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4.2.1 Warning Alert
In the event of invasion criminal happen when the status door is closed and
electromagnetic lock in the ON state, the door will open by the someone. Then the alarm
will automatically ON and the admin user will received an SMS alerts “ALERT –
ALARM TRIGGERED!” from the GSM modem.
Figure 4.5 Block Diagram Security Warning Alert
4.2.2 Users
If the users does not sign and send through a command to lock or unlock the door
system, the door cannot be opened or closed. At the same time, users will received an
SMS alert “DENIED – UNREGISTERED USER” from the GSM modem.
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