Circuit Documentation

Summary

This document provides a detailed overview of a door locking system that utilizes an RFID reader, a membrane matrix keypad, and an Arduino UNO microcontroller. The system allows for the registration of new RFID cards, validation of access using a numeric code, and deletion of registered cards in case of loss. The system also includes a buzzer for audio feedback and LEDs for visual indicators.

Component List

1. Arduino UNO

   • Description: A microcontroller board based on the ATmega328P.
   • Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0, Power

2. RFID-RC522

   • Description: An RFID reader module.
   • Pins: VCC (3.3V), RST, GND, IRQ, MISO, MOSI, SCK, SDA

3. Magnetic Lock

   • Description: An electromagnetic lock.
   • Pins: S, GND

4. 12V Relay

   • Description: A relay module for switching high voltage devices.
   • Pins: NO, COM, NC, DC+, DC-, IN

5. LED: Two Pin (Red)

   • Description: A red LED.
   • Pins: Cathode, Anode

6. LED: Two Pin (Green)

   • Description: A green LED.
   • Pins: Cathode, Anode

7. Buzzer

   • Description: A piezoelectric buzzer.
   • Pins: PIN, GND

8. Membrane Matrix Keypad

   • Description: A 4x3 matrix keypad.
   • Pins: Row 1, Row 2, Row 3, Row 4, Column 1, Column 2, Column 3

9. PC817 Optotransistor

   • Description: An optocoupler.
   • Pins: Anode, Cathode, Collector, Emitter

10. 12V Power Supply

    • Description: A 12V DC power supply.
    • Pins: +, -

11. XL6009 Voltage Regulator

    • Description: A DC-DC step-up voltage regulator.
    • Pins: OUT +, OUT -, IN +, IN -

Wiring Details

Arduino UNO

• 3.3V connected to RFID-RC522 VCC (3.3V)
• GND connected to PC817 Optotransistor Cathode, XL6009 Voltage Regulator IN -, RFID-RC522 GND, Buzzer GND, LED (Green) Anode, LED (Red) Anode
• Vin connected to XL6009 Voltage Regulator IN +
• A0 connected to Membrane Matrix Keypad Column 3
• A1 connected to Membrane Matrix Keypad Column 2
• A2 connected to Membrane Matrix Keypad Column 1
• A3 connected to Membrane Matrix Keypad Row 4
• A4 connected to Membrane Matrix Keypad Row 3
• A5 connected to Membrane Matrix Keypad Row 2
• D13 connected to RFID-RC522 SCK
• D12 connected to RFID-RC522 MISO
• D11 connected to RFID-RC522 MOSI
• D10 connected to RFID-RC522 SDA
• D9 connected to RFID-RC522 RST
• D7 connected to Membrane Matrix Keypad Row 1
• D5 connected to LED (Red) Cathode
• D4 connected to LED (Green) Cathode
• D3 connected to PC817 Optotransistor Anode
• D2 connected to Buzzer PIN

RFID-RC522

• VCC (3.3V) connected to Arduino UNO 3.3V
• GND connected to Arduino UNO GND
• SCK connected to Arduino UNO D13
• MISO connected to Arduino UNO D12
• MOSI connected to Arduino UNO D11
• SDA connected to Arduino UNO D10
• RST connected to Arduino UNO D9

Magnetic Lock

• S connected to XL6009 Voltage Regulator OUT +
• GND connected to 12V Relay NO

12V Relay

• NO connected to Magnetic Lock GND
• COM connected to XL6009 Voltage Regulator OUT -
• DC+ connected to XL6009 Voltage Regulator OUT +
• DC- connected to XL6009 Voltage Regulator OUT -
• IN connected to PC817 Optotransistor Collector

LED: Two Pin (Red)

• Anode connected to Arduino UNO GND
• Cathode connected to Arduino UNO D5

LED: Two Pin (Green)

• Anode connected to Arduino UNO GND
• Cathode connected to Arduino UNO D4

Buzzer

• PIN connected to Arduino UNO D2
• GND connected to Arduino UNO GND

Membrane Matrix Keypad

• Column 3 connected to Arduino UNO A0
• Column 2 connected to Arduino UNO A1
• Column 1 connected to Arduino UNO A2
• Row 4 connected to Arduino UNO A3
• Row 3 connected to Arduino UNO A4
• Row 2 connected to Arduino UNO A5
• Row 1 connected to Arduino UNO D7

PC817 Optotransistor

• Anode connected to Arduino UNO D3
• Cathode connected to Arduino UNO GND
• Collector connected to 12V Relay IN
• Emitter connected to XL6009 Voltage Regulator OUT -

12V Power Supply

• + connected to XL6009 Voltage Regulator OUT +
• - connected to XL6009 Voltage Regulator OUT -

XL6009 Voltage Regulator

• IN + connected to Arduino UNO Vin
• IN - connected to Arduino UNO GND
• OUT + connected to 12V Power Supply +, Magnetic Lock S, 12V Relay DC+
• OUT - connected to 12V Power Supply -, 12V Relay COM, 12V Relay DC-, PC817 Optotransistor Emitter

Documented Code

/*
 * Ce sketch Arduino contrôle un système de verrouillage de porte utilisant RFID
 * et un clavier matriciel. Le système permet d'enregistrer de nouvelles cartes
 * RFID, de valider l'accès avec un code numérique, et de supprimer des cartes
 * enregistrées en cas de perte. Un buzzer émet des sons différents pour les
 * actions de validation et d'enregistrement.
 */

#include <SPI.h>
#include <MFRC522.h>
#include <Keypad.h>

#define RST_PIN 9
#define SS_PIN 10
#define RED_LED_PIN 5
#define GREEN_LED_PIN 4
#define RELAY_PIN 3
#define BUZZER_PIN 2
#define MAX_ATTEMPTS 5
#define ADDITIONAL_ATTEMPTS 3
#define ALARM_DURATION 60000 // 1 minute in milliseconds
#define LOCK_DURATION 3600000 // 1 hour in milliseconds

MFRC522 mfrc522(SS_PIN, RST_PIN);

const byte ROWS = 4; // four rows
const byte COLS = 3; // three columns
char keys[ROWS][COLS] = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
};
byte rowPins[ROWS] = {7, A5, A4, A3};
byte colPins[COLS] = {A2, A1, A0};
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

byte authorizedUIDs[10][4];
int numAuthorizedUIDs = 0;

int failedAttempts = 0;
int additionalFailedAttempts = 0;
bool isLocked = false;
unsigned long lockStartTime = 0;

void setup() {
  Serial.begin(9600);
  SPI.begin();
  mfrc522.PCD_Init();
  pinMode(RED_LED_PIN, OUTPUT);
  pinMode(GREEN_LED_PIN, OUTPUT);
  pinMode(RELAY_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  digitalWrite(RE