docs: def knx2_to_float(knxdata):
      """Convert a KNX 2 byte float object to a float"""
      if len(knxdata) != 2:
          raise KNXException("Can only convert a 2 Byte object to float")
  
      data = knxdata[0] * 256 + knxdata[1]
      sign = data >> 15
      exponent = (data >> 11) & 0x0f
      mantisse = float(data & 0x7ff)
      if sign == 1:
          mantisse = -2048 + mantisse
  
      return mantisse * pow(2, exponent) / 100