PT-BR
Controle de acesso com Arduino via leitura de Tag RFID.

Esta versão possui um menu CLI escondido que é mostrado quando o Arduino receber o caracter 's' via comunicação serial (Baud 9600). Através da comunicação sérial é possível cadastrar e excluir um ID ou cadastrar e excluir o ID do master bastando para isso saber o número da Tag a ser cadastrado / excluído no formato hexadecimal. Pode-se usar o próprio leitor para saber previamente o número hexadecimal da Tag ou usar outro leitor de RFID.

Usando um programa externo também é possível capturar os dados enviados pela comunicação serial e criar um arquivo de log do sistema o qual pode registrar os ID lidos e identificá-los por horário.

EN
Access control with Arduino via RFID Tag reading.

This version has a hidden CLI menu which is shown when the Arduino receives the 's' character via serial communication (Baud 9600). Through serial communication it is possible to register and delete an ID or register and delete the master ID just knowing the Tag number to be registered/deleted in hexadecimal format. You can use the reader itself to know in advance the hexadecimal number of the Tag or use another RFID reader.

Using an external program it is also possible to capture the data sent by serial communication and create a log file system which can record the read IDs and identify them by time.

Project improved by Marco Barbosa ---> https://github.com/mrc6/arduino-access-control

This is a MFRC522 library example; for further details and other examples see: https://github.com/miguelbalboa/rfid

• Easy User Interface

  Just one RFID tag needed whether Delete or Add Tags. You can choose to use Leds for output or Serial LCD module to inform users.

• Stores Information on EEPROM

  Information stored on non volatile Arduino's EEPROM memory to preserve Users' tag and Master Card. No Information lost if power lost. EEPROM has unlimited Read cycle but roughly 100,000 limited Write cycle.

• Security To keep it simple we are going to use Tag's Unique IDs. It's simple and not hacker proof.

  @license Released into the public domain.

  Pin Layout The following table shows the typical pin layout used:

[1] (1, 2, 3) Configurable, typically defined as RST_PIN in sketch/program.
[2] (1, 2, 3) Configurable, typically defined as SS_PIN in sketch/program.
[3] The SDA pin might be labeled SS on some/older MFRC522 boards.
[4] Source: miguelbalboa/rfid#111 (comment) . Important: If your micro controller supports multiple SPI interfaces, the library only uses the default (first) SPI of the Arduino framework.

CLI Menu
s - show this CLI Menu
c - register new ID
e - delete ID
l - list all registered IDs
m - delete master ID
n - register new master ID
x - delete ALL registered IDs

• Implementation This example was tested on Arduino Uno hardware. The SS and RST pins on the SPI interface have been configured for pins 9 and 8 respectively.