TactiFind

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

// Define pins (change these as necessary for your setup)
#define SS_PIN    10    // SDA (SS) pin
#define RST_PIN   9     // RST pin
#define BUZZER_PIN 8    // Pin connected to buzzer or speaker

MFRC522 mfrc522(SS_PIN, RST_PIN);  // Create MFRC522 instance

String lastLocation = "Unknown";  // Variable to store last known location

void setup() {
    Serial.begin(115200);   // Initialize serial communications
    SPI.begin();            // Init SPI bus
    mfrc522.PCD_Init();     // Init MFRC522
    
    pinMode(BUZZER_PIN, OUTPUT); // Set buzzer pin as output
    
    Serial.println("RFID Walking Stick Localization System Initialized.");
}

void loop() {
    // Check if a new card is present
    if (mfrc522.PICC_IsNewCardPresent() && mfrc522.PICC_ReadCardSerial()) {
        String currentID = "";
        for (byte i = 0; i < mfrc522.uid.size; i++) {
            currentID += String(mfrc522.uid.uidByte[i], HEX);  // Create a unique ID from RFID tag
        }

        // Convert to uppercase to ensure consistent comparison
        currentID.toUpperCase();

        // Detect the location based on the RFID tag's ID
        if (currentID == "FD60F949") {  // Replace with the unique ID of the tag in the living room
            lastLocation = "Living Room";
            provideFeedback("Living Room");
        }
        else if (currentID == "322F3621") {  // Replace with the unique ID of the tag in the workplace
            lastLocation = "Workplace";
            provideFeedback("Workplace");
        }
        else {
            lastLocation = "Unknown Location";
            provideFeedback("Unknown Location");
        }

        mfrc522.PICC_HaltA();  // Halt PICC
        mfrc522.PCD_StopCrypto1();  // Stop encryption on PCD
    }
}

void provideFeedback(String location) {
    Serial.print("Walking Stick Last Detected at: ");
    Serial.println(location);

    if (location == "Living Room") {
        // Beep to indicate the location
        tone(BUZZER_PIN, 1000); // Turn on buzzer with 1 kHz tone
        delay(500);             // Delay for 500 ms
        noTone(BUZZER_PIN);     // Turn off buzzer
        delay(1000);            // Delay for 1 second
        tone(BUZZER_PIN, 1000); // Turn on buzzer with 1 kHz tone
        delay(500);             // Delay for 500 ms
        noTone(BUZZER_PIN);     // Turn off buzzer
    }
    else if (location == "Workplace") {
        // Different beep to indicate the location
        tone(BUZZER_PIN, 1000); // Turn on buzzer with 1 kHz tone
        delay(500);             // Delay for 500 ms
        noTone(BUZZER_PIN);     // Turn off buzzer
        delay(1000);            // Delay for 1 second
        tone(BUZZER_PIN, 1000); // Turn on buzzer with 1 kHz tone
        delay(500);             // Delay for 500 ms
        noTone(BUZZER_PIN);     // Turn off buzzer
    }
    else {
        // Beep to indicate unknown location
        tone(BUZZER_PIN, 1000); // Turn on buzzer with 1 kHz tone
        delay(500);             // Delay for 500 ms
        noTone(BUZZER_PIN);     // Turn off buzzer
    }
}