#include "DHT.h"
#include <LiquidCrystal_I2C.h>
#define DHTPIN 7
#define DHTTYPE DHT22
int led=2;

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27,16,2);

void setup() {
  pinMode(led, INPUT);
  Serial.begin(9600);
  dht.begin(); 
  lcd.init();
}

void loop() {
  
  float t = dht.readTemperature();
    Serial.print("\n"); 
    Serial.print("Temperature: ");
    Serial.print(t);
    Serial.print("°C");
    Serial.print("\n");
    delay(2000);
    if(t>=30.00)
    {
      digitalWrite(led, LOW);
      tone(8,990,1000);
      lcd.setCursor(0,0);
      lcd.backlight();
      lcd.print("Threshold limit");
      lcd.setCursor(0,1);
      lcd.print("exceed");
     
    }
    else
    {
      lcd.clear();
      digitalWrite(led, HIGH);
      lcd.setCursor(0,0);
       lcd.backlight();
      lcd.print("Safe");
    }
  }