Unit 29: Open for business

Code for Sketch One:


#include 
#include 
#include   // Include TinyDisplay library

#define SS_PIN 10        // Pin for RFID SDA
#define RST_PIN 9        // Pin for RFID RST
#define LED_PIN 6        // Pin for LED (updated to pin 6)
#define CLK_PIN 2        // Pin for display clock
#define DIO_PIN 4        // Pin for display data

MFRC522 rfid(SS_PIN, RST_PIN); // Create MFRC522 instance
TM1637TinyDisplay display(CLK_PIN, DIO_PIN); // Create display instance

void setup() {
  SPI.begin();                 // Initialize SPI bus
  rfid.PCD_Init();             // Initialize RFID reader
  pinMode(LED_PIN, OUTPUT);    // Set LED as output
  digitalWrite(LED_PIN, LOW);  // Start with LED off

  display.begin();             // Initialize the display
  display.setBrightness(7);    // Set brightness level
  display.showString("----");  // Display dashes at startup
}

void loop() {
  // Look for new RFID cards
  if (rfid.PICC_IsNewCardPresent() && rfid.PICC_ReadCardSerial()) {
    
    // RFID detected - show "oPEn" and light the LED
    display.showString("oPEn");      // Show "oPEn" on display
    digitalWrite(LED_PIN, HIGH);     // Turn on LED (Pin 6)
    delay(3000);                     // Wait for 3 seconds
    
    // Reset the display and turn off LED
    display.showString("----");      // Reset display
    digitalWrite(LED_PIN, LOW);      // Turn off LED (Pin 6)
    
    // Halt the PICC to prevent multiple readings of the same card
    rfid.PICC_HaltA();
    delay(1000);  // Add delay to avoid multiple detections
  }
}
Unit 29: Open for business

Code for Sketch One:

Notes:
