//Welcome in the project Moch Rijki Supriyatna:("MRS_Iky")
//Sistem Keamanan  Rumah ESP32 Notif To the Telegram
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>

// Konfigurasi pin
#define DHTPIN 15
#define DHTTYPE DHT22
#define PIR_PIN 14
#define MQ2_PIN 34
#define BUZZER_PIN 13
#define LED_PIN 12
#define RELAY_PIN 27

// Threshold untuk deteksi gas
#define MQ2_THRESHOLD 400

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Variabel waktu
unsigned long lastReadTime = 0;
const unsigned long readInterval = 5000;

void setup() {
  Serial.begin(115200);

    // Inisialisasi pin
      pinMode(PIR_PIN, INPUT);
        pinMode(MQ2_PIN, INPUT);
          pinMode(BUZZER_PIN, OUTPUT);
            pinMode(LED_PIN, OUTPUT);
              pinMode(RELAY_PIN, OUTPUT);

                // Inisialisasi modul
                  dht.begin();
                    lcd.init();
                      lcd.backlight();

                        lcd.setCursor(0, 0);
                          lcd.print("Sistem Siaga...");
                            delay(1000);
                              lcd.clear();
                              }

                              void loop() {
                                unsigned long now = millis();

                                  // Baca sensor
                                    int pirState = digitalRead(PIR_PIN);
                                      int gasLevel = analogRead(MQ2_PIN);
                                        float suhu = dht.readTemperature();
                                          float kelembaban = dht.readHumidity();

                                            // Tampilkan suhu dan kelembaban setiap 5 detik
                                              if (now - lastReadTime > readInterval) {
                                                  lcd.clear();
                                                      lcd.setCursor(0, 0);
                                                          lcd.print("Suhu:");
                                                              lcd.print(suhu);
                                                                  lcd.print("C");
                                                                      lcd.setCursor(0, 1);
                                                                          lcd.print("Hum:");
                                                                              lcd.print(kelembaban);
                                                                                  lcd.print("%");

                                                                                      Serial.println("Update Data Lingkungan:");
                                                                                          Serial.printf("Suhu: %.1f C | Kelembaban: %.1f %% | Gas: %d\n", suhu, kelembaban, gasLevel);

                                                                                              lastReadTime = now;
                                                                                                }

                                                                                                  // Deteksi bahaya
                                                                                                    if (pirState == HIGH || gasLevel > MQ2_THRESHOLD) {
                                                                                                        lcd.clear();
                                                                                                            lcd.setCursor(0, 0);
                                                                                                                if (pirState == HIGH) {
                                                                                                                      lcd.print("Intruder Detected!");
                                                                                                                            Serial.println("Telegram: Detected Motion!");
                                                                                                                                } else {
                                                                                                                                      lcd.print("Gas Detected!");
                                                                                                                                            Serial.println("Telegram: Gas Leakage Alert!");
                                                                                                                                                }

                                                                                                                                                    // Aktifkan alarm
                                                                                                                                                        digitalWrite(BUZZER_PIN, HIGH);
                                                                                                                                                            digitalWrite(LED_PIN, HIGH);
                                                                                                                                                                digitalWrite(RELAY_PIN, HIGH);
                                                                                                                                                                    delay(2000); // Alarm aktif selama 2 detik
                                                                                                                                                                      } else {
                                                                                                                                                                          digitalWrite(BUZZER_PIN, LOW);
                                                                                                                                                                              digitalWrite(LED_PIN, LOW);
                                                                                                                                                                                  digitalWrite(RELAY_PIN, LOW);
                                                                                                                                                                                    }
                                                                                                                                                                                    }