//EEE3453 Computer Programming for Microcontroller 
//End-of-Module Assessment – Mini Project Stage 2
// Intelligent environmental protection temperature and humidity sensor system
// Include necessary libraries for the project
#include <Wire.h>              // Required for I2C communication
#include <LiquidCrystal_I2C.h> // For the LCD screen over I2C
#include "DHTesp.h"            // For the DHT sensor
#include <DHT.h>               // For the DHT sensor
#include "RTClib.h"
#include <WiFi.h>            // For the Real Time Clock

// Initialize the LCD displays with their respective I2C addresses and sizes
LiquidCrystal_I2C lcd(0x27, 20, 4);
LiquidCrystal_I2C lcd2(0x3F, 20, 4);

// Initialize DHT22 sensor
DHT dht22(17, DHT22);
DHTesp dhtSensor;

// Initialize the RTC (Real Time Clock)
RTC_DS1307 rtc;

// Define pin numbers for various components
int PURPLE = 21;
int YELLOW = 20;
int CYAN = 19;
int Red_alarm = 13;
int mon = 15;
int buzzer = 5;
int relay = 37;
int GREEN1 = 9;
int ORANGE1 = 8;
int YELLOW1 = 7;
int BLUE1 = 6;

const char* ssid="Wokwi-GUEST";
const char* password="Wokwi-GUEST";

// Network Time Protocol (NTP) server information
#define NTP_SERVER "pool.ntp.org"
#define UTC_OFFSET 0
#define UTC_OFFSET_DST 0

// Function to display a spinner animation on the LCD
void spinner() {
  static int8_t counter = 0;
  const char* glyphs = "\xa1\xa5\xdb";
  lcd.setCursor(15, 1);
  lcd.print(glyphs[counter++]);
  if (counter == strlen(glyphs)) {
    counter = 0;
  }
}

// Function to print local time on the LCD
void printLocalTime() {
  struct tm timeinfo;
  if (!getLocalTime(&timeinfo)) {
    lcd.setCursor(0, 1);
    lcd.println("Connection Err");
    return;
  }

  lcd.setCursor(8, 0);
  lcd.println(&timeinfo, "%H:%M:%S");

  lcd.setCursor(0, 1);
  lcd.println(&timeinfo, "%d/%m/%Y %Z");
}

// Setup function to initialize components
void setup() {
  Serial.begin(115200);
  Serial.println("Environmental conditions in suburban areas Construct application system-detection end: start");
  dht22.begin(); // initialization DHT
  dhtSensor.setup(17, DHTesp::DHT22);
  Wire.begin(16, 15);
  lcd.init();
  lcd2.init();
  lcd.backlight();
  lcd2.backlight();
  lcd.println("Power On            Connecting to wifi");
  delay(500);
  // Setting pin modes for all the digital pins
  pinMode(PURPLE, OUTPUT);
  pinMode(YELLOW, OUTPUT);
  pinMode(CYAN, OUTPUT);
  pinMode(Red_alarm, OUTPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(GREEN1, OUTPUT);
  pinMode(ORANGE1, OUTPUT);
  pinMode(YELLOW1, OUTPUT);
  pinMode(BLUE1, OUTPUT);
  pinMode(relay, OUTPUT);

  // Checking and initializing the RTC
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }

  if (!rtc.isrunning()) {
    Serial.println("RTC is NOT running, let's set the time!");
    // The following lines would set the RTC to the date & time this sketch was compiled
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }

  WiFi.begin("Wokwi-GUEST", "", 6);

while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.println("Connecting to WiFi..");
}

Serial.println("Connected to WiFi network!");
}

// Main program loop
void loop() {
  // Get current time from RTC
  DateTime time = rtc.now();

  // Print different time formats to the Serial Monitor
  Serial.println(String("FULL:\t") + time.timestamp(DateTime::TIMESTAMP_FULL));
  Serial.println(String("DATE:\t") + time.timestamp(DateTime::TIMESTAMP_DATE));
  Serial.println(String("TIME:\t") + time.timestamp(DateTime::TIMESTAMP_TIME));

  // Re-initialize the LCD and set its backlight
  lcd.init();
  lcd.backlight();
  
  // Display the date and time on the LCD
  lcd.setCursor(1, 2);
  lcd.print(time.timestamp(DateTime::TIMESTAMP_DATE));
  lcd.setCursor(1, 3);
  lcd.print(time.timestamp(DateTime::TIMESTAMP_TIME));
  
