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

Display temperature over network

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  • S Offline
    sdetweil @linuxdxs
    last edited by Mar 26, 2020, 4:22 PM

    @linuxdxs you can write code to start the web server… node web server using express library is very short…
    I don’t know python that well… I’m sure a google search will give u results…

    so, whatever u feel more comfortable with

    once u set that up you can use your browser to invoke the function on the pi0 to return the temp…

    once that is working, then u can build a module to do the same…
    using my sample module might help on the last step

    https://github.com/sdetweil/SampleModule

    Sam

    How to add modules

    learning how to use browser developers window for css changes

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    • E Offline
      ember1205
      last edited by Mar 26, 2020, 4:23 PM

      Why not write the module that goes into MM and then use a script on the thermometer to update the module when the temp changes? If your thermometer is measuring the internal temp of a home, and that changes infrequently because the heat or AC is on, there’s no point in polling the thermometer every five minutes to see what the temp is. :)

      S 1 Reply Last reply Mar 26, 2020, 4:24 PM Reply Quote 0
      • S Offline
        sdetweil @ember1205
        last edited by Mar 26, 2020, 4:24 PM

        @ember1205 thats another way, but takes more skill to trigger into MM…

        Sam

        How to add modules

        learning how to use browser developers window for css changes

        E 1 Reply Last reply Mar 26, 2020, 4:29 PM Reply Quote 0
        • E Offline
          ember1205 @sdetweil
          last edited by Mar 26, 2020, 4:29 PM

          @sdetweil Agreed. And, it would still require a method for the module to “register” with the remote thermometer of its existence when it loads so that initial temp and updates will be transmitted.

          S 1 Reply Last reply Mar 26, 2020, 4:40 PM Reply Quote 0
          • S Offline
            sdetweil @ember1205
            last edited by Mar 26, 2020, 4:40 PM

            @ember1205 based on @linuxdxs comments and questions, I think starting slow is a better choice…

            Sam

            How to add modules

            learning how to use browser developers window for css changes

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            • S Offline
              stampeder
              last edited by Mar 26, 2020, 6:45 PM

              If you are using the Raspberry Pi Zero W’s they come with wifi built in. I just finished getting the MMM-temp-DS18B20 module issue fixed and working. The next thing would be to use MMM-MQTT. This will allow you to have a broker that will collect all the readings and store them in a set of topics. Then you just need the MMM-MQTT-client to read the topics and display the readings. It sounds way more complicated than it really is. I recently wrote a blog posting on http://www.desert-home.com/ called http://www.desert-home.com/2020/02/temperature-adventures-with-rasppi.html. It explains a lot of it. Then you just need to setup the MQTT-clients to read the temperatures. Good luck. Should be a fun project.

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              • P Offline
                PILuke
                last edited by Mar 29, 2020, 9:51 AM

                @linuxdxs you can use this simple module MMM-RemoteTemperature and from your termometer you only send an HTTP POST request.
                You choose the udate interval and all the MM, with this module, will update their value when you send the HTTP POST.
                I hope this help you.

                D 1 Reply Last reply Mar 29, 2020, 5:05 PM Reply Quote 2
                • D Offline
                  davidoesch @PILuke
                  last edited by Mar 29, 2020, 5:05 PM

                  @PILuke yep

                  Had the same challenge

                  3 DHT sensors on 2 different PIs

                  solution

                  on the PI’s I have a cron job wich runs a python program to extract temperature and send it via REST to a MMM-remote temperature

                  pseudo code json to send

                              data = {'temp': round(temperature, 1),
                                      'humidity': round(humidity, 0),
                                      'sensorId': str(SensorID)}
                              post_request(json.dumps(data), 'http://192.168.x.x:8080/remote-temperature', {'Content-type': 'application/json', 'Accept': 'text/plain'})
                  

                  installed MMM-RemoteTemperature, 3 ids

                  			module: 'MMM-RemoteTemperature',
                  			position: 'bottom_center',
                  			config: {
                  				sensorId: '1',
                  				icon: 'home',
                  				showTime: false
                  			}
                  		},
                  		{
                  			module: 'MMM-RemoteTemperature',
                  			position: 'bottom_center',
                  			config: {
                  				sensorId: '2',
                  				icon: 'couch',
                  				showTime: false
                  			}
                  		},
                  				{
                  			module: 'MMM-RemoteTemperature',
                  			position: 'bottom_center',
                  			config: {
                  				sensorId: '3',
                  				icon: 'map-marker-alt',
                  				showTime: false
                  			}
                  		},
                  

                  cheers

                  1 Reply Last reply Reply Quote 1
                  • L Offline
                    lavolp3 Module Developer @linuxdxs
                    last edited by lavolp3 Mar 29, 2020, 9:46 PM Mar 29, 2020, 9:42 PM

                    EDIT: Sorry, didn’t read everything.
                    tl;dr: what @stampeder said…

                    @linuxdxs I personally would use MQTT for that purpose. It’s a very lightweight way of regularly publishing data through your network and fetching it with any device you want to. It’s also cross platform. You could use your android mobile as well.

                    I use MQTT to fetch data from and send controls to my tasmota plugs and it works very well.
                    There’s a module called MMM-MQTT-Bridge already published that could be used and my soon-to-be-published MMM-Tasmota would work as well as a basis.
                    On the Raspi’s you would need an MQTT server like mosquitto.
                    May not sound like the easiest way but on the publisher side it’s not more than a few lines of code.

                    How to troubleshoot modules
                    MMM-soccer v2, MMM-AVStock

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