Sesame

About the project

Access control using Arduino, RFID and electric strike.

Project info

Difficulty: Moderate

Platforms: Arduino

Estimated time: 1 day

License: MIT license (MIT)

Items used in this project

Hardware components

Raspberry Pi Rgb-led-matrix Expansion Module Raspberry Pi Rgb-led-matrix Expansion Module x 1
Grove - Solid State Relay Grove - Solid State Relay x 1
Arduino Leonardo Eth Arduino Leonardo Eth x 1
Electric strike Electric strike https://en.wikipedia.org/wiki/Electric_strike x 1
NXP MFRC522 based RFID module NXP MFRC522 based RFID module x 1

Story

This is my first Arduino project, I had this idea for some time and finally took the time to make it real. I am a web developer that is used to interpreted languages, it was really nice to try something different and learn C / C++.

Coding was really straight forward, thanks to this amazing RFID library: https://github.com/miguelbalboa/rfid

The outcome is what you can see here:

I had to modify the frame of the door to house the electric strike, which was one of the biggest challenges, since I don't really have much experience with woodworking. But everything went well!

Software

The system was based on this great example: AccessControl.ino. It uses the microcontroller's EEPROM to store RFID IDs.

The first time it runs, the user has to scan a master card / tag that it's going to later be used to add or remove cards / tags. Resulting in the following flow:

  1. ╔═══════════╗
  2. CARD READ
  3. ╚═════╤═════╝
  4. ╭──────┴──────╮
  5. ╭───┤ MASTER CARD ├───╮
  6. ╰─────────────╯
  7. ╭───┴───╮ ╭───┴───╮
  8. KNOWN FLIP
  9. ╭──────┤ CARD? ├──────╮ ADMIN
  10. ╰───────╯ MODE
  11. ╭───┴───╮ ╭───┴───╮ ╰───────╯
  12. ADMIN ADMIN
  13. ╭─┤ MODE? ├─╮ ╭─┤ MODE? ├─╮
  14. ╰───────╯ ╰───────╯
  15. ╭───┴────╮ ╭────┴──╮ ╭───┴────╮ ╭────┴───╮
  16. DENY STORE ALLOW REMOVE
  17. ACCESS CARD ACCESS CARD
  18. ╰────────╯ ╰───────╯ ╰────────╯ ╰────────╯

Schematics, diagrams and documents

Fritzing project

Breadboard image

Code

GitHub

Credits

Photo of gibatronic

gibatronic

Programmer, cyclist and beer lover from Brazil 🇧🇷

   

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