  // Delay for half a second before continuing
  delay(500);

  // Get temperature and humidity readings from the DHT sensor
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  float h = dht22.readHumidity();    // Read humidity
  float t = dht22.readTemperature(); // Read temperature

  // Print temperature and humidity
  Serial.print("Temperature: " + String(data.temperature, 2) + "'C");
  Serial.print(" | ");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");
  delay(1000);

// Check if the temperature is greater than 40 degrees Celsius
if (data.temperature>40){
    // Print a high temperature warning to the serial monitor
    Serial.println("High temperature warning!");
    Serial.println("Fire Alarm/Air Condition turn on");
    
    // Set the cursor to the beginning of the first line of the LCD
    lcd.setCursor(0, 0);
    // Display "Hot!" and the temperature on the LCD
    lcd.print("Hot! ");
    lcd.print("Tem:"+String(t)+ "'C");
    
    // Move the cursor to the second line of the LCD
    lcd.setCursor(5,1);
    // Display the humidity on the LCD
    lcd.print("Hum:"+String(h) + "%");
    
    // Turn on the PURPLE LED
    digitalWrite(PURPLE, HIGH);
    // Short delay before activating the alarm
    delay(50);
    
    // Activate the red alarm, then turn it off after a short delay
    digitalWrite(Red_alarm, HIGH);
    delay(1000);
    digitalWrite(Red_alarm, LOW);
    delay(50);
    
    // Activate the BLUE1 LED and turn off the YELLOW and CYAN LEDs
    digitalWrite(BLUE1, HIGH);
    digitalWrite(YELLOW, LOW);
    digitalWrite(CYAN, LOW);
    
    // Turn on a relay, possibly to activate an air conditioner
    digitalWrite(relay, HIGH);
    
    // Sound a buzzer at 2000 Hz for a short tone
    tone(buzzer, 2000);
    delay(100);
    noTone(buzzer);
    delay(20);
}
// Short delay before the next reading
delay(500);

// Check if the humidity is greater than 90%
if (data.humidity>90){
    // Print a high humidity warning to the serial monitor
    Serial.println("Wet! Warning air is wet");
    Serial.println("Raining day, Dehumidification system on");
    
    // Similar LCD and LED operations as above for a wet warning
    lcd.setCursor(0, 0);
    lcd.print("WET! ");
    lcd.print("Tem:"+String(t)+ "'C");
    lcd.setCursor(5,1);
    lcd.print("Hum:"+String(h) + "%");
    digitalWrite(PURPLE, HIGH);
    delay(50);
    digitalWrite(PURPLE, HIGH);
    delay(10);
    digitalWrite(Red_alarm, HIGH);
    delay(40);
    digitalWrite(Red_alarm, LOW);
    delay(30);
    digitalWrite(GREEN1, HIGH);
    digitalWrite(CYAN, LOW);
    
    // Turn off the relay, possibly to deactivate a humidifier
    digitalWrite(relay, LOW);
    
    // Sound a lower frequency buzzer at 1000 Hz
    tone(buzzer, 1000);
    delay(100);
    noTone(buzzer);
    delay(30);
}
// Short delay before the next reading
delay(500);

// Check if the temperature is less than 20 degrees Celsius and humidity is less than 30%
if (data.temperature<20 && data.humidity<30){
    // Print a message indicating good conditions for outdoor activities
    Serial.println("Good! Outgoing");
    Serial.println("Picnic or sport day");
    
    // Display a positive message on the LCD
    lcd.setCursor(0, 0);
    lcd.print("Good! ");
    lcd.print("Tem:"+String(t)+ "'C");
    lcd.setCursor(5,1);
    lcd.print("Hum:"+String(h) + "%");
    
    // Briefly flash the YELLOW LED
    digitalWrite(YELLOW, HIGH);
    delay(10);
    digitalWrite(YELLOW, LOW);
    
    // Turn off CYAN LED and activate the relay
    digitalWrite(CYAN, LOW);
    digitalWrite(relay, HIGH);
    
    // Sound the buzzer at 1000 Hz for a short tone
    tone(buzzer, 1000);
    delay(100);
    noTone(buzzer);
    delay(30);
}
// Short delay before the next reading
delay(500);

// Check if the humidity is less than 20%
if (data.humidity<20){
    // Print a warning about dry and potentially dangerous conditions
    Serial.println("Cold!!! Warning weather is dry fire crisis danger");
    Serial.println("Fire Alarm ON Air & Condition turn OFF");
    
