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

// Pin definitions
const int redPin = 9;
const int greenPin = 10;
const int bluePin = 11;
const int buzzerPin = 8;
const int dht1Pin = 6;
const int dht2Pin = 7;

// DHT sensor setup
#define DHTTYPE DHT22
DHT dht1(dht1Pin, DHTTYPE);
DHT dht2(dht2Pin, DHTTYPE);

// LCD setup
LiquidCrystal_I2C lcd(0x27, 20, 4);

// Variables for temperature averaging (only for DHT sensors)
float tempDHT1 = 0;
float tempDHT2 = 0;

void setup() {
  // Initialize RGB LED pins
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);

  // Initialize DHT sensors
  dht1.begin();
  dht2.begin();

  // Initialize LCD
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Temperature Monitor");

  Serial.begin(9600);
}

void loop() {
  // Update the DHT sensors
  tempDHT1 = dht1.readTemperature(true); // Request Fahrenheit
  tempDHT2 = dht2.readTemperature(true); // Request Fahrenheit

  // Check for valid DHT readings
  if (isnan(tempDHT1)) {
    Serial.println("Error reading temperature from DHT1");
    tempDHT1 = 0;
  }
  if (isnan(tempDHT2)) {
    Serial.println("Error reading temperature from DHT2");
    tempDHT2 = 0;
  }

  // Calculate the average temperature from DHT sensors
  float avgTempFahrenheit = (tempDHT1 + tempDHT2) / 2;

  // Print the temperature values (Fahrenheit)
  Serial.print("Temperature from DHT1: ");
  Serial.print(tempDHT1);
  Serial.println("°F");

  Serial.print("Temperature from DHT2: ");
  Serial.print(tempDHT2);
  Serial.println("°F");

  Serial.print("Average Temperature (DHT Sensors): ");
  Serial.print(avgTempFahrenheit);
  Serial.println("°F");

  // Display temperature on LCD
  lcd.setCursor(0, 1);
  lcd.print("DHT1: ");
  lcd.print(tempDHT1);
  lcd.print(" F");

  lcd.setCursor(0, 2);
  lcd.print("DHT2: ");
  lcd.print(tempDHT2);
  lcd.print(" F");

  lcd.setCursor(0, 3);
  lcd.print("Avg: ");
  lcd.print(avgTempFahrenheit);
  lcd.print(" F   ");

  // Temperature irregularities
  if (avgTempFahrenheit > 120) {
    Serial.println("Warning: Temperature too hot! Get somewhere cool or back inside!");
    flashLED(redPin);
    soundBuzzer();
  } else if (avgTempFahrenheit < 0) {
    Serial.println("Warning: Temperature too cold! Get back inside or somewhere warm!");
    flashLED(bluePin);
    soundBuzzer();
  } else {
    // Set RGB LED color based on average temperature
    if (avgTempFahrenheit < 50) {
      setRGBColor(0, 0, 255); // Blue for below 50°F
    } else if (avgTempFahrenheit >= 50 && avgTempFahrenheit < 60) {
      setRGBColor(255, 255, 0); // Yellow for 50-60°F
    } else if (avgTempFahrenheit >= 60 && avgTempFahrenheit < 80) {
      setRGBColor(0, 255, 0); // Green for 60-80°F
    } else if (avgTempFahrenheit >= 80 && avgTempFahrenheit < 90) {
      setRGBColor(255, 165, 0); // Orange for 80-90°F
    } else {
      setRGBColor(255, 0, 0); // Red for above 90°F
    }
  }

  delay(1000); // Wait 1 second
}

void setRGBColor(int red, int green, int blue) {
  analogWrite(redPin, red);
  analogWrite(greenPin, green);
  analogWrite(bluePin, blue);
}

void flashLED(int pin) {
  for (int i = 0; i < 5; i++) { // Flash 5 times
    digitalWrite(pin, HIGH);
    delay(500); // Half-second on
    digitalWrite(pin, LOW);
    delay(500); // Half-second off
  }
}

void soundBuzzer() {
  for (int i = 0; i < 5; i++) { // Sound buzzer 5 times
    digitalWrite(buzzerPin, HIGH);
    delay(500); // Half-second on
    digitalWrite(buzzerPin, LOW);
    delay(250); // Quarter-second off
  }
}