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

#define START_BTN 3
#define RELAY1 6
#define RELAY2 7

LiquidCrystal_I2C lcd(0x27, 16, 2); // Adjust address if needed

void setup() {
  pinMode(START_BTN, INPUT_PULLUP);
  pinMode(RELAY1, OUTPUT);
  pinMode(RELAY2, OUTPUT);

  digitalWrite(RELAY1, LOW);
  digitalWrite(RELAY2, LOW);

  lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Press Start");
}

void loop() {
  if (digitalRead(START_BTN) == LOW) { // Button pressed
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Relay: 1");

    // Wait 5 seconds before Relay 1
    for (int i = 5; i > 0; i--) {
      lcd.setCursor(0, 1);
      lcd.print("Start in: ");
      lcd.print(i);
      lcd.print(" sec ");
      delay(1000);
    }

    // Relay 1 ON for 0.5 sec
    digitalWrite(RELAY1, HIGH);
    delay(500);
    digitalWrite(RELAY1, LOW);

    // Countdown to Relay 2 (25 seconds)
    for (int i = 25; i > 0; i--) {
      lcd.setCursor(0, 0);
      lcd.print("Relay: 2     ");
      lcd.setCursor(0, 1);
      lcd.print("Next in: ");
      lcd.print(i);
      lcd.print(" sec ");
      delay(1000);
    }

    // Relay 2 ON for 5 seconds
    digitalWrite(RELAY2, HIGH);
    delay(5000);
    digitalWrite(RELAY2, LOW);

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Sequence Done");
    delay(3000);
    lcd.clear();
    lcd.print("Press Start");
  }
}