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

// LCD setup: (RS, EN, D4, D5, D6, D7)
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

// DHT22 sensor setup
#define DHTPIN 7
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  dht.begin();
  
  lcd.begin(16, 2);  // initialize LCD
  lcd.print("Temp Logger");
  delay(2000);
  lcd.clear();
}

void loop() {
  float temp = dht.readTemperature();
  float hum = dht.readHumidity();

  if (isnan(temp) || isnan(hum)) {
    Serial.println("Sensor Error!");
    lcd.setCursor(0,0);
    lcd.print("Sensor Error!   ");
    delay(2000);
    return;
  }

  // Serial output
  Serial.print("Temp: ");
  Serial.print(temp);
  Serial.print(" °C, Hum: ");
  Serial.print(hum);
  Serial.println(" %");

  // LCD output
  lcd.setCursor(0,0);
  lcd.print("Temp: ");
  lcd.print(temp);
  lcd.print((char)223); // Degree symbol
  lcd.print("C   ");

  lcd.setCursor(0,1);
  lcd.print("Hum: ");
  lcd.print(hum);
  lcd.print("%   ");

  delay(2000);
}