code: def begin(self):
  		
  		# Check manufacturer and device ID match expected values.
  		mid = self._device.readU16BE(MCP9808_REG_MANUF_ID)
  		did = self._device.readU16BE(MCP9808_REG_DEVICE_ID)
  		self._logger.debug('Read manufacturer ID: {0:04X}'.format(mid))
  		self._logger.debug('Read device ID: {0:04X}'.format(did))
  		return mid == 0x0054 and did == 0x0400
docs: Start taking temperature measurements. Returns True if the device is 
  		intialized, False otherwise.