Arduino RFID Door Lock System with LCD Display and Servo Motor

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Le code Arduino

Voici un point de départ complet. Copie-le dans l'Arduino IDE, installe les bibliothèquesMFRC522,LiquidCrystal_I2C etServo, puis remplace tagAutorise par l'UID de ta carte.

#include <SPI.h>
#include <MFRC522.h>
#include <LiquidCrystal_I2C.h>
#include <Servo.h>

#define RST_PIN 9
#define SS_PIN 10

#define LED_ROUGE 4
#define LED_BLEUE 3
#define LED_VERTE 2
#define BUZZER 5
#define SERVO_PIN 6

MFRC522 mfrc522(SS_PIN, RST_PIN);
LiquidCrystal_I2C lcd(0x27, 16, 2);
Servo serrure;

String tagAutorise = "A1B2C3D4"; // UID de ta carte autorisée

void setup() {
  Serial.begin(9600);
  SPI.begin();
  mfrc522.PCD_Init();

  pinMode(LED_ROUGE, OUTPUT);
  pinMode(LED_BLEUE, OUTPUT);
  pinMode(LED_VERTE, OUTPUT);
  pinMode(BUZZER, OUTPUT);

  serrure.attach(SERVO_PIN);
  serrure.write(0); // porte verrouillée

  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Badgez pour");
  lcd.setCursor(0, 1);
  lcd.print("ouvrir la porte");
}

void loop() {
  if (!mfrc522.PICC_IsNewCardPresent()) return;
  if (!mfrc522.PICC_ReadCardSerial()) return;

  String uid = "";
  for (byte i = 0; i < mfrc522.uid.size; i++) {
    if (mfrc522.uid.uidByte[i] < 0x10) uid += "0";
    uid += String(mfrc522.uid.uidByte[i], HEX);
  }
  uid.toUpperCase();

  if (uid == tagAutorise) {
    // ACCÈS AUTORISÉ
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("ACCES AUTORISE");
    lcd.setCursor(0, 1);
    lcd.print("Bienvenue !");

    digitalWrite(LED_VERTE, HIGH);
    digitalWrite(LED_ROUGE, LOW);
    serrure.write(90); // déverrouille la porte
    delay(3000);
    serrure.write(0);
    digitalWrite(LED_VERTE, LOW);
  } else {
    // ACCÈS REFUSÉ
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("ACCES REFUSE");
    lcd.setCursor(0, 1);
    lcd.print("Badge inconnu");

    digitalWrite(LED_ROUGE, HIGH);
    digitalWrite(LED_VERTE, LOW);
    digitalWrite(BUZZER, HIGH);
    delay(1000);
    digitalWrite(BUZZER, LOW);
    digitalWrite(LED_ROUGE, LOW);
  }

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Badgez pour");
  lcd.setCursor(0, 1);
  lcd.print("ouvrir la porte");
}