function KelvinToFahrenheit(k) {
  return Math.trunc(((k - 273.15) * 9) / 5 + 32);
}
@filename co2_meter.js

@description CO2Meter provides methods for accessing status and data of a
CO2 meter. When creating a CO2Meter, it has to await `init()` to finish
before quering device status.