MagicMirror² v2.14.0 is available! For more information about this release, check out this topic.

Simple Text that reads a .txt file

  • Hey,
    So I have a python script that uses facial recognition and prints out the name of the person. I want this to display on the magic mirror. Guidance on how to do it would be welcome as well.

  • @Jackkt you need to use the node_helper module to launch your python script, and capture the output of the python script… then send that up to the module.js via sendSocketNotification…

    then the module needs to signal updateDom() to tell MM there is new content, and it will call back at getDom() to get the new content, where u format your html to be shown.


    const { exec } = require('child_process');
    exec('python your_script', (error, stdout, stderr) => {
      if (error) {
        console.error(`exec error: ${error}`);
      console.log(`stdout: ${stdout}`);
       this.sendSocketNotification('some id string', stdout);
      console.log(`stderr: ${stderr}`);


    socketNotificationReceived: function(notification, payload) {
       if( notification ==='some id string') {
       var save_payload=payload)
    getDom: function (){
       create the html here using save_payload)
       return created_html
       MM will inject the html in the div for your module

    you can use my sample module for starters…

    check out the difference between exec (one time) and spawn (send multiple responses over time)

  • @sdetweil Thanks for the response. Im having trouble making the module(I have no experience and the "Head first developing MM module for extreme beginner"didnt work). Also The python script can run in the background and can output into a .txt file. Can I just edit helloworld to just print the thing in the text file? Sorry if this is stupid.

  • @Jackkt Also the text file updates every 5 seconds by the results of the python script

  • @Jackkt if the python script can be changed to just write to the screen, you can use spawn instead. And it can send u info every time it writes

  • @sdetweil Hey, I get a syntax error from “const { exec } = require(‘child_process’); unexpected token {” its the one before exec. Get the same from spawn.

  • @Jackkt Also without the {} the error is “unexpected identifier” for

  • @Jackkt that leading quote shouldn’t be there

  • @sdetweil I was just quoting sorry it looks like:
    const { exec } = require(‘child_process’);


    const exec = require(‘child_process’);

  • @Jackkt ok. I just cut/pasted it from a working module.

    When posting code or config in the forum, please use the markup syntax. 3 backticks (key left of number 1) before your content on a separate line
    And 3 more after on a separate line

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