code: func (s *SHT3xDriver) SerialNumber() (sn uint32, err error) {
  	ret, err := s.sendCommandDelayGetResponse([]byte{0x37, 0x80}, nil, 2)
  	if nil == err {
  		sn = (uint32(ret[0]) << 16) | uint32(ret[1])
  	}
  
  	return
  }
docs: // SerialNumber returns the serial number of the chip