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

LiquidCrystal_I2C mylcd(0x27,16,2);
volatile int tem;
volatile int hum;
DHT dht2(2, 22);

void setup(){
  mylcd.init();
  mylcd.backlight();
  tem = 0;
  hum = 0;
   dht2.begin();
  pinMode(8, INPUT);
  pinMode(7, INPUT);
}

void loop(){
  tem = dht2.readTemperature();
  hum = dht2.readHumidity();
  mylcd.clear();
  mylcd.setCursor(0, 0);
  mylcd.print(String("TEM:") + String(tem) + String(char(0xdf)) + String("C"));
  mylcd.setCursor(0, 1);
  mylcd.print(String("HUM:") + String(hum) + String("%"));
  delay(200);
  if (digitalRead(8)) {
    mylcd.clear();
    mylcd.setCursor(0, 0);
    mylcd.print(String("F:") + String(tem * 1.8 + 32) + String(char(0xdf)) + String("F"));
    mylcd.setCursor(0, 1);
    mylcd.print(String("HUM:") + String(hum) + String("%"));
    delay(3000);

  }
  if (digitalRead(7)) {
    mylcd.clear();
    mylcd.setCursor(0, 0);
    mylcd.print(String("K:") + String(tem + 273.15) + String("K"));
    mylcd.setCursor(0, 1);
    mylcd.print(String("HUM:") + String(hum) + String("%"));
    delay(3000);

  }

}