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

#define DHTPIN 2      // Pin where your DHT sensor is connected.
#define DHTTYPE DHT22 // Type of DHT sensor.

LiquidCrystal_I2C lcd(0x27, 16, 2);

DHT dht(DHTPIN, DHTTYPE);

int ledY = 3;
int ledO = 4;
int ledDG = 5;
int ledP = 6;
int ledR = 7;

void setup() {
 Wire.begin(); // Initialize the I2C communication for the LCD
 dht.begin();

 lcd.init();       // Initialize the LCD
 lcd.backlight(); // Turn on the backlight
 lcd.clear();
 lcd.setCursor(0, 0);
 lcd.print("Initializing...");

 pinMode(ledY, OUTPUT);
 pinMode(ledO, OUTPUT);
 pinMode(ledDG, OUTPUT);
 pinMode(ledP, OUTPUT);
 pinMode(ledR, OUTPUT);
}

void loop() {
 delay(5000); // Delay for 2 seconds to prevent rapid readings

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

 if (isnan(temperature) || isnan(humidity)) {
    Serial.println("Failed to read data from DHT sensor!");
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Sensor Error");
    return;
 }

 lcd.clear();
 lcd.setCursor(0, 0);
 lcd.print("Temp: ");
 lcd.print(temperature, 1); // Display temperature with one decimal place
 lcd.print(" ");
 lcd.write(0xDF); // Display the degree symbol
 lcd.print("C");

 lcd.setCursor(0, 1);
 lcd.print("Humidity: ");
 lcd.print(humidity, 1); // Display humidity with one decimal place
 lcd.print(" %");
 delay(5000);

 // Control LED based on temperature and humidity
 if (temperature <= 0) {
    digitalWrite(ledY, HIGH);
    delay(1000);
    digitalWrite(ledY, LOW);
 } else if (temperature <= 16) {
    digitalWrite(ledO, HIGH);
    delay(1000);
    digitalWrite(ledO, LOW);
 } else if (temperature <= 25) {
    digitalWrite(ledDG, HIGH);
    delay(1000);
    digitalWrite(ledDG, LOW);
 } else if (temperature <= 37) {
    digitalWrite(ledP, HIGH);
    delay(1000);
    digitalWrite(ledP, LOW);
 } else {
    digitalWrite(ledR, HIGH);
    delay(1000);
    digitalWrite(ledR, LOW);
 }

 delay(2000); // Adjust the delay based on your preference
}