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    Problem with my pir sensor

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    • F Offline
      Fonfon
      last edited by

      Hi

      I have a pir installed but unfortunately the screen never goes into standby,

      The module MMMpirSsensor is nevertheless well installed I use the output gpio 22
      If it comes from the pir or elsewhere?
      thank you in advance

      rchaseR 1 Reply Last reply Reply Quote 0
      • rchaseR Offline
        rchase @Fonfon
        last edited by rchase

        @Fonfon I don’t have a PIR sensor for my Magic Mirror yet, but I was just reading yesterday about problems with the PIR and Raspberry Pi 3

        Apparently, the PIR gets interference from the Wireless chip on the Raspberry Pi 3 and it causes it to give bad readings, even the Adafruit site has a note about it:

        https://www.adafruit.com/product/189

        “PIR sensors and the Raspberry Pi 3 sometimes don’t get along - if you’re having false trigger reports, make sure the PIR Sensor is far away from the Pi 3”

        Here is another possible solution - this guy used some kind of interference blocker on the wire, check it out:

        https://helentronica.com/2016/01/11/magic-mirror-with-motion-detector/

        1 Reply Last reply Reply Quote 0
        • F Offline
          Fonfon
          last edited by

          HI

          thanks for your answering i put a ferrite bead near gpio connector but my output 15 gpio 22 is always high
          so my screen is always turn on .
          i don’t why …
          Perhaps my pir is broken because the first time I plugged in I reversed the power supply…

          M 1 Reply Last reply Reply Quote 0
          • B Offline
            bberg115
            last edited by

            @Fonfon Did you try to adjust the resistance of the PIR?

            1 Reply Last reply Reply Quote 0
            • M Offline
              maxtone66 @Fonfon
              last edited by

              @Fonfon I’m in the same case of you, my screen don’t turn off.
              I was wondering if my PIR wasn’t broken but I wanted to check it before.

              So before changing your PIR you can test it by a simple python script. I found this (in french) : http://mycoolpizza.blogspot.fr/2013/05/raspberry-pi-utiliser-un-capteur-de_29.html?m=1

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              • F Offline
                Fonfon
                last edited by

                Hi,

                I tested my pir with my multimetre I just disconnected the output and testing directly on the pine I saw that my output always remained high.
                I changed my pir now all works perfectly

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