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

    How to use the 'node_helper', 'serialport'

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    • S Do not disturb
      sdetweil @nhpunch
      last edited by

      @nhpunch there are two parts of a MagicMirror module

      1. node_helper, runs on server, can use require(…some other library…)
      2. module_name.js, runs in browser, manages data presented on screen, cannot use require(…)

      so, the two parts can talk to each other by sending socket messages, using the supplied function
      sendSocketNotification(some_id_string, some_data_packet)

      the receiver of the message gets called at the function socketNotificationReceived(some_id_string, some_data_packet)

      get my sample module that has both parts, and uses timer,

      https://github.com/sdetweil/SampleModule
      

      also see the developers doc here

      https://github.com/MichMich/MagicMirror/tree/master/modules
      

      my sample implements all the functions so you can see them…
      not all are needed… so u can comment out the ones u don’t need to use

      config for my sample, to add to config.js is

        {
          module: "SampleModule",
          position: "center",
          config: {
            message: "this is a test from config entry"
          }
        },
      

      Sam

      How to add modules

      learning how to use browser developers window for css changes

      N 1 Reply Last reply Reply Quote 0
      • N Offline
        nhpunch @sdetweil
        last edited by

        @sdetweil

        I was really grateful and ran the sample code.

        But I do not know what to send as a module to do what I want.

        Can you help me with my module and node_helper?

        S 1 Reply Last reply Reply Quote 0
        • S Do not disturb
          sdetweil @nhpunch
          last edited by

          @nhpunch sorry, i don’t understand

          Sam

          How to add modules

          learning how to use browser developers window for css changes

          S 1 Reply Last reply Reply Quote 0
          • S Do not disturb
            sdetweil @sdetweil
            last edited by sdetweil

            @sdetweil you make up your own messages…

            so, you have a push button on the screen (done by module_name,js)… when push button,
            send button name and 1 to node helper… when it gets 1, it uses serial port to send to arduino.

            when u let up on button , you send 0…

            write out what you WANT the system to do… (design)

            then implement THAT design

            Sam

            How to add modules

            learning how to use browser developers window for css changes

            N 1 Reply Last reply Reply Quote 0
            • N Offline
              nhpunch @sdetweil
              last edited by

              @sdetweil

              I’m doing what you said, but I do not know how to send it to the node_helper when the button is pressed.

              I’m so sorry.

              S 1 Reply Last reply Reply Quote 0
              • S Do not disturb
                sdetweil @nhpunch
                last edited by sdetweil

                @nhpunch this.sendSocketNotification(…,…)

                from the doc

                this.sendSocketNotification(notification, payload)

                notification String - The notification identifier.
                payload AnyType - Optional. A notification payload.

                If you want to send a notification to the node_helper, use the sendSocketNotification(notification, payload). Only the node_helper of this module will receive the socket notification.

                Example:

                this.sendSocketNotification('SET_CONFIG', this.config);
                

                you’ll see in the sample that this is used twice… once by the module_name.js to send the config over to the node_helper and once by the node_helper to send a new text string to the module_name.js to display

                its also used in your module, from the first post above

                  start: function () {
                    Log.info("Starting module: " + this.name);
                    this.sendSocketNotification('CONFIG', this.config)
                  },
                

                Sam

                How to add modules

                learning how to use browser developers window for css changes

                1 Reply Last reply Reply Quote 0
                • N Offline
                  nhpunch
                  last edited by

                  @sdetweil

                  I did my best, but I did not succeed.

                  I’m a real idiot.

                  Can you take a look at my code?

                  S 1 Reply Last reply Reply Quote 0
                  • S Do not disturb
                    sdetweil @nhpunch
                    last edited by

                    @nhpunch sure. Make a GitHub repo, and let me know

                    Sam

                    How to add modules

                    learning how to use browser developers window for css changes

                    1 Reply Last reply Reply Quote 0
                    • N Offline
                      nhpunch
                      last edited by nhpunch

                      https://github.com/nhpunch/sohard
                      

                      I created ‘is_Pushed’ and tried to work by repeating false, true when the button was pressed

                      S 1 Reply Last reply Reply Quote 0
                      • S Do not disturb
                        sdetweil @nhpunch
                        last edited by sdetweil

                        @nhpunch said in How to use the 'node_helper', 'serialport':

                        https://github.com/nhpunch/sohard

                        Ok, the fundamental problem is what happens in getDom()…

                        until getDom() returns this modules contribution to the single web page… that content is NOT IN the DOM… It is just in memory in your module.

                        so the jquery $(button) will not work. ($ means document.) and the content is NOT IN the document… (yet)

                        SO, you could change to use the non jquery

                        button.addEventListener('click', ()=> {
                           	
                           	//$(button).on("click", function(){
                           		if(self.hidden){
                           		//	$(overlay).fadeIn(1000);
                           		//	$(button).fadeTo(1000, 0.3);
                           		//	$(text).html('OFF');
                                                       Log.log("button pushed 'on' ")
                           			self.hidden = false;  
                           			self._isPushed = false;
                           		}else{
                           		//	$(overlay).fadeOut(1000);
                           		//	$(button).fadeTo(1000, 1);  
                           		//	$(text).html('ON');
                                                       Log.log("button pushed 'off' ")
                           			self.hidden = true;
                           			self._isPushed = true;
                           		}
                           	});
                           	return wrapper;
                        

                        but… all the data elements button, overlay and text will be long gone by the time the button is pushed.
                        so you will have to redesign finding them again (document.getElementByID()… or something, a different jquery selector.)

                        OR

                        you can push the jquery code off into a timeout handler (wait a second or 2)…
                        but you will still have to redesign how to find the button… as its data element on the stack of getDom() will be long gone.

                        think of getDom() as a person taking notes… they write it down on their notepad.
                        then LATER they edit a big document and add their text…

                        until they complete that task, you can search thru the big document all u want, the text will NOT be there…

                        when I used the sample above, the button responded…

                        u know you can open the developers window (npm start dev) and select the console window,
                        and messages from the module_name.js will show there

                        message from the node_helper will appear in the terminal window where u issued npm start dev & (note the & at the end to allow the prompt to come back)…

                        Sam

                        How to add modules

                        learning how to use browser developers window for css changes

                        N 1 Reply Last reply Reply Quote 0
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