//biblioteques
#include <LiquidCrystal_I2C.h>
#include "RTClib.h"
#include "Adafruit_SHT31.h"
#include <Arduino.h>
#include <Wire.h>
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);//écran
Adafruit_SHT31 sht31 = Adafruit_SHT31();//thermometre
RTC_DS1307 RTC;//horloge

//radio
RF24 radio(10, 9); // CE, CSN
const byte address[7] = "00001";

//led
int led=7;

//chauffage simulation
void chauffage(int ton, int toff){
  digitalWrite(led,HIGH);
  delay(ton);
  digitalWrite(led,LOW);
  delay(toff);
  }
void setup() {
  Serial.begin(115200);
  pinMode (led,OUTPUT);//led
  lcd.init();//allumer ecran
  lcd.backlight();//lumière
  RTC.begin();//allumer horloge
  while (!Serial)//attendre que la console s'affiche
  //test capteur temp
  Serial.println("SHT31 test");
  if (! sht31.begin(0x44)) {
  Serial.println("Couldn't find SHT31");
  while (1) delay(1);
  }
  //test horloge
  if (! RTC.isrunning()) {
      Serial.println("RTC is NOT running!");
      // following line sets the RTC to the date & time this sketch was compiled
      RTC.adjust(DateTime(__DATE__, __TIME__));
        }
  //initialiser radio     
  radio.begin();
  radio.openReadingPipe(0, address);
  radio.setPALevel(RF24_PA_MIN);
  radio.startListening();
}
void loop() {
    Serial.println("******************** Informations ********************");
    //horloge
    /*DateTime now = RTC.now();
    lcd.setCursor (0,0);
    lcd.print(now.year(), DEC);
    lcd.print('/');
    lcd.print(now.month(), DEC);
    lcd.print('/');
    lcd.print(now.day(), DEC);
    lcd.print(' ');
    lcd.print(now.hour(), DEC);
    lcd.print(':');
    lcd.print(now.minute(), DEC);
    lcd.print(':');
    lcd.print(now.second(), DEC);*/
    
    //afficher cours et nb eleve
    String cours = "Maths";
    Serial.print("Matière en cours :");
    Serial.print("\t\t");
    Serial.println(cours);
    int nb_eleve= 6;
    Serial.print("Nombre d'élève en cours :");
    Serial.print("\t");
    Serial.println(nb_eleve);

    //puissance eleve
    int P_eleve=nb_eleve*100;
    Serial.print("Puissance des élèves :");
    Serial.print("\t\t");
    Serial.println(String(P_eleve)+" W");

    /*lcd.setCursor (0,0);
    lcd.print(cours);
    lcd.print(nb_eleve);
    lcd.print(" eleves ");*/

    //lecture port
    int adc = analogRead(A0);
    float voltage = adc*5/1023.0;
    float current = (voltage-2.2)/0.190;
    float P_salle = 230*current;
    Serial.print("Puissance des ordinateurs :");
    Serial.print("\t");
    Serial.println(String(P_salle)+" W");

    //temperature exterieur
    float T_ext=12;
    lcd.setCursor (9,0);
    lcd.print("Ex:");
    lcd.print(T_ext,0);
    lcd.print(" C");
    Serial.print("Temp extérieur :");
    Serial.print("\t\t");
    Serial.println(String(T_ext)+" °C");
    //radio.read(&te, sizeof(T_ext));

    //acquerir temperature interieur
    float T_int = sht31.readTemperature();;
    if (! isnan(T_int)) {  // check if 'is not a number'
    Serial.print("Temp intérieur :");
    Serial.print("\t\t");
    Serial.println(String(T_int)+" °C");
    lcd.setCursor (0,0);
    lcd.print("In:");
    lcd.print(T_int,0);
    lcd.print(" C");
    }
    else {
    lcd.print("Error");
    T_int=0.0;
    Serial.println("Failed to read temperature");
    }

    //caclules puissances
    float P_solaire=500;
    float T_mod;
    float T_cons=20;
    float T_bp=10;
    float fact;
    float Pgratis;
    Pgratis = P_salle+P_eleve+P_solaire;

    Serial.print("Temp consigne :");
    Serial.print("\t\t\t");
    Serial.println(String(T_cons)+" °C");

    Serial.print("Puissance solaire :");
    Serial.print("\t\t");
    Serial.println(String(P_solaire)+" W");

    Serial.print("Puissance gratuite :");
    Serial.print("\t\t");
    Serial.println(String(Pgratis)+" W");

    T_mod= T_cons - T_bp;

    /*if (T_int>T_cons){
      fact=0;
    }*/
    if (T_ext > T_cons){
       fact=0;
    }
    if ((T_ext < 10)||(T_int < 15)){
     fact=100;
    }
    if ((T_mod < T_ext) && (T_ext < T_cons)){
      fact=(100/T_bp)*(T_cons - T_ext);
    }
    Serial.print("Facteur de marche :");
    Serial.print("\t\t");
    Serial.println(String(fact));


    float Ptheo = (3000* fact)/100;
    lcd.setCursor (0,1);
    lcd.print("Pth: "+String(Ptheo));

    Serial.print("Puissance théorique :");
    Serial.print("\t\t");
    Serial.println(String(Ptheo)+" W");


    float Pelec_reel = Ptheo - Pgratis;
    lcd.setCursor(8,1);
    lcd.print(" Pr: "+String(Pelec_reel));

    Serial.print("Puissance réelle :");
    Serial.print("\t\t");
    Serial.println(String(Pelec_reel)+" W");


    float fact_cor = Pelec_reel/3000;

    Serial.print("Facteur corrigé :");
    Serial.print("\t\t");
    Serial.println(String(fact_cor));


    int periode = 10000;
    int Ton = periode * fact_cor;
    int Toff = periode - Ton;

    Serial.print("Periode allumé :");
    Serial.print("\t\t");
    Serial.println(String(Ton)+" ms");

    Serial.print("Periode éteinte :");
    Serial.print("\t\t");
    Serial.println(String(Toff)+" ms");

    //simulation chauffage
    chauffage(Ton,Toff);

    lcd.println();    
    Serial.println();
}