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

[Asphyth]

Hi, ! thanks for this GREEATTTTT TUTORIAL !

Working great with python,

About that, when my screen is turning down he shows “No signal” before turning black, any solution to hide this ?

[pugsly]

@Asphyth That is your monitor, its not coming from the Pi.

[sdetweil]

@Asphyth that is the energy star power down requirement. it warns you of no signal, and then is required to turn the display off electrically to save power

[pascal006]

hi!!
for this point the … always running i dont have LED to make a test . So my question is do i did a mistake someware ?

You can check if your button works by simply typing python pir.py. Every time u move through the PIR or press the button it will show you several …
End the test with “ctrl+c”

[Peter Leemon]

Hi all have followed step 2.1 got my tv to turn off and back on ok but doesn’t stay on for long at all (only a few seconds)?

[FREIGHTTRAIN]

This post is deleted!

[Fozi]

@FREIGHTTRAIN Can you elaborate more precisely, what is not working? What have you done? What is the expected behaviour? How does it behave? How to reproduce? That might help in helping you.

[drk-geek]

hi @cruunnerr
I just installed it, everything looks good but not working at all. I tried via 2.1 Using PIR-Module and 2.2 Using PIR-Script both not working, any suggestion how to check where the issue is?

[deebee999]

@cruunnerr
I have had success with your help and my PIR sensor but only after running pir.py from .bashrc

The script is working however I read the following warning when accessing my Magic Mirror with SSH:

RuntimeWarning. This channel is already in use, continuing anyway. io.setup(LED_PIN, io.OUT)

My end result is not affected. The PIR works fine.

Thank you

[maptecnet]

Just a little feedback that was a huge help for me.
@cruunnerr don’t know if you want to add this information on your first message.

I have a samsung d6000 series tv that wouldn’t work anyway with modules for PIR sensor. A BIG aplause for all developers but i coudn’t get the tv out of “No Signal” message. The MagicMirror would turn image off but tv only in “No Signal”.

I’m not a programmer and just went on test and try.

I figured out that the https://github.com/bugsounet/MMM-NewPIR from @Bugsounet (BIG thanks to you also!) managed the problem!!

With this module set to mode: 4 - use HDMI CEC the TV shuts down when the MagicMirror tells her to shut down!
It’s straight through ON and OFF as expected!

I’me very thankful to you all managing to help us out!
Thanks!

[ulster]

@cruunnerr

its possible to kill 2.2 Using PIR-Script in rasp pi?
Can you tell me how I cans do it please?
thanks

[sdetweil]

@ulster kill 2.2 what?

[ulster]

@sdetweil

This one. Mentioned in the first page.
how to remove it?

#!/usr/bin/env python

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

io.setmode(io.BCM)
SHUTOFF_DELAY = 120 # in seconds, how long the monitor will be on until next button press or PIR detection
PIR_PIN = 22 # 15 on the board (this needn’t to be a PIR. Can be a button also)
LED_PIN = 16 # optional, don’t use as Relay-PIN. It just shows detection time of the PIR without delay time

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/monitor_on.sh”, shell=True)

def turn_off():
subprocess.call(“sh /home/pi/monitor_off.sh”, shell=True)

if name == ‘main’:
try:
main()
except KeyboardInterrupt:
io.cleanup()

[sdetweil]

@ulster sorry, i dont know anything about the module and dont read ( or re-read) every page of posts

[andi.aw.weiss]

Hello everyone, I’m getting desperate. I’ve now read the entire tutorial but I can’t find my mistake.

I am using my MM with a PIR sensor and would like to switch the backlight of the display with a relay. so i use this script pir.py:

#!/usr/bin/env python

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

io.setmode(io.BCM)
SHUTOFF_DELAY = 120 # in seconds, how long the monitor will be on until next button press or PIR detection
PIR_PIN = 22       # 15 on the board (this needn't to be a PIR. Can be a button also)
LED_PIN = 16      # optional

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/monitor_on.sh", shell=True)

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

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

Unfortunately, when I run this script in the terminal, I only get the feedback from the PIR sensor (…) but the relay is not switched. But if I run the monitor_on.sh or monitor_off.sh script it works:

monitor_on.sh

gpio -g mode 27 out
sleep 0.2
gpio -g write 27 1

monitor_off.sh

gpio -g mode 27 out
sleep 0.2
gpio -g write 27 0

But the PIR.py doesn’t work. Where could the mistake lie?

Many greetings Andreas

[MadScientist]

@andi-aw-weiss I think you are using the wrong script. With just a quick look it seems you’re running the script from point 2.2 (Using PIR script) of the first post. What you want is point 5.2 (Use relay with a PIR). That script used in 5.2 is different than that of 2.2, which does not have code to control the relay.

Have a look at it again.

[andi.aw.weiss]

@MadScientist Hey, unfortunately the problem hasn’t changed. I have now like you said the script from 5.2. The problem remains. PIR detects motion. Relay does not switch. :loudly_crying_face: I don’t know

[andi.aw.weiss]

@MadScientist ok it seems to be working now. However, the relay switches the first time after the 120 s have expired and a movement is detected. not previously. The change quote: “io.output(RELAY_PIN, False)” and for monitor off “io.output(RELAY_PIN, True)” only causes the relay to work in reverse. I now use this script:

#!/usr/bin/env python

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

io.setmode(io.BCM)
SHUTOFF_DELAY = 120 # in seconds, how long the monitor will be on until next button press or PIR detection
PIR_PIN = 22       # 15 on the board (this needn't to be a PIR. Can be a button also)
LED_PIN = 17    # 11 on the board (optional): It just shows detection time of PIR without delay time
RELAY_PIN = 27  # 13 on the board

def main():
    io.setup(PIR_PIN, io.IN)
    io.setup(LED_PIN, io.OUT)
    io.setup(RELAY_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():
        io.output(RELAY_PIN, True)

def turn_off():
        io.output(RELAY_PIN, False)

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

where could the error lie? or is that how it should be? Thank you MadScientist

[cruunnerr]

@andi-aw-weiss

Hey hey,

So what exactly doesn’t work? My English isn’t the best

In my case I am turning on a LED Stripe with the pir.

When I cold start the raspi, the LED stripe turns on for a few seconds (could be the turnoff delay time).
After a while it turns off.
From this moment on it should work as you expect. When movement is detected, the led (or relay) turns on for the delay time and extend the delay time for every new movement within the original delay time.

[MadScientist]

@andi-aw-weiss said in {HowTo} turn on/off your monitor (Time based, PIR/Button, App):

The change quote: “io.output(RELAY_PIN, False)” and for monitor off “io.output(RELAY_PIN, True)” only causes the relay to work in reverse. I now use this script:

Are you saying the screen turns off when the PIR detects a motion? In that case you have to change the the terminals on the relay. You have three terminals to connect the wires to. GND, normal open and normal close.

Another note: I have a bunch of relays here that are supposed to be compatibles with Raspberry Pi’s but somehow they don’t properly work. They switch exactly once and then are stuck. Not sure if you’re having the same issues.