#include "DHT.h"
#include "LiquidCrystal_I2C.h" //LCD 16x2 library

#define DHTPIN 26     // Digital pin connected to the DHT sensor
//int DHTPIN = 26;
#define RAIN_ANALOG 34

#define redLED 5
#define yellowLED 4
#define greenLED 2

//#define DHTTYPE DHT11   // DHT 11
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
//#define DHTTYPE DHT21   // DHT 21 (AM2301)

LiquidCrystal_I2C lcd(0x27, 16, 2); // LCD 16x2

DHT dht(DHTPIN, DHTTYPE);

void setup() 
{
  Serial.begin(9600);

//=========Rain================
  pinMode(RAIN_ANALOG, INPUT);
//=============================
//=========LED=================
pinMode(redLED, OUTPUT);
pinMode(yellowLED, OUTPUT);
pinMode(greenLED, OUTPUT);
//=============================

  lcd.init();
  lcd.backlight();

  Serial.println(F("DHTxx test!"));
  dht.begin();
}

void loop() 
{
    
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();
  // Read temperature as Fahrenheit (isFahrenheit = true)
  float f = dht.readTemperature(true);

  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  lcd.setCursor(0, 0);
  lcd.print("H:");
  lcd.print(h);

  lcd.setCursor(9, 0);
  lcd.print("T: ");
  lcd.print(t);

  Serial.print(F("Humidity: "));
  Serial.println(h);
  Serial.print(F("%  Temperature: "));
  Serial.println(t);
  Serial.print(F("°C "));

//========Rain===============

  float rainValue = analogRead(RAIN_ANALOG);
  Serial.print("Rain amount: "); //1680 - 3620   // <1680 No Rain// >=1680 Drizziling// >2200 Heavy Rain
  Serial.println(rainValue);
  lcd.setCursor(1, 1);
  lcd.print("  R:");
  lcd.print(rainValue);

  if (rainValue <= 1680 )
  {
  Serial.print("No Rain");
  digitalWrite(redLED, LOW); 
  digitalWrite(yellowLED, LOW); 
  digitalWrite(greenLED, HIGH); 
  }
  else if (rainValue > 1680 && rainValue < 2200)
  {
  Serial.print("Drizziling");
  digitalWrite(redLED, LOW); 
  digitalWrite(yellowLED, HIGH); 
  digitalWrite(greenLED, LOW); 
  }
  else if (rainValue >= 2200)
  {
  Serial.print("Heavy Rain");
  digitalWrite(redLED, HIGH); 
  digitalWrite(yellowLED, LOW); 
  digitalWrite(greenLED, LOW); 
  }
//================================

  delay(1000);
}