fetchertest.js

const FroniusFetcher = require("./FroniusFetcher");
const config = {
  ip: "192.168.200.173",
  wattConversionOptions: {
    enabled: true,
    threshold: 1200,
    numDecimalDigits: 2,
  },
};

async function fetch() {
  const fetcher = new FroniusFetcher(config);
  // const data = await fetcher.fetch();
  const data = await fetcher.fetchDummyData();
  console.log(data);
  console.log(getWattString(data.energyTotal));
  console.log(getWattString(data.currentEnergy));
}

function getWattString(value) {
  const wattConversionOptions = config.wattConversionOptions;
  const threshold = wattConversionOptions.threshold;
  let wattString = "W";
  let displayValue = value;

  if (wattConversionOptions.enabled) {
    switch (true) {
      // GigaWatt
      case value > threshold * Math.pow(1000, 2):
        displayValue = (value / Math.pow(1000, 3)).toFixed(wattConversionOptions.numDecimalDigits);
        wattString = "GW";
        break;
      // MegaWatt
      case value > threshold * 1000:
        displayValue = (value / Math.pow(1000, 2)).toFixed(wattConversionOptions.numDecimalDigits);
        wattString = "MW";
        break;
      // KiloWatt
      case value > threshold:
        displayValue = (value / 1000).toFixed(wattConversionOptions.numDecimalDigits);
        wattString = "KW";
        break;
      default:
        displayValue = Math.round(value);
        wattString = "W";
    }
  } else {
    displayValue = Math.round(value);
  }

  return `${displayValue} ${wattString}`;
}

setInterval(async () => {
  await fetch();
}, 3000);