    // Display a dry weather warning on the LCD
    lcd.setCursor(0, 0);
    lcd.print("Dry! ");
    lcd.print("Tem:"+String(t)+ "'C");
    lcd.setCursor(5,1);
    lcd.print("Hum:"+String(h) + "%");
    
    // Activate the YELLOW LED and sound the alarm briefly
    digitalWrite(YELLOW, HIGH);
    delay(10);
    digitalWrite(Red_alarm, HIGH);
    delay(30);
    digitalWrite(Red_alarm, LOW);
    delay(30);
    digitalWrite(YELLOW, LOW);
    
    // Turn on the GREEN1 LED
    digitalWrite(GREEN1, HIGH);
    
    // Turn off the relay, possibly to deactivate heating elements or humidifiers
    digitalWrite(relay, LOW);
    
    // Sound a very short buzzer tone at 100 Hz
    tone(buzzer, 100);
    delay(50);
    noTone(buzzer);
    delay(10);
}

// Short delay before the next reading
delay(500);

// Check if the temperature is greater than 10 degrees Celsius
if (data.temperature>10){
    // Print a message indicating cool weather but no immediate action required
    Serial.println("Cool!!! Warning weather is dry Low temperature");
    Serial.println("Cool. Turn off all the Machine");
    
    // Display information about the cool temperature on the LCD
    lcd.setCursor(0, 0);
    lcd.print("Cool");
    lcd.print("Tem:"+String(t)+ "'C");
    lcd.setCursor(5,1);
    lcd.print("Hum:"+String(h) + "%");
    
    // Turn off the PURPLE LED
    digitalWrite(PURPLE, LOW);
    
    // Sound the alarm briefly and then turn it off
    digitalWrite(Red_alarm, HIGH);
    delay(30);
    digitalWrite(Red_alarm, LOW);
    delay(30);
    
    // Turn on the ORANGE1 and CYAN LEDs
    digitalWrite(ORANGE1, HIGH);
    digitalWrite(CYAN, HIGH);
    
    // Turn off the relay
    digitalWrite(relay, LOW);
    
    // Sound a short buzzer tone at 100 Hz
    tone(buzzer, 100);
    delay(50);
    noTone(buzzer);
    delay(10);
}

// Short delay before the next reading
delay(500);

// Check if the temperature is less than -10 degrees Celsius
if (data.temperature<-10){
    // Print a message indicating cold but normal weather
    Serial.println("Cold Today");
    
    // Display a normal weather message on the LCD
    lcd.setCursor(0, 0);
    lcd.print("Normal");
    lcd.print("Tem:"+String(t)+"'C");
    lcd.setCursor(5,1);
    lcd.print("Hum:"+String(h)+ "%");
    
    // Ensure the PURPLE and YELLOW LEDs are off and CYAN is on
    digitalWrite(PURPLE, LOW);
    digitalWrite(YELLOW, LOW);
    digitalWrite(CYAN, HIGH);
    
    // Turn off the relay
    digitalWrite(relay, LOW);
    
    // Sound a long buzzer tone at 100 Hz
    tone(buzzer, 100);
    delay(2000);
    noTone(buzzer);
    delay(500);
}

// Short delay before the next reading
delay(500);

// Check if the temperature is less than -40 degrees Celsius
if (data.temperature<-40){
    // Print a warning about extremely cold conditions
    Serial.println("Freeze!!! Warning Snow and ice");
    
    // Display a freezing weather warning on the LCD
    lcd.setCursor(0, 0);
    lcd.print("Ice!");
    lcd.print("Tem:"+String(t)+"'C");
    lcd.setCursor(5,1);
    lcd.print("Hum:"+String(h)+ "%");
    
    // Ensure the PURPLE and YELLOW LEDs are off and CYAN is on
    digitalWrite(PURPLE, LOW);
    digitalWrite(YELLOW, LOW);  
    digitalWrite(CYAN, HIGH);
    
    // Turn off the relay
    digitalWrite(relay, LOW);
    
    // Sound a buzzer tone at 600 Hz for a very short duration
    tone(buzzer, 600);
    delay(50);
    noTone(buzzer);
    delay(10);
} else {
    // If none of the above conditions are met, print a normal weather message
    Serial.println("Good day Normal");
}

// Short delay before the next reading
delay(500);
}