#include <Wire.h>
#include <LiquidCrystal_I2C.h>

// LCD Configuration
LiquidCrystal_I2C lcd(0x27, 16, 2);  // Set I2C address to 0x27 for 16x2 LCD

// Switch Pins
const int SW1 = 14;
const int SW2 = 15;
const int SW3 = 16;

void setup() {
  // Initialize Serial Monitor
  Serial.begin(115200);
  
  // Initialize switches as inputs with pull-up resistors
  pinMode(SW1, INPUT_PULLUP);
  pinMode(SW2, INPUT_PULLUP);
  pinMode(SW3, INPUT_PULLUP);
  
  // Initialize LCD
  Wire.begin();  // Initialize I2C
  lcd.init();    // Initialize the LCD
  lcd.backlight();  // Turn on backlight
  
  // Display initial message
  lcd.setCursor(0, 0);
  lcd.print("System Ready");
  lcd.setCursor(0, 1);
  lcd.print("Press a button");
  
  Serial.println("System initialized. Ready for button input...");
}

void loop() {
  // Check Switch 1
  if (digitalRead(SW1) == LOW) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Button 1 active");
    lcd.setCursor(0, 1);
    lcd.print("Sensor 1 activated");
    
    Serial.println("Button 1 pressed - Sensor 1 activated");
    delay(300);  // Debounce delay
    while(digitalRead(SW1) == LOW);  // Wait for button release
  }
  
  // Check Switch 2
  if (digitalRead(SW2) == LOW) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Button 2 active");
    lcd.setCursor(0, 1);
    lcd.print("Sensor 2 activated");
    
    Serial.println("Button 2 pressed - Sensor 2 activated");
    delay(300);  // Debounce delay
    while(digitalRead(SW2) == LOW);  // Wait for button release
  }
  
  // Check Switch 3
  if (digitalRead(SW3) == LOW) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Button 3 active");
    lcd.setCursor(0, 1);
    lcd.print("Sensor 3 activated");
    
    Serial.println("Button 3 pressed - Sensor 3 activated");
    delay(300);  // Debounce delay
    while(digitalRead(SW3) == LOW);  // Wait for button release
  }
}