#include <SoftwareSerial.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#include <Wire.h>
#include <RTClib.h>
#include <Relay.h>

//Bluetooth Connection
#define rxPin 11 
#define txPin 10 
SoftwareSerial bluetooth = SoftwareSerial(rxPin,txPin); //rx | tx
//SoftwareSerial bluetooth(10, 11);  // RX, TX pins on Arduino
#define RELAY_ON 0
#define RELAY_OFF 1
#define RELAY_1  4
char data = 0;


// Set the LCD address (usually 0x27 or 0x3F)
#define LCD_ADDRESS 0x27
// Set the LCD dimensions (columns x rows)
#define LCD_COLUMNS 16
#define LCD_ROWS 2
LiquidCrystal_I2C lcd(LCD_ADDRESS, LCD_COLUMNS, LCD_ROWS);



// Set the DHT pin
#define DHTPIN 2
// Uncomment one of the following based on your DHT sensor type
#define DHTTYPE DHT11   // DHT 11
//#define DHTTYPE DHT21   // DHT 21 (AM2301)
//#define DHTTYPE DHT22   // DHT 22 (AM2302)
DHT dht(DHTPIN, DHTTYPE);
//const int timeout = 10000; 
RTC_DS3231 rtc;
int Date;
//const int timeout = 10000;       //define timeout of 10 sec
//char menuOption = 0;
//long time0;
int relay = 3; // Plug the relay into Digital Pin 3
void setup() {
  Serial.begin(9600);
  lcd.println("start");
  bluetooth.begin(9600);  // Default baud rate for most HC-06 modules
  // Bluetooth Connection Setup
  // pinMode(keys,OUTPUT);
  //digitalWrite(keys,HIGH);
  pinMode(rxPin, INPUT);
  pinMode(txPin, OUTPUT);
  //----------------------------
  //LCD
  lcd.begin(LCD_COLUMNS, LCD_ROWS);
  lcd.backlight(); // Uncomment this line if your LCD has a backlight
  dht.begin();
  rtc.begin();
  if (!rtc.begin()) {
    lcd.println("Couldn't find RTC");
    //while (1);
  }
  else if (rtc.lostPower()) {
    lcd.println("RTC lost power, let's set the time!");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }
  
  
}


void loop() {
  
  // Read from Bluetooth module
  if (bluetooth.available()) {
    char receivedChar = bluetooth.read();
    bluetooth.print(receivedChar);
  }

  // Read from Serial Monitor and send to Bluetooth module
  if (bluetooth.available()) {
    char sendChar = bluetooth.read();
    bluetooth.write(sendChar);
  }
     lcd.clear(); // Clear the LCD screen
  // Print a message
  lcd.setCursor(0, 0); // Set the cursor to the first column and first row
  lcd.print("Hello");
  //delay(2000); // Wait for 2 seconds

  // Print another message
  //lcd.clear();
  lcd.setCursor(0, 1); // Set the cursor to the first column and second row
  lcd.print("Everyone!       ");
  delay(2000); // Wait for 2 seconds
  
  
   // delay(2000); // Wait for 2 seconds between readings

  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  // Check if the reading was successful
  if (!isnan(humidity) && !isnan(temperature)) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Humidity:");
    lcd.print(humidity);
    lcd.setCursor(0, 1);
    lcd.print(F("Temp: "));
    lcd.print((char)223);
    lcd.println(temperature);
    delay(5000);
  } 
  else {
    lcd.println("Failed to read from DHT sensor");}

  DateTime now = rtc.now();
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Date:");
  lcd.print(now.year(), DEC);
  lcd.print('/');
  lcd.print(now.month(), DEC);
  lcd.print('/');
  lcd.print(now.day(), DEC);
  lcd.print(" ");
  lcd.setCursor(0, 1);
  lcd.print("Time:");
  lcd.print(now.hour(), DEC);
  lcd.print(':');
  lcd.print(now.minute(), DEC);
  lcd.print(':');
  lcd.print(now.second(), DEC);
  lcd.println(" ");
  delay(5000);
  
  // PC Fan 12V - Test Code
    // The PC Fan will turn on for 2000ms and off for 4000ms (4 sec)
    PCFan.on(); // 1. turns on
    delay(2000);       // 2. waits 2000 milliseconds (2 sec).
    PCFan.off();// 3. turns off
    delay(4000);       // 4. waits 4000 milliseconds (4 sec).
  
}