Underfloor heating with Devireg and NTC Sensors

/**************** START CHANGE HERE ****************/
let CONFIG = {
  scanInterval: 10, //secs, this will run a timer for every 30 seconds, that will fetch the voltage
  voltmeterID: 100, //the ID of the voltmeter - When we install the add on, the device will define this number

  /**
   * Applies some math on the voltage and returns the result. This function is called every time the voltage is measured
   * @param {Number} voltage The current measured voltage
   * @returns The temperature based on the voltage
   */
  calcTemp: function (voltage) {
    const constVoltage = 10;
    const R1 = 10000;
    const A = 0.0010377385695278978;
    const B = 0.00021633455581572119;
    const C = 2.654857502585547e-7;
    
    const R2 = R1 * (voltage / (constVoltage - voltage));
    const logR2 = Math.log(R2);
    let T = 1.0 / (A + (B + C * logR2 * logR2) * logR2);
    T = T - 273.15; // Celcius
    //T = (T - 273.15) * 9/5 + 32; // Fahrenheit
    
    return { temperature: T, voltage: voltage, resistance: R2 };
  },

  /**
   * This function is called every time when a temperature is read
   * @param {Object} data Object containing temperature, voltage, and resistance
   */
  onTempReading: function (data) {
    const temperature = data.temperature;
    const voltage = data.voltage;
    const resistance = data.resistance;
    
    let relayStatus;
    const currentTime = new Date();
    const currentHour = currentTime.getHours();
    
    // Determine temperature thresholds based on time of day
     
     
    //if the temperature is less than 16, turn the first output on
    let thresholdLow = 10; // Default threshold
    //if the temperature is greater than 22 turn the first output off
    let thresholdHigh = 20; // Default threshold 
 
    
    // Night setback (natsænkning)
    if (currentHour >= 10 || currentHour < 6) { // Between 22:00 and 06:00
      thresholdLow = 10; // Adjust threshold for cooler temperature during the night
      thresholdHigh = 16; // Adjust threshold for cooler temperature during the night
  
    }
    
    // Check temperature against thresholds
    if (temperature > thresholdHigh) {
       Shelly.call("Switch.Set", {
           id: 0,
           on: false
       });
       relayStatus = "Turned off";
    } else if (temperature < thresholdLow) {
       Shelly.call("Switch.Set", {
           id: 0,
           on: true
      });
      relayStatus = "Turned on";
    } else {
       relayStatus = "Unchanged";
    }
    
    console.log("Temperature: " + temperature.toFixed(2) + " °C | Voltage: " + voltage.toFixed(2) + "V | Resistance: " + resistance.toFixed(2) + "Ω | Hour: " + currentHour + ":00 |     Relay: " + relayStatus);

  },
};
/**************** STOP CHANGE HERE ****************/

function fetchVoltage() {
  //Fetch the voltmeter component
  const voltmeter = Shelly.getComponentStatus(
    "voltmeter:" + JSON.stringify(CONFIG.voltmeterID)
  );

  //exit if can't find the component
  if (typeof voltmeter === "undefined" || voltmeter === null) {
    console.log("Can't find the voltmeter component");
    return;
  }

  const voltage = voltmeter["voltage"];

  //exit if can't read the voltage
  if (typeof voltage !== "number") {
    console.log("can't read the voltage or it is NaN");
    return;
  }

  //get the temperature based on the voltage
  const data = CONFIG.calcTemp(voltage);

  //exit if the temp isn't calculated correctly
  if (typeof data !== "object") {
    console.log("Something went wrong when calculating the temperature");
    return;
  }

  if (typeof CONFIG.onTempReading === "function") {
    CONFIG.onTempReading(data);
  }
}

//init the script
function init() {
  //start the timer
  Timer.set(CONFIG.scanInterval * 1000, true, fetchVoltage);

  //fetch the voltage at run
  fetchVoltage();
}

init();