#include 
#include 

#define RELAY_PIN PB0
#define RELAY_DELAY 1000

void relayInit() {
    // Set relay pin as output
    DDRB |= (1 << RELAY_PIN);
    // Start with relay OFF
    PORTB &= ~(1 << RELAY_PIN);
}

void relayOn() {
    PORTB |= (1 << RELAY_PIN);
}

void relayOff() {
    PORTB &= ~(1 << RELAY_PIN);
}

void relayToggle() {
    PORTB ^= (1 << RELAY_PIN);
}

int main(void) {
    relayInit();
    
    while(1) {
        // Turn relay ON
        relayOn();
        _delay_ms(RELAY_DELAY);
        
        // Turn relay OFF
        relayOff();
        _delay_ms(RELAY_DELAY);
        
        // Toggle relay
        relayToggle();
        _delay_ms(RELAY_DELAY);
        relayToggle();
        _delay_ms(RELAY_DELAY);
    }
    
    return 0;
}
                        

#include 
#include 

// Relay pins definition
#define LIGHT_PIN PB0
#define FAN_PIN PB1
#define PUMP_PIN PB2
#define HEATER_PIN PB3

// Sensor pins
#define LDR_PIN PC0
#define TEMP_PIN PC1
#define MOTION_PIN PC2

void initSystem() {
    // Set relay pins as output
    DDRB |= (1 << LIGHT_PIN) | (1 << FAN_PIN) | (1 << PUMP_PIN) | (1 << HEATER_PIN);
    
    // Set sensor pins as input
    DDRC &= ~((1 << LDR_PIN) | (1 << TEMP_PIN) | (1 << MOTION_PIN));
}

void autoLightControl() {
    // Read LDR sensor
    if (PINC & (1 << LDR_PIN)) {
        // Dark condition - turn on light
        PORTB |= (1 << LIGHT_PIN);
    } else {
        // Bright condition - turn off light
        PORTB &= ~(1 << LIGHT_PIN);
    }
}

void autoTemperatureControl() {
    // Read temperature sensor (simplified)
    if (PINC & (1 << TEMP_PIN)) {
        // Hot - turn on fan
        PORTB |= (1 << FAN_PIN);
        PORTB &= ~(1 << HEATER_PIN);
    } else {
        // Cold - turn on heater
        PORTB &= ~(1 << FAN_PIN);
        PORTB |= (1 << HEATER_PIN);
    }
}

void securityMode() {
    // If motion detected, turn on all lights
    if (PINC & (1 << MOTION_PIN)) {
        PORTB |= (1 << LIGHT_PIN);
        _delay_ms(30000); // Stay on for 30 seconds
        PORTB &= ~(1 << LIGHT_PIN);
    }
}

int main(void) {
    initSystem();
    
    while(1) {
        autoLightControl();
        autoTemperatureControl();
        securityMode();
        
        _delay_ms(1000); // Check every second
    }
    
    return 0;
}