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A New Chapter for MagicMirror: The Community Takes the Lead
Read the statement by Michael Teeuw here.

MMM-Temperature/Humidity Module (DHT11, DHT22 and AM2302 sensors.)

Scheduled Pinned Locked Moved Utilities
34 Posts 11 Posters 31.3k Views 10 Watching
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  • C Offline
    cowboysdude Module Developer
    last edited by Sep 28, 2016, 10:57 PM

    What is the brand and perhaps part number you’re using for this? Wiring?

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    • B Offline
      Bangee Module Developer
      last edited by Sep 29, 2016, 8:50 AM

      @psk Do you need to run magicmirror as root?

      I try to find a solution to do the same as pi

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      • J Offline
        Jopyth Moderator
        last edited by Sep 29, 2016, 9:46 AM

        @Bangee As far as I know, the normal pi user has sudo rights already. I use a module to shutdown the mirror which needs sudo rights, but works fine with exec from a normal node_helper.

        Helpful sticky: How to troubleshoot

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        • B Offline
          Bangee Module Developer
          last edited by Sep 29, 2016, 11:11 AM

          @Jopyth yes, he has, but he’s going to start the MagicMirror with sudo npm start

          for security reasons I try to run everything without sudo commands.

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          • P Offline
            psk
            last edited by Sep 29, 2016, 11:18 AM

            @cowboysdude DHT11 - This is the sensor that I am using.

            It has three pins -
            +ve - Connected to 5v
            -ve - Ground
            Data - Connected to pin 2

            0_1475147721302_Screenshot_20160929-130338.png

            @Bangee Now, I am running as sudo npm start. Without sudo, it will throw an exception that says it cannot open dev/mem

            0_1475147793966_permission.png

            This is the module screenshot.0_1475147819902_temp.png

            P.S.K

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            • B Offline
              Bangee Module Developer
              last edited by Sep 29, 2016, 11:23 AM

              0_1475148058296_DHT22.JPG

              I’m using node-dht-sensor

              As user pi I don’t have an error but after starting MagicMirror thers a crash.

              @psk you should cool down your room :-)

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              • C Offline
                cowboysdude Module Developer
                last edited by Sep 29, 2016, 11:49 AM

                I really do like this! Great job!

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                • P Offline
                  psk
                  last edited by paviro Oct 3, 2016, 12:25 PM Sep 29, 2016, 11:55 AM

                  @Bangee According to bcm2835 v1.50-

                  "Running as root
                  Prior to the release of Raspbian Jessie in Feb 2016, access to any peripheral device via /dev/mem on the RPi required the process to run as root. Raspbian Jessie permits non-root users to access the GPIO peripheral (only) via /dev/gpiomem, and this library supports that limited mode of operation.

                  If the library runs with effective UID of 0 (ie root), then bcm2835_init() will attempt to open /dev/mem, and, if successful, it will permit use of all peripherals and library functions.

                  If the library runs with any other effective UID (ie not root), then bcm2835_init() will attempt to open /dev/gpiomem, and, if successful, will only permit GPIO operations. In particular, bcm2835_spi_begin() and bcm2835_i2c_begin() will return false and all other non-gpio operations may fail silently or crash."

                  So i guess we have run with sudo until some other library comes up :D

                  PS: I should!! Its too hot in here… :D :D

                  @cowboysdude Thanks! Cheers :D

                  P.S.K

                  1 Reply Last reply Reply Quote 2
                  • J Offline
                    jsyzthz
                    last edited by jsyzthz Sep 29, 2016, 1:47 PM Sep 29, 2016, 1:47 PM

                    @psk i’m following your steps.but got some errors
                    0_1475156462089_upload-b782b89f-2067-4c7d-92ed-d69124b72d1c
                    can you help me to take a look? thanks!

                    P 1 Reply Last reply Sep 29, 2016, 2:35 PM Reply Quote 0
                    • P Offline
                      psk
                      last edited by paviro Oct 3, 2016, 12:25 PM Sep 29, 2016, 2:15 PM

                      @jsyzthz I ran into the same while setting up!

                      try this. Go to MMM-Temperature-Humidity,

                      npm rebuild --runtime=electron --target=1.4.0 --disturl=https://atom.io/download/atom-shell --build-from-source

                      My Electron version is 1.4.0. If yours is different, replace accordingly. :D

                      This is a known issue which is caused by the serialport module using native code that is built for a different version of Node. You can read a bit more about addons here, if you’re interested; they’re just modules written in C/C++ that can interface with Node so the module can interface with the hardware more easily.

                      Credits : stackoverflow.com


                      Note from admin: Please use Markdown on code snippets for easier reading!

                      P.S.K

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