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

// Pin definitions for the ESP32
#define DHTPIN 15       // Pin connected to the DHT11 sensor
#define DHTTYPE DHT11   // DHT11 sensor type

// Pin definitions for the LCD (RS, E, D4, D5, D6, D7)
LiquidCrystal lcd(15, 5, 12, 13, 14, 16);

// Initialize DHT sensor
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  // Initialize serial communication
  Serial.begin(115200);

  // Initialize the LCD (16 columns, 2 rows)
  lcd.begin(16, 2);

  // Initialize the DHT11 sensor
  dht.begin();
  
  // Display initial message on LCD
  lcd.print("Reading sensor");
}

void loop() {
  // Read humidity and temperature from DHT11
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  // Check if any reading failed
  if (isnan(humidity) || isnan(temperature)) {
    lcd.clear();
    lcd.print("Error reading");
    return;
  }

  // Display temperature and humidity on the LCD
  lcd.clear();
  lcd.setCursor(0, 0); // Set cursor to first row
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print("C");

  lcd.setCursor(0, 1); // Set cursor to second row
  lcd.print("Humidity: ");
  lcd.print(humidity);
  lcd.print("%");

  // Wait 2 seconds before the next update
  delay(2000);
}