Method setSrefEthanol

libraries/SGP30/SGP30.h:86–86

18472 = average raw measured outside 22°C (example)

  uint16_t  getSrefH2()                        { return _srefH2; };
  //  18472 = average raw measured outside 22°C  (example)
  void      setSrefEthanol(uint16_t s = 18472) { _srefEth = s; };
  uint16_t  getSrefEthanol()                   { return _srefEth; };