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A New Chapter for MagicMirror: The Community Takes the Lead
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LED Backlight for mirror - PIR to control them

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  • P Offline
    pjkoeleman
    last edited by pjkoeleman Aug 14, 2017, 8:33 PM Aug 14, 2017, 8:32 PM

    @Mirrorolentia said in LED Backlight for mirror - PIR to control them:

    Please do let me know if you too have started on something.

    I’am working on a Pi-hat (plug on to the GPIO connector) witch can control an RGB-LED strip.
    For the software I want to use a PIR and the clock for switching On/Off. With PWM (Puls Wide Modulation) regulating the brightness. Color changing will be random, but there will be a fixed color in a white color, around 3000 K (warm-white).

    It will take some time to build/write the software, because I’am not a software guru.

    1 Reply Last reply Reply Quote 0
    • M Offline
      Mirrorolentia
      last edited by Aug 20, 2017, 7:05 PM

      So finally have been able to integrate the led lights :) Got the code working just now. However, will need sometime to make a proper module out of it. Tried out with johnnyfive and node-pixel with some luck…but it was hyperion/boblight that did the magic for me.
      Of course, the trigger comes from Alexa/Echo rather than a PIR sensor.

      1 Reply Last reply Reply Quote 0
      • O Offline
        orayoflighto Project Sponsor
        last edited by Aug 21, 2017, 12:19 AM

        I did this.

        alt text

        I used the MMM-PIR-Sensor module and changed the following in node_helper.js:

        From:

                if (data.indexOf("0x120002") !== -1)
                  exec("/opt/vc/bin/tvservice --preferred && chvt 6 && chvt 7", null);
        

        To:

                if (data.indexOf("0x120002") !== -1){
                  exec("/opt/vc/bin/tvservice --preferred && chvt 6 && chvt 7", null);
                  exec("python /home/pi/py-spidev/RPi-LPD8806/LED.py");
               }
        

        and

        From:

              exec("/opt/vc/bin/tvservice -o", null);
        

        To:

              exec("/opt/vc/bin/tvservice -o", null);
              exec("python /home/pi/py-spidev/RPi-LPD8806/off.py");
               }
        

        Note that in the first from - to there is a “)” missing in the original code that you will need to fix. Also note that as soon as the module gets updated if you hack the code like I did above it will be wiped out when you update.

        C 1 Reply Last reply Aug 21, 2017, 12:25 AM Reply Quote 3
        • C Offline
          cowboysdude Module Developer @orayoflighto
          last edited by cowboysdude Aug 21, 2017, 12:26 AM Aug 21, 2017, 12:25 AM

          @orayoflighto NICE!!! What light strips did you use?

          O 1 Reply Last reply Aug 21, 2017, 12:31 AM Reply Quote 0
          • O Offline
            orayoflighto Project Sponsor @cowboysdude
            last edited by Aug 21, 2017, 12:31 AM

            @cowboysdude

            I used these only because they were incredibly cheap and I originally started out looking at MMM-PiLights which uses the same LPD8806 type:

            https://www.amazon.com/gp/product/B01COEJST8/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1

            I used this python code:
            https://github.com/longjos/RPi-LPD8806

            C 1 Reply Last reply Aug 21, 2017, 12:32 AM Reply Quote 2
            • C Offline
              cowboysdude Module Developer @orayoflighto
              last edited by cowboysdude Aug 21, 2017, 12:35 AM Aug 21, 2017, 12:32 AM

              @orayoflighto VERY nice, Thank you!!!

              You outta do a write up with instructions! MANY people would love this!

              1 Reply Last reply Reply Quote 0
              • S Offline
                Snille Module Developer
                last edited by Aug 21, 2017, 7:36 AM

                Just to add some depth to this… If you really want to go “crazy” with animations, I’m recommending Bibliopixel and PixelWeb. Then you can “animate” lot’s and trigger them with a curl “command”. Plus you get a nice Web-interface to test the animations in. :)

                If you cant find it, make it and share it!
                Modules: MMM-homeassistant-sensors, MMM-Modulebar, MMM-Profilepicture, MMM-Videoplayer

                1 Reply Last reply Reply Quote 1
                • K Offline
                  Kimzer
                  last edited by Aug 21, 2017, 7:53 AM

                  Oh lawd! This looks insanely good. Thanks alot for the guide. Out to go buy some strips today! :D

                  K 1 Reply Last reply Aug 21, 2017, 11:50 AM Reply Quote 0
                  • K Offline
                    Kimzer @Kimzer
                    last edited by Aug 21, 2017, 11:50 AM

                    @Kimzer said in LED Backlight for mirror - PIR to control them:

                    Oh lawd! This looks insanely good. Thanks alot for the guide. Out to go buy some strips today! :D

                    To quote myself…

                    Can i use any sorts of led strips? Im looking to buy something from a store and not order online if possible.
                    Im in norway so if anyone knows something i could buy please let me know!

                    1 Reply Last reply Reply Quote 0
                    • O Offline
                      orayoflighto Project Sponsor
                      last edited by Aug 21, 2017, 8:15 PM

                      Different strips have different ways they need to be programmed. Some have faster refresh rates than others.

                      Most people will suggest ADA102 for beginners. The strips I linked to are LPD8806. As I mentioned previously the only reason I bought those ones is that MMM-PiLights was programmed to use them.

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