/*
ESP32 pin     Komponen
25            sensor gas(MQ-2)
26            sensor api
14            buzzer
12            triger HC-SR04 samping
13            echo HC-SR04 samping
16            triger HC-SR04 atas
17            echo HC-SR04 atas
21            SDA LCD
22            SCL LCD
*/

/////////////////////// Inisialisasi Telegram dan sensor gas & api //////////////////////
#include <WiFiClientSecure.h>
#include <UniversalTelegramBot.h>
#include <ArduinoJson.h>

// Wifi network station credentials
#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""
// Telegram BOT Token (Get from Botfather)
#define BOT_TOKEN "7175374685:AAElg8MvtzWWZ_J2mcTtYovVt3WwsQkLlA4"
#define CHAT_ID "1838205197"

WiFiClientSecure secured_client;
UniversalTelegramBot bot(BOT_TOKEN, secured_client);

// Pin sensor dan led_api
const int gasSensorPin = 25; 
const int flameSensorPin = 26; 
const int buzzer = 14; // GPIO14 untuk buzer

//////////// Inisialisasi HCSR samping dan atas ///////////
const int trigPin1 = 12;    //samping
const int echoPin1 = 13;
const int trigPin2 = 16;    //atas
const int echoPin2 = 17;

//define sound speed in cm/uS
#define SOUND_SPEED 0.034
long duration1;
float distanceCm1;
long duration2;
float distanceCm2;

//////// Setup LCD I2C /////////
#include <LiquidCrystal_I2C.h>
// seting jumlah kolom dan baris LCD
int lcdColumns = 16;
int lcdRows = 2;
// Setting address LCD
LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows);

///// Setup Koneksi WiFi & Telegram /////
void setuptg(){
  lcd.setCursor(0, 0);
  lcd.print("Menghubungkan   ");
  lcd.setCursor(0, 1);
  lcd.print("Wifi            ");
  Serial.print("Connecting to Wifi SSID ");
  Serial.print(WIFI_SSID);
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  secured_client.setCACert(TELEGRAM_CERTIFICATE_ROOT); // Add root certificate for api.telegram.org
  while (WiFi.status() != WL_CONNECTED)
  {
    Serial.print(".");
    delay(500);
  }
  Serial.print("\nWiFi connected. IP address: ");
  Serial.println(WiFi.localIP());

  lcd.setCursor(0, 0);
  lcd.print("Menghubungkan   ");
  lcd.setCursor(0, 1);
  lcd.print("Telegram        ");

  Serial.print("Retrieving time: ");
  configTime(0, 0, "pool.ntp.org"); // get UTC time via NTP
  time_t now = time(nullptr);
  while (now < 24 * 3600)
  {
    Serial.print(".");
    delay(100);
    now = time(nullptr);
  }
  Serial.println(now);

  bot.sendMessage(CHAT_ID, "Bot started up", "");
}

bool api, gas, penyusup, gas_sebelum, api_sebelum, penyusup_old = false;
//api = false; gas , penyusup , gas_sebelum , api_sebelum = false;

/////////////////////// Setup ESP32 ///////////////////////
void setup() {
  Serial.begin(115200);   // Initiate a serial communication
  pinMode(gasSensorPin, INPUT);
  pinMode(flameSensorPin, INPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(trigPin1, OUTPUT);
  pinMode(echoPin1, INPUT);
  pinMode(trigPin2, OUTPUT);
  pinMode(echoPin2, INPUT);
  lcd.init();                      
  lcd.backlight();
  setuptg();
  lcd.setCursor(0, 0);
  lcd.print("   Smart Home   ");
  lcd.setCursor(0, 1);
  lcd.print("M. Alfianhamzah");
}

/////////////////////// Program Utama RFID, Servo, dan Stepper ///////////////////////
void loop() {
  ///// Program Deteksi Gas dan Api /////
  if (digitalRead(gasSensorPin) == LOW) {
    gas = true;
    tone(buzzer, 500, 500);
    delay(10);
  } else {
    gas = false;
  }
  Serial.print('.');

  // Deteksi api
  if (digitalRead(flameSensorPin) == HIGH) {
    api = true;
    tone(buzzer, 500, 500);
    delay(10);
  } else {
    api = false;
  }

  if (gas!=gas_sebelum){
    if (gas==true){
      String message = "Peringatan: Kebocoran gas terdeteksi! ";
      bot.sendMessage(CHAT_ID, message, "");
      Serial.println(message);
    } else {
      String message = "Kebocoran gas sudah tidak terdeteksi";
      bot.sendMessage(CHAT_ID, message, "");
      Serial.println(message);
    }
    gas_sebelum = gas;
  }
  if (api!=api_sebelum){
    if (api==true){
      String message = "Peringatan: Api terdeteksi! ";
      bot.sendMessage(CHAT_ID, message, "");
      Serial.println(message);
    } else {
      String message = "Api sudah tidak terdeteksi";
      bot.sendMessage(CHAT_ID, message, "");
      Serial.println(message);
    }
    api_sebelum = api;
  }
  Serial.print('.');

  digitalWrite(trigPin1, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin1, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin1, LOW);
  duration1 = pulseIn(echoPin1, HIGH);
  distanceCm1 = duration1 * SOUND_SPEED/2;
  
  Serial.print("HC-SR04 samping (cm): ");
  Serial.println(distanceCm1);

  digitalWrite(trigPin2, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin2, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin2, LOW);
  duration2 = pulseIn(echoPin2, HIGH);
  distanceCm2 = duration2 * SOUND_SPEED/2;
  
  Serial.print("HC-SR04 atas (cm): ");
  Serial.println(distanceCm2);

  if (distanceCm1 <= 10 && distanceCm1 >= 5){      // Ganti jarak deteksi sensor ultrasonik
      penyusup = true;
  } else {
    penyusup = false;
  }
  if (distanceCm2 <= 10 && distanceCm2 >= 5){      // Ganti jarak deteksi sensor ultrasonik
      penyusup = true;
  } else {
    penyusup = false;
  }

  if (penyusup!=penyusup_old){
    if (penyusup==true){
      String message = "Peringatan: Terdeteksi Ada Penyusup! ";
      bot.sendMessage(CHAT_ID, message, "");
      Serial.println(message);
    }
    penyusup_old = penyusup;
  }
  Serial.println("###");
  delay(1000);
}