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

#define DHTPIN 2
#define DHTTYPE DHT22
#define RAINPIN 3

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  lcd.init();
  lcd.backlight();
  dht.begin();
  pinMode(RAINPIN, INPUT);
  lcd.setCursor(0, 0);
  lcd.print("Starting...");
  delay(2000);
  lcd.clear();
}

void loop() {
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();
  int rain = digitalRead(RAINPIN);

  if (isnan(humidity) || isnan(temperature)) {
    lcd.setCursor(0, 0);
    lcd.print("DHT Error!      ");
    lcd.setCursor(0, 1);
    lcd.print("Rain: ");
    lcd.print(rain == HIGH ? "No" : "Yes");
    delay(2000);
    lcd.clear();
    return;
  }

  lcd.setCursor(0, 0);
  lcd.print("T:");
  lcd.print(temperature, 1);
  lcd.print("C H:");
  lcd.print(humidity, 0);
  lcd.print("%    ");

  lcd.setCursor(0, 1);
  lcd.print("Rain: ");
  lcd.print(rain == HIGH ? "No" : "Yes");
  lcd.print("    ");

  delay(2000);
}