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

#define dhtpin 4
#define DHTTYPE DHT22
#define btn 2
#define ledpin 7
int val = 0;
DHT dht(dhtpin, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  pinMode(ledpin, OUTPUT);
  pinMode(btn, INPUT);
  Serial.begin(115200);
  dht.begin();
  lcd.init();
  lcd.backlight();
}

void loop() {
  float t = dht.readTemperature();
  val = digitalRead(btn);

  if (val == HIGH) {
    digitalWrite(ledpin, HIGH);
    Serial.println("LED is ON");
  }
  else if (val == LOW) {
    digitalWrite(ledpin, LOW);
    Serial.println("LED is OFF");
  }

  lcd.print("Temp: ");
  lcd.print(t);

  delay(300);
  lcd.clear();
  delay(100);
}