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

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    • U Offline
      ulster
      last edited by

      @cruunnerr

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

      S 1 Reply Last reply Reply Quote 0
      • S Offline
        sdetweil @ulster
        last edited by

        @ulster kill 2.2 what?

        Sam

        How to add modules

        learning how to use browser developers window for css changes

        U 1 Reply Last reply Reply Quote 0
        • U Offline
          ulster @sdetweil
          last edited by

          @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()

          S 1 Reply Last reply Reply Quote 0
          • S Offline
            sdetweil @ulster
            last edited by

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

            Sam

            How to add modules

            learning how to use browser developers window for css changes

            1 Reply Last reply Reply Quote 1
            • A Offline
              andi.aw.weiss
              last edited by 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

              M 1 Reply Last reply Reply Quote 0
              • M Offline
                MadScientist @andi.aw.weiss
                last edited by

                @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.

                A 2 Replies Last reply Reply Quote 0
                • A Offline
                  andi.aw.weiss @MadScientist
                  last edited by

                  @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

                  1 Reply Last reply Reply Quote 0
                  • A Offline
                    andi.aw.weiss @MadScientist
                    last edited by 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

                    cruunnerrC M 2 Replies Last reply Reply Quote 0
                    • cruunnerrC Offline
                      cruunnerr @andi.aw.weiss
                      last edited by

                      @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.

                      A 1 Reply Last reply Reply Quote 0
                      • M Offline
                        MadScientist @andi.aw.weiss
                        last edited by

                        @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.

                        1 Reply Last reply Reply Quote 0
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