The first one is a days-left module that calculates how many days are to or from a given date:

Module.register("days-left", {
  // config
  defaults: {
    textColor: "white",
    dates: [
      // format 'dd/MM/yyyy'
      { name: "2025", date: "01/01/2025" },
      { name: "2026", date: "01/01/2026" },
    ],
  },
  
  start: function () {
    var self = this;
    setInterval(function () {
      self.updateDom(); // updates instantly.
    }, 1000); //perform every 1000 milliseconds.
  },

  getDaysLeft: function (i) {
    const date = Date.now();
    
    const formattedDate = dateFormat(this.config.dates[i].date);
    const targetDate = new Date(formattedDate);
    
    const difference = targetDate - date;
    
    return Math.floor(difference / (1000 * 60 * 60 * 24));
  },


  dateFormat: function (date) {
    const dd = date.split("/")[0];
    const mm = date.split("/")[1];
    const yyyy = date.split("/")[2];

    const formattedDate = mm + "/" + dd + "/" + yyyy;
    return formattedDate;
  },


  getDom: function () {
    var wrapper = document.createElement("div");
    wrapper.style.color = this.config.textColor;

    for (let i in this.config.dates) {
      var days = getDaysLeft(i);
      var text = document.createTextNode(
        this.config.dates[i].name + ": " + days + " päeva pärast"
      );

      wrapper.appendChild(text);

      wrapper.appendChild(document.createElement("br"));
    }
    return wrapper;
  },
});

I have my suspection on the indexing of ‘this.config.dates[i].name’ but I’m not sure.

And the other module is one that reads temp and humidity from the DHT11 sensor:

Module.register("temperatuur", {

    // config
    defaults: {
        textColor: "white",
      },
    
    start: function () {

    },

    notificationReceived: function(notification) {
      switch(notification) {
        case "DOM_OBJECTS_CREATED":

          setInterval(()=>{
            this.updateDom(500);
          }, 1000);
          break;
      }
    },
    
    getDom: function () {
      var wrapper = document.createElement("div");
      wrapper.style.color = this.config.textColor;

      this.sendSocketNotification("READ_FROM_SENSOR");
      var element = document.createElement("p");
      element.id = "text";

      wrapper.appendChild(element);
      
      return wrapper;
    },

    socketNotificationReceived: function(notification, payload) {
      switch(notification) {
        case "READ":
          var p = document.getElementById("text");
          p.innerHTML = payload;
          break
      }
    },
});
  

With this one I also used a node_helper.js file:

var NodeHelper = require("node_helper")

module.exports = NodeHelper.create({

  start: function() {
    this.temperature = '';
    this.humidity = '';
  },

  readFromSensor: function () {
    var sensor = require("node-dht-sensor")    
    sensor.read(11, 4, function(err, temperature, humidity) {
      if (!err) {
        return {temperature: temperature, 
                humidity: humidity,
        };
      }
    });
  },

  getTemperature: function () {
    return this.readFromSensor().temperature;
  },

  getHumidity: function () {
    return this.readFromSensor().humidity;
  },


  socketNotificationReceived: function(notification) {
    switch(notification) {
      case "READ_FROM_SENSOR":
        var payload = (this.getTemperature() + "°C" + " - " + this.getHumidity() + "%");
        this.sendSocketNotification("READ", payload);
        break;
    }
  },
})

With the last one I have tested the read function and it works when run from a separate .js file. I’ve also tested that both modules can display simple string text.