• Reading of a card serving as a key through a lock (RFID proximity card reader).
• Response of the reading device to card application.
• If a valid card is inserted, the LEDs light up green.
• In the event of an invalid card being presented, the LEDs turn red and a buzzer sounds.
• Writing of information about the inserted card in the register (database).
• Communication between the reading device and the server, involving the transmission of card assignment and card information.
• Communication between the server and the web application, allowing the presentation of the corresponding results from the database.
• Possibility of CRUD operations for access cards:
• Adding a new card.
• Deleting a card.
• Changing the name of the card owner.

Programming languages and technologies used for implementation: Python, SQL.

• Communication between devices: MQTT.
• Reading device: Raspberry Pi (for the lab acting as an electronic lock).
• Peripherals:
  • RFID proximity card reader.
  • Sounder - buzzer.
  • WS2812 line of programmable RGB LEDs.
• Operating systems: Linux Debian.
• Database: SQLite.