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

cruunnerr · Sep 21, 2018, 8:04 PM

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 · Sep 20, 2018, 9:17 PM

@cruunnerr

You’re the king of cronjobs!

komodoteler · Sep 22, 2018, 8:54 AM

@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 · Sep 22, 2018, 10:37 AM

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

komodoteler · Sep 22, 2018, 10:51 AM

@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 · Feb 27, 2019, 4:41 PM

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 · Sep 23, 2018, 4:49 PM

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 · Sep 24, 2018, 3:34 AM

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 · Sep 29, 2018, 10:24 AM

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 · Oct 3, 2018, 8:41 AM

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