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Circumstance data of building such as fire accident smoke, robberpsilas body information, temperature and humidity signal, etc is acquired by different kinds of sensor unit. Single chip microprocessor (SCM) AT89C51 processes data signal collection and realize telephone automatically dialing-alarming when there is unusual condition, as well as it controls wireless transceiver chip nRF905 to complete...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.