main.c

#define NOTE_B0  31
#define NOTE_C1  33
#define NOTE_CS1 35
#define NOTE_D1  37
#define NOTE_DS1 39
#define NOTE_E1  41
#define NOTE_F1  44
#define NOTE_FS1 46
#define NOTE_G1  49
#define NOTE_GS1 52
#define NOTE_A1  55
#define NOTE_AS1 58
#define NOTE_B1  62
#define NOTE_C2  65
#define NOTE_CS2 69
#define NOTE_D2  73
#define NOTE_DS2 78
#define NOTE_E2  82
#define NOTE_F2  87
#define NOTE_FS2 93
#define NOTE_G2  98
#define NOTE_GS2 104
#define NOTE_A2  110
#define NOTE_AS2 117
#define NOTE_B2  123
#define NOTE_C3  131
#define NOTE_CS3 139
#define NOTE_D3  147
#define NOTE_DS3 156
#define NOTE_E3  165
#define NOTE_F3  175
#define NOTE_FS3 185
#define NOTE_G3  196
#define NOTE_GS3 208
#define NOTE_A3  220
#define NOTE_AS3 233
#define NOTE_B3  247
#define NOTE_C4  262
#define NOTE_CS4 277
#define NOTE_D4  294
#define NOTE_DS4 311
#define NOTE_E4  330
#define NOTE_F4  349
#define NOTE_FS4 370
#define NOTE_G4  392
#define NOTE_GS4 415
#define NOTE_A4  440
#define NOTE_AS4 466
#define NOTE_B4  494
#define NOTE_C5  523
#define NOTE_CS5 554
#define NOTE_D5  587
#define NOTE_DS5 622
#define NOTE_E5  659
#define NOTE_F5  698
#define NOTE_FS5 740
#define NOTE_G5  784
#define NOTE_GS5 831
#define NOTE_A5  880
#define NOTE_AS5 932
#define NOTE_B5  988
#define NOTE_C6  1047
#define NOTE_CS6 1109
#define NOTE_D6  1175
#define NOTE_DS6 1245
#define NOTE_E6  1319
#define NOTE_F6  1397
#define NOTE_FS6 1480
#define NOTE_G6  1568
#define NOTE_GS6 1661
#define NOTE_A6  1760
#define NOTE_AS6 1865
#define NOTE_B6  1976
#define NOTE_C7  2093
#define NOTE_CS7 2217
#define NOTE_D7  2349
#define NOTE_DS7 2489
#define NOTE_E7  2637
#define NOTE_F7  2794
#define NOTE_FS7 2960
#define NOTE_G7  3136
#define NOTE_GS7 3322
#define NOTE_A7  3520
#define NOTE_AS7 3729
#define NOTE_B7  3951
#define NOTE_C8  4186
#define NOTE_CS8 4435
#define NOTE_D8  4699
#define NOTE_DS8 4978
 
#define melodyPin 8
 
#include<SoftwareSerial.h>
#include<Servo.h>
 
// Super Mario Melody
 int melody[] = {
    NOTE_E7, NOTE_E7, 0, NOTE_E7,
    0, NOTE_C7, NOTE_E7, 0,
    NOTE_G7, 0, 0,  0,
    NOTE_G6, 0, 0, 0,
};
 
int tempo[] = {
    12, 12, 12, 12,
    12, 12, 12, 12,
    12, 12, 12, 12,
    12, 12, 12, 12,
};
 
int song = 0;

// Bluetooth Software Serial Definition
SoftwareSerial bt(2,3);
 
// Control Pins definition
int g_LED = 12;
int r_LED = 13;
int buzzer = 8;
int IR = 4;
int gate_pin = 9;
 
// Create servo object
Servo gate;

// Initialize variables
int currentState = 0;
int angle = 0;
 
void setup() {
    pinMode(g_LED, OUTPUT);
    pinMode(r_LED, OUTPUT);
    pinMode(IR, INPUT);
    pinMode(buzzer, OUTPUT);
    
    gate.attach(gate_pin);
    
    bt.begin(9600);
    Serial.begin(9600);  
    Serial.println("Bluetooth Device 1 Paired");
    bt.println("Bluetooth Device 2 Paired");
}
 
void loop() {
    currentState = digitalRead(IR);
    digitalWrite(g_LED, LOW);
    digitalWrite(r_LED, HIGH);
    
    if (currentState == 0) {
        bt.print("Pet Detected!\n");
        sing(1);
        delay(100);
        gate.write(0);
        
        digitalWrite(g_LED, HIGH);
        digitalWrite(r_LED, LOW);
        
        bt.print("Gate Opened!\n");
        
        delay(2000);
        gate.write(90);
    }
}

// Mario Tune Generator
void sing(int s) {
    song = s;
    if (song == 1) {
        int size = sizeof(melody) / sizeof(int);
        for (int thisNote = 0; thisNote < size; thisNote++) {
            int noteDuration = 1000 / tempo[thisNote];
            buzz(melodyPin, melody[thisNote], noteDuration);int pauseBetweenNotes = noteDuration * 1.30;
            delay(pauseBetweenNotes);
            buzz(melodyPin, 0, noteDuration);
        }
    }
}

void buzz(int targetPin, long frequency, long length) {
    long delayValue = 1000000 / frequency / 2;
    long numCycles = frequency * length / 1000;
    for (long i = 0; i < numCycles; i++) { 
        digitalWrite(targetPin, HIGH); 
        delayMicroseconds(delayValue); 
        digitalWrite(targetPin, LOW); 
        delayMicroseconds(delayValue); 
    }
}