School of Engineering (SEN)

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Browsing School of Engineering (SEN) by Author "Aamir Riaz, Muhammad"

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    GSM based access control system with live database
    (University of Management and Technology, 4/8/2013) Yasir Shabbir Khan; Aamir Riaz, Muhammad; Maryam Masihuddin
    The project Advanced security system consists of micro controller as the main controlling unit. The keypad is interfaced with the microcontroller. The keypad takes the input of the given code and gives its corresponding success or failure signal to microcontroller. The micro controller is in turn connected with the GSM modem through MAX 232 for the pre-defined data transmission & reception. The keypad scanner at first holds/saves the data of the various code or mobile numbers of the valid persons provided by its internal memory. This state of the unit is called as “Stable mode”. Now we can switch to the “execution mode” for the authentication check. When a person enters his given code for the authentication, the keypad reader compares the code with the previously stored codes. Upon success, keypad scanner sends success signal to the microcontroller. Microcontroller transmits the pre-defined message to the user mobile number, which is saved in the memory through GSM modem. Upon failure access is not granted for that person. After message reception the user has the liberty to take decision for providing the access to that concerned person. He can send a reply message to the GSM modem unit for accessing, and then the controller provides access to him. If he doesn’t send a message or the sent message is invalid the control unit waits for some pre-defined time after which it doesn’t grant the access to the concerned person.