text: #!/usr/bin/env python
  #
  # This is the library for Grove Base Hat.
  #
  # Temper(ature) Classes
  #
  
  '''
  ## License
  
  The MIT License (MIT)
  
  Grove Base Hat for the Raspberry Pi, used to connect grove sensors.
  Copyright (C) 2018  Seeed Technology Co.,Ltd. 
  
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  THE SOFTWARE.
  '''
  import math
  import threading
  from grove.i2c import Bus as I2C
  from grove.temperature import Temper
  from upm.pyupm_mcp9808 import MCP9808
  
  class TemperMCP9808(Temper):
      def __init__(self, address=0x18):
          self.mcp = MCP9808(I2C.MRAA_I2C,address=address)
          self.mcp.setMode(True)  # Celsius
          self._resolution = Temper.RES_1_2_CELSIUS
  
      def _derive_res(self, res):
          ares = -1
          if res >= Temper.RES_1_2_CELSIUS:
              ares = MCP9808.RES_LOW
          elif res >= Temper.RES_1_4_CELSIUS:
              ares = MCP9808.RES_MIDDLE
          elif res >= Temper.RES_1_8_CELSIUS:
              ares = MCP9808.RES_HIGH
          elif res >= Temper.RES_1_16_CELSIUS:
              ares = MCP9808.RES_PRECISION
  
          if ares < 0:
              return False
          self.mcp.setResolution(ares)
          # print("ares = {}".format(ares))
          return True
  
      @property
      def temperature(self):
          return self.mcp.getTemp()
  
  