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.

def SensorsGet(self, parameters = None, sensor_id = -1):
        """
            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.
        """

        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