code: def SensorsGet(self, parameters = None, sensor_id = -1):
          
  
          url = ''
          if parameters is None and sensor_id <> -1:
              url = '/sensors/{0}.json'.format(sensor_id)
          else:
              url = '/sensors.json'
  
          if self.__SenseApiCall__(url, 'GET', parameters = parameters):
              return True
          else:
              self.__error__ = "api call unsuccessful"
              return False
docs: Retrieve sensors from CommonSense, according to parameters, or by sensor id. 
              If successful, result can be obtained by a call to getResponse(), and should be a json string.
              
              @param parameters (dictionary) (optional) - Dictionary containing the parameters for the api-call.
                      @note - http://www.sense-os.nl/45?nodeId=45&selectedId=11887
              @param sensor_id (int) (optional) - Sensor id of sensor to retrieve details from.
              
              @return (boolean) - Boolean indicating whether SensorsGet was successful.