resto-device

Embedded project for resto card reader

Wiring

sequenceDiagram
BUZZER ->> NUCLEO: GND...............GND
BUZZER ->> NUCLEO: I/O...............D0
BUZZER ->> NUCLEO: VCC...............5v
NUCLEO ->> MFRC522: D13...............SCK
NUCLEO ->> MFRC522: D11...............MOSI
NUCLEO ->> MFRC522: D12...............MISO
NUCLEO ->> MFRC522: D1................IRQ
NUCLEO ->> MFRC522: GND...............GND
NUCLEO ->> MFRC522: D5................RST
NUCLEO ->> MFRC522: 3v3...............3.3v

Loading

Final application vision

// Clean code

#include <Arduino.h>

#include "Log.h"
#include "Led.h"
#include "Buzzer.h"
#include "CardReader.h"

#define MFRC522_RST_PIN          (5)
#define MFRC522_SPI_SS_PIN       (10)
#define MFRC522_IRQ_PIN          (1)
#define BUZZER_PIN               (0)
#define BUZZER_BEEP_DURATION_MS  (1000)
#define GREEN_LED_ON_DURATION_MS (1000)

static void onCardDetected(Card card);

static const char *TAG = "MAIN";

static CardReader cardReader(MFRC522_SPI_SS_PIN, MFRC522_RST_PIN, MFRC522_IRQ_PIN);
static Buzzer buzzer(BUZZER_PIN);
static Led greenLED(LED_GREEN);
static Log logger(&Serial);

void setup() {
  logger.i(TAG, "App started...");

  cardReader.registerCallback(onCardDetected);
  cardReader.run();
}

void loop() {}

static void onCardDetected(Card card) {
  logger.i(TAG, "UID: " + card.getUID());
  greenLED.asyncOn(GREEN_LED_ON_DURATION_MS);
  buzzer.asyncOn(BUZZER_BEEP_DURATION_MS);
}