pigs p 24 10

sleep 0.06s

pigs p 17 12
pigs p 22 12
pigs p 24 11

lights_off.sh:

pigs p 17 12
pigs p 22 12
pigs p 24 11

sleep 0.06s

pigs p 17 11
pigs p 22 11
pigs p 24 10

sleep 0.06s

pigs p 17 10
pigs p 22 10
pigs p 24 9

sleep 0.06s

pigs p 17 9
pigs p 22 9
pigs p 24 8

sleep 0.06s

pigs p 17 8
pigs p 22 8
pigs p 24 7

sleep 0.06s

pigs p 17 7
pigs p 22 7
pigs p 24 6

sleep 0.06s

pigs p 17 6
pigs p 22 6
pigs p 24 5

sleep 0.06s

pigs p 17 5
pigs p 22 5
pigs p 24 5

sleep 0.06s

pigs p 17 4
pigs p 22 4
pigs p 24 4

sleep 0.06s

pigs p 17 4
pigs p 22 4
pigs p 24 4

sleep 0.06s

pigs p 17 3
pigs p 22 3
pigs p 24 3

sleep 0.06s

pigs p 17 2
pigs p 22 2
pigs p 24 2

vcgencmd display_power 0

sleep 0.06s

pigs p 17 1
pigs p 22 1
pigs p 24 1

sleep 0.06s

pigs p 17 0
pigs p 22 0
pigs p 24 0

But what exactly doesn’t work with my script? Maybe i can help :)

komodoteler

Thanks @cruunnerr.

In my case, no LED involved hence should be simpler :)

I run PIR.PY externally (via PM2) to call monitor on/off shell script and everything seems to work fine i.e.: turn screen blank and back on does work. No error reported. Its just the adding your script does not seems to make any difference, the turn on still instant.

Here is my PIR.py file

#!/usr/bin/env python

import sys
import time
import RPi.GPIO as io
import subprocess
 
io.setmode(io.BCM)
SHUTOFF_DELAY = 15  # seconds delay to turn off
PIR_PIN = 17        # Pin 11 on the board
TURNON_DELAY = 10   # seconds delay to turn on
 
def main():
    io.setup(PIR_PIN, io.IN)
    turned_off = False
    last_motion_time = time.time()
 
    while True:
        if io.input(PIR_PIN):
            last_motion_time = time.time()
            sys.stdout.flush()
            if turned_off and time.time() > TURNON_DELAY:
                turned_off = False
                turn_on()
        else:
            if not turned_off and time.time() > (last_motion_time + SHUTOFF_DELAY):
                turned_off = True
                turn_off()
        time.sleep(.1)
 
def turn_on():
    subprocess.call("sh monitor_on.sh", shell=True)
 
def turn_off():
    subprocess.call("sh monitor_off.sh", shell=True)
 
if __name__ == '__main__':
    try:
        main()
    except KeyboardInterrupt:
        io.cleanup()

Here is the monitor_off.sh

#! /bin/bash
export DISPLAY=:0
xset dpms force off

And Monitor_on.sh

export DISPLAY=:0
xset dpms force on

cruunnerr

Hey mate,

you are using this script.
As i wrote in my post, it was just brainstorming. I never tested this script. :(

But i can imagine that this will not work… For a Turn_on delay u probably need a loop-function.

But when i read your posts i can’t find, that u need this :D
So just try the script from the original 1# post :)

blebbens

Hello,

I‘m using the PIR python-script-method.
It is working fine… but, my mirror is installed in a floor, where people are crossing the mirror several times a day without looking at it.

It would be a helpful solution, if the script switches on the monitor if a person is standing in front of the mirror for 6 seconds.

Is there a possibility for modifying the script ?

cruunnerr

This will not work with a simple motion detector. Because “standing” is not “motion”. ;)

Then u would need a light barrier or something like that.

Or u need to shake your body for 6 seconds in front of the mirror XD

MadScientist

I wouldn’t know how to program it but you could try playing around with a photo resistor like this or this. But I think that will only work if you have constant light conditions. Maybe an IR light barrier with a reflector on the other side would work better.

No idea if what you want is possible but that would be an awesome project.

cruunnerr

Or use an ultrasonic sensor. You could let it measure the distance and if its under a specific value for a specific time it could turn on the monitor