#include "DHT.h"
#define DHTPIN 26     // Digital pin connected to the DHT sensor
#include "LiquidCrystal_I2C.h"


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

DHT dht(DHTPIN, DHTTYPE);

//===========Soil Pin & LED Pin============
int rainPin = 34;
int greenLED = 2;
int redLED = 5;
int yellowLED = 4;

int thresholdValue = 800;
//=========================================

LiquidCrystal_I2C lcd(0x27, 16, 2); 

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

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

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

//==========Soil + LED===============
  pinMode(rainPin, INPUT);
  pinMode(greenLED, OUTPUT);
  pinMode(redLED, OUTPUT);
  pinMode(yellowLED, OUTPUT);
 // digitalWrite(greenLED, LOW);
 // digitalWrite(redLED, LOW);
//=========================================
}

void loop() 
{
//==========DHT=========================================
  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();
  float f = dht.readTemperature();

  // 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(1, 0);
  lcd.print("Hum = ");
  lcd.print(h);
  lcd.setCursor(1, 1);
  lcd.print("Temp = ");
  lcd.print(t);
  Serial.print(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.print(F("°C "));
//======================================================

//==========Soil + LED=========================================
// read the input on analog pin 0:
  int sensorValue = analogRead(rainPin);
  Serial.print("Sensor Value = ");
  Serial.println(sensorValue);

  if(sensorValue <= 1680)//1680 - 3620
  {
    Serial.println(" No Rain ");
    digitalWrite(redLED, LOW);
    digitalWrite(yellowLED, LOW);
    digitalWrite(greenLED, HIGH);
  }
  else if(sensorValue >1680 && sensorValue <= 3000)
  {
    Serial.println("Drizziling");
    digitalWrite(redLED, LOW);
    digitalWrite(yellowLED, HIGH);
    digitalWrite(greenLED, LOW);
  }
  else if(sensorValue > 3000)
  {
    Serial.println("Heavy Rain");
    digitalWrite(redLED, HIGH);
    digitalWrite(yellowLED, LOW);
    digitalWrite(greenLED, LOW);
  }
 //======================================================






  // Wait a few seconds between measurements.
  delay(2000);
}