/*
Pinout:
Sensor de humedad y temperatura = D4
sensor de luvia = VP = D36
sensor de humedad en suelo = 35
pantalla 3v = SCL = D22 // SDA = D21
servomotor 5v = D15
RTC = SCL = SCL = D22 // SDA = D21
RELÉ = D25
Botón 1 = D27
Botón 2 = D26
Led indicador de techo = D5
Led indicador de riego = D34
*/
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include "RTClib.h"
#include <ESP32Servo.h>
#include "DHT.h"

Servo miServo;
RTC_DS3231 rtc;

char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

#define pinDHT 4  //GPIO4 = D4 en ESP32
#define SCREEN_WIDTH 128  // OLED display width, in pixels
#define SCREEN_HEIGHT 64  // OLED display height, in pixels
#define OLED_RESET    -1  // Reset pin # (or -1 if sharing reset pin)
#define AO_PIN 36
#define HUM_PISO_PIN 35

Adafruit_SSD1306 display (SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
const int pinServo = 15; // Pin GPIO al que está conectado el servo 
DHT sensorTH (pinDHT, DHT22);
int estadoTecho = 0;

void setup() 
{
  Serial.begin(9600); 
  miServo.attach(pinServo,500,2500);
  sensorTH.begin ();

  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }
 
  if(! display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) 
  { 
      Serial.println(F("SSD1306 allocation failed"));
      for(;;); // Don't proceed, loop forever
  } 
  //rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  
  display.display();
  delay(2);
  display.clearDisplay(); 
  
  display.clearDisplay();
  display.setTextColor(WHITE);
  //display.startscrollright(0x00, 0x0F);
  display.setTextSize(2);
  display.setCursor(0,5);
  display.print("  Info ");
  display.display();
  delay(3000);
}

void loop()
{
  DateTime now = rtc.now();
  int humedad = round(sensorTH.readHumidity());
  int temperatura = round(sensorTH.readTemperature());
  int rain_value = analogRead(AO_PIN);
  float sensorHumPiso = analogRead(HUM_PISO_PIN);
  
  display.clearDisplay();
  if(now.second() >= 0 && now.second() < 5 || now.second() >= 10 && now.second() < 15 || now.second() >= 20 && now.second() < 25|| now.second() >= 30 && now.second() < 35|| now.second() >= 40 && now.second() < 45|| now.second() >= 50 && now.second() < 55  ){
    display.setTextSize(2);
    display.setCursor(75,0);
    display.println(now.second(), DEC);
    
    display.setTextSize(2);
    display.setCursor(25,0);
    display.println(":");
    
    display.setTextSize(2);
    display.setCursor(65,0);
    display.println(":");
    
    display.setTextSize(2);
    display.setCursor(40,0);
    display.println(now.minute(), DEC);
    
    display.setTextSize(2);
    display.setCursor(0,0);
    display.println(now.hour(), DEC);
  }else{
    
    display.setTextSize(1);
    display.setCursor(0,0);
    display.println("Humedad Tierra: ");

    display.setTextSize(1);
    display.setCursor(92,0);
    display.println(sensorHumPiso);
  }

  if(now.second() >= 0 && now.second() < 10 || now.second() >= 20 && now.second() < 30 || now.second() >= 40 && now.second() < 50  ){
    display.setTextSize(1);
    display.setCursor(0,20);
    display.println("Temperatura: ");
    display.setTextSize(1);
    display.setCursor(70,20);
    display.println (temperatura);
    display.setTextSize(1);
    display.setCursor(85,20);
    display.println("Grados");
  }else{
    display.setTextSize(1);
    display.setCursor(0,20);
    display.println("Humedad: ");

    display.setTextSize(1);
    display.setCursor(50,20);
    display.println(humedad);

    display.setTextSize(1);
    display.setCursor(65,20);
    display.println("%");
  } 
  //Servomotor que cambia cada 10 segundo
  if(now.second() >= 0 && now.second() < 10 || now.second() >= 20 && now.second() < 30 || now.second() >= 40 && now.second() < 50  )
  {
    estadoTecho = 90;
    miServo.write(estadoTecho);
  }else{
    estadoTecho = 0;
    miServo.write(estadoTecho);
  }

  if(now.second() >= 0 && now.second() < 5 || now.second() >= 10 && now.second() < 15 || now.second() >= 20 && now.second() < 25|| now.second() >= 30 && now.second() < 35|| now.second() >= 40 && now.second() < 45|| now.second() >= 50 && now.second() < 55  ){
    display.setTextSize(2);
    display.setCursor(0,40);
    if(estadoTecho == 90){
      display.print("Techo ON");
    }else if(estadoTecho == 0){
      display.print("Techo OFF");
    }
  }else{
    display.setTextSize(1);
    display.setCursor(0,40);
    display.print("Lluvia: ");

    display.setTextSize(1);
    display.setCursor(50,40);
    display.print(rain_value, DEC);
  }
  
  display.display(); 
}