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

uint8_t dot[] = {0x0E, 0x0A, 0x0E, 0x00, 0x00, 0x00, 0x00, 0x00};

LiquidCrystal_I2C lcd(0x27, 20, 4);  // Update address
DHT dht(32, DHT22);

void setup() {
  Serial.begin(115200);
  Serial.println("Hello Lab 3");
  dht.begin();
  lcd.init();
  // lcd.backlight();
  lcd.createChar(0, dot);  // Use slot 0
}

void loop() {
  float h = dht.readHumidity();         // Relative humidity
  float c = dht.readTemperature();      // Celsius
  float f = dht.readTemperature(true);  // Fahrenheit
  
  // Check if any reads failed and try again
  if (isnan(h) || isnan(c) || isnan(f)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  Serial.printf(
    "Humidity: %.1f  Temperature: %.1f deg C  %.1f deg F\n",
    h, c, f
  );

  lcd.setCursor(0, 0);
  lcd.print("Humidity: "); lcd.print(h, 1); lcd.print("%");
  
  lcd.setCursor(0, 2);
  lcd.print("Temperature: "); lcd.print(c, 2); lcd.write(0); lcd.print("C");

  lcd.setCursor(0, 3);
  lcd.print("Temperature: "); lcd.print(f, 1); lcd.write(0); lcd.print("F");

  delay(4000);
}