config statistic 'property'

	option limit_enabled '0'     # 1, limit enabled; 0, limit disabled

	option monthly_enabled '0'     # 1, monthly enabled; 0, monthly disabled

	option limit '0'     # threshold value in B

        option current_date '0'       # current date time

        option daily_flow '0'         # daily flow

	option warning_percent '90'     # warning in oled when statistics reached

	option monthly '0'     # value in B

	option due '1'     # the due day of every month

	option next_due '0'     # the next due date in time_t

	option limit_reached '0'     # if the limit reached; 0, limit not reached; 1, warning percent reached; 2, limit reached

	option free_duration_enabled '0'     # 1, free duration enabled; 0, free duration disabled

	option free_duration_start '00:00'     # free duration start time in "hh:mm"

	option free_duration_end '00:00'     # free duration end time in "hh:mm"

	option free_duration_when_roaming '0'     # 1, enabled when roaming; 0, disabled when roaming
