//-- Libreries
#include <dht.h> //DHT and LCD libraries
#include <LiquidCrystal_I2C.h>

//-- Pins LCD and sensor
#define I2C_ADDR 0x27
#define BACKLIGHT_PIN 3
#define En_pin 2
#define Rw_pin 1
#define Rs_pin 0
#define D4_pin 4
#define D5_pin 5
#define D6_pin 6
#define D7_pin 7
#define DHT11_PIN 2 //Declaring where the DHT signal pin is wired

//-- LCD functions
LiquidCrystal_I2C lcd(I2C_ADDR, En_pin, Rw_pin, Rs_pin, D4_pin, D5_pin, D6_pin, D7_pin);

//-- Environment sensor functions
dht DHT; //Declaring the DHT as a dht type to use it later

//-- LED pins declaration
int redpin = 11; //select the pin for the red LED
int bluepin = 10; // select the pin for the  blue LED
int greenpin = 9; // select the pin for the green LED

//--FC32 pin declaration   - soil moisture
int msensor = A0;

//--FAN pin declaration
int fan = 3;

//--auxiliar Variables 
int humedad = 0; //FC32
int humedadmap = 0;
int minhumedad = 80;
float tempe = DHT.temperature; //DHT 11 - read temperature
float maxtempe = 35;
float humrel = DHT.humidity; //DHT 11 - read humidity
float maxhumrel = 90;
int aux1 = 0;
int aux2 = 0;


// initial configuracion
void setup() {
  Serial.begin(9600);
  // for led
  pinMode(redpin, OUTPUT);
  pinMode(bluepin, OUTPUT);
  pinMode(greenpin, OUTPUT);

  // for screen
  lcd.begin (16, 2);
  lcd.setBacklightPin(BACKLIGHT_PIN, POSITIVE);
  lcd.setBacklight(HIGH); //Lighting backlight
  lcd.home ();

  // for fan
  pinMode(fan, OUTPUT);
  digitalWrite (fan, LOW);

}

// what is gooing to be done
void loop() {
  //LEER VALORES
  //FC32
  humedad = analogRead(msensor);
  humedadmap = map(humedad, 550, 10, 0 , 100); //hace regla de 3
  /*
     Serial.print("Humedad: ");
     Serial.print (humedad);
     Serial.println("% ");
     delay (1000);
  */

  //DTH11
  int chk = DHT.read11(DHT11_PIN);
  tempe = DHT.temperature;
  humrel = DHT.humidity;

  /*
    Serial.print("Tem= ");
    Serial.println(DHT.temperature);
    Serial.print("Humidity= ");
    Serial.println(DHT.humidity);
    delay(1000);
  */

  //FC32 compare
  if (humedadmap <= minhumedad)
  {
    digitalWrite(redpin, HIGH);
    digitalWrite(greenpin, LOW);
    digitalWrite(bluepin, LOW);
    delay(500);
  }
  else {
    // if ((humedadmap >= 0) && (humedadmap < minhumedad))

    digitalWrite(redpin, LOW);
    digitalWrite(greenpin, HIGH);
    digitalWrite(bluepin, LOW);
    delay(500);
  }


  //SEND DHT11 VALUES TO LCD
  lcd.setCursor(0, 0); //Setting the position where you want to start writing the message (0,0) is top left
  lcd.print("TEMP:"); //Message to display
  lcd.setCursor(7, 0); //Start writing on the position (7,1)
  lcd.print(tempe);
  lcd.println(" C ");
  lcd.setCursor(0, 1); //Setting the position where you want to start writing the message (0,0) is top left
  lcd.print("HUMIDITY:"); //Message to display
  lcd.setCursor(9, 1); //Start writing on the position (9,1)
  lcd.print(humrel);
  lcd.println("% ");
  delay(4000); //Display time

  // DHT11 compare - ACTIVATE FAN
  if ((tempe >= maxtempe) || (humrel >= maxhumrel))
  {
    digitalWrite(fan, HIGH);
    delay(3000);
  }

  if ((tempe < maxtempe) || (humrel < maxhumrel))
  {
    digitalWrite(fan, LOW);
    delay(3000);
  }

}