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Design and Development of a Portable Wireless Access Control Device Equipped with Energy Harvesting Mechanism

Mostafa, Roya | 2023

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57286 (05)
  4. University: Sharif University of Technology
  5. Department: Electronics-Digital
  6. Advisor(s): Farhadi, Alireza
  7. Abstract:
  8. This MSc. thesis in concerned with the design, implementation and performance evaluation of a self-powered attendance control system. Using a solar energy harvesting system that is designed and developed and a fingerprint sensor, the system ensures reliable and stable authentication. The attendance control device is designed based on the ESP32 microcontroller, capable of establishing a connection to the internet via Wi-Fi or Ethernet which facilitates the storage and processing of traffic data on internet servers, allowing for remote access to this processed data. In addition to the server, several methods such as web server and UART serial interface have been implemented to send commands and receive traffic information from the device. Given the significance of precise timing within this system, an external Real-Time Clock is incorporated along with an OLED display which allows for the monitoring of the device internet connection status, server connection status, and provides real-time updates about the time and date. To implement a self-powered power supply due to the instability of sunlight, a lithium-ion battery is used as an energy storage source. Considering the importance of proper charging and discharging cycles for maintaining lithium-ion battery’s health, the battery is charged by a battery management circuit when sufficient sunlight is present. By using the appropriate power path management in this system, solar energy serves as the primary power source for the attendance control device and when there is a lack of energy, the battery steps in to supplement the device current requirements. Upon evaluating the final system, it can be concluded that an initial prototype of a self-powered biometric access control system has been successfully developed, which gives the desired result of recording stable and reliable traffic under laboratory conditions. Further refinements to the system design are suggested to transform this prototype into a fully functional self-powered biometric access control system
  9. Keywords:
  10. Internet of Things ; Power Management ; Solar Energy Harvesting ; Self-Powered Power Supply ; Attendance Control System ; ESP32 Microcontroller

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