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

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    • psk
      psk last edited by paviro

      @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 😃

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

      @cowboysdude Thanks! Cheers 😃

      P.S.K

      1 Reply Last reply Reply Quote 2
      • J
        jsyzthz last edited by jsyzthz

        @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!

        psk 1 Reply Last reply Reply Quote 0
        • psk
          psk last edited by paviro

          @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. 😃

          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

          1 Reply Last reply Reply Quote 0
          • psk
            psk @jsyzthz last edited by paviro

            @jsyzthz
            I’m not sure whether to rebuild in MMM-Temperature-humidity directory or the Magic Mirror directory.
            Try executing in the MagicMirror directory first.

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

            Also you can find the electron version by : npm list

            Just in case, i had this in my commands history 😃
            npm rebuild --runtime=electron --target=1.3.4 --disturl=https://atom.io/download/atom-shell --abi=49 -d

            P.S.K

            J 1 Reply Last reply Reply Quote 0
            • J
              jsyzthz @psk last edited by

              @psk i use the first command. it woks now.thx!

              psk 1 Reply Last reply Reply Quote 1
              • psk
                psk @jsyzthz last edited by

                @jsyzthz Glad I could help 😃 😃

                P.S.K

                1 Reply Last reply Reply Quote 0
                • H3L1o150
                  H3L1o150 last edited by

                  Hi, i am really new on this, someone can help me, with the code on config.js file?

                       {
                                  module: 'MMM-Temperature-Humidity',
                                  position: 'bottom_bar',
                                  config: {
                                    var dht = new rpiDhtSensor.DHT11(21);
                  	    }
                        },
                  

                  thanks

                  yawns 1 Reply Last reply Reply Quote 0
                  • yawns
                    yawns Moderator @H3L1o150 last edited by

                    @H3L1o150
                    No, you need to edit the file node_helper.js in the modules folder
                    Currently you cannot define the pin and the sensor type in the config section. But I think this should be improved in a future release

                    1 Reply Last reply Reply Quote 1
                    • H3L1o150
                      H3L1o150 last edited by paviro

                      @yawns so i left the config.js file like that?

                        {
                               module: 'MMM-Temperature-Humidity',
                                position: 'top_right',
                                config: {
                                     ...
                            }
                        }
                      

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

                      yawns 1 Reply Last reply Reply Quote 0
                      • yawns
                        yawns Moderator @H3L1o150 last edited by yawns

                        I never played around with this module. But I would use this:

                        { module: 'MMM-Temperature-Humidity', position: 'top_right' }

                        And then you edit node_helper.js to set for DHT11 or DHT22 and the correct pin in ( )

                        1 Reply Last reply Reply Quote 1
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