this is the scenario $*$Scenario$*$

The SafeHome company has developed an innovative hardware box that implements wireless Internet $(802\mathrm{.}11)$ connectivity in a very small form factor $($the size of a matchbook$).$ The idea is to use this technology to develop and market a comprehensive home automation product line. This would ultimately provide not only security functions, but also would enable control over telephone answering machines, lights, heating, air conditioning, and home entertainment devices. The first generation of the system, described here, will only focus on home security since that is a market the public readily understands.

System Actors

The actors for this system are the Household User and the Configuration Manager. The Household User can arm or disarm the system and specify the activation code. The role of the Configuration Manager will be to successfully log in and be capable of installing the initial system, add or remove devices and change activation codes.

Hardware and Controls

$$ Central processor: There is a central processor $($CP$)$ located on the customer$$s premises. The CP software can run on any computer with an external broadband Internet connection or a modem, as well as an $802\mathrm{.}11$b wireless card. The CP uses its broadband Internet connection and$/$or modem to communicate with the SafeHome corporate site, and with a monitoring company $($that can call emergency services as needed$).$ If both broadband and modem are installed, they can act as backups for each other. The CP also acts as a wireless Internet base station for communication with the devices described below. The CP could run on any home PC; we assume however, that to ensure the integrity of the security system, the software would actually run on a dedicated computer $$ so crashes of other programs, viruses, etc. cannot circumvent the security. This dedicated computer would have an uninterruptible power supply, but would lack such things as a video card, keyboard and screen, commonly found in a home PC$.$

$$ Sensor and actuator devices: There are a variety of devices that communicate with the CP$.$ Some of these are sensors $($e$.$g$.,$ motion sensors placed internally and externally, sensors that detect whether a door or window is open, fire detectors, smoke detectors, carbon monoxide detectors, basement water detectors, etc.$).$ Some are alarm signalers $($siren$,$ flashing light, etc.$).$ Some are cameras that can send digital pictures to the CP and can be panned or zoomed. It is the intent of the company that the line of devices would be expanded in the future, so the interface with the CP needs to be flexible to allow for innovation. The devices need a power supply and may have battery backups $$ details such as that are out of the scope of this document. The main thing to know at this point is that a significant number of devices can be purchased, installed physically and then configured with the software system so that the software system can communicate with them.

$$ Special Hardware Control panels: These are hardware devices that provide a simple user interface to the system. Like the devices described above, they communicate with the CP wirelessly. They allow for such basic functions as arming and disarming the system. Normally there would be one in the home near the front door, but there could be others $($e$.$g$.,$ at other exterior doors or in a bedroom$).$

$$ Web browser: The control panel described above is used for the simplest of operations. However, to access the full functionality of SafeHome, its users must connect to the CP via a web browser. The CP runs a web server, accessible over its wireless connection $($or through the SafeHome corporate web site$)$; this provides the full user interface $($UI$)$ capability for the system. The web UI is a superset of the capability available on the hardware control panels.

$$ SafeHome corporate web site. Users who are traveling can have full access to their home system by connecting to the SafeHome corporate web site. This site routes all its communication to the CP located in the client$$s home. Direct external connection to the CP is not allowed to help prevent denial$-$of$-$service attacks and other for.ms of hacking. and these are the cases i have Disarm the system.used in my use case uml diagram $.$ arm the securitInstall the initial system.y system. Disarm the system. specify the activation code. login$.$ Install the initial system. Add devices. remove devices. change activation code. now Write a brief description for each use case.