// Capteurs
 // temps , Qualité d'Air , Temperature , humidité , Ratio particule , Concentration Particules
 // Enregistrement sur memoire interne
 #define DEBUG 0
 
 #include <LFlash.h>
 #include <LBattery.h>
 #include <Wire.h>
 #include <SeeedOLED.h>
 #include"AirQualityLinkitOne.h"
 
 AirQuality airqualitysensor;
 int32_t lastSlope = 4;
 
 int temperature;
 int Airquality;
 int AQ;
 String Time;
 
 //Capteur d'humidité et temperature
 #include "DHT.h"
 #define DHTPIN 2 // what pin we're connected to
 #define DHTTYPE DHT22   // DHT 22  (AM2302)
 DHT dht(DHTPIN, DHTTYPE);
 float tDHT;
 float hDHT;
 
 //Grove - Dust Sensor Demo v1.0
 int Dustpin = 8;
 unsigned long duration;
 unsigned long starttime;
 unsigned long sampletime_ms = 30000;//sampe 30s ;
 unsigned long lowpulseoccupancy = 0;
 float ratio = 0;
 float concentration = 0;
 
 void setup() {
   Wire.begin();
   SeeedOled.init();  //initialze SEEED OLED display
   SeeedOled.clearDisplay();          //clear the screen and set start position to top left corner
   SeeedOled.setNormalDisplay();      //Set display to normal mode (i.e non-inverse mode)
   SeeedOled.setPageMode();           //Set addressing mode to Page Mode
   SeeedOled.setTextXY(0, 0);         //Set the cursor to Xth Page, Yth Column
   SeeedOled.putString("Capteur polution"); //Print the String
   SeeedOled.setTextXY(1, 14);         //Set the cursor to Xth Page, Yth Column
   SeeedOled.putString("V4"); //Print the String
   SeeedOled.setTextXY(2, 5);         //Set the cursor to Xth Page, Yth Column
   SeeedOled.putString("(ppm)"); //Print the String
   SeeedOled.setTextXY(5, 0);         //Set the cursor to Xth Page, Yth Column
   SeeedOled.putString("Initialisation.."); //Print the String
   if (LBattery.isCharging()) {
     info("En Charge...", -1, 7, 3);
   }
 
   dht.begin();  // initialise le capteur d'humidité
   airqualitysensor.init(A0);  // initialise le capteur qualité d'air
   Serial.print("Premiere valeur de qualité d'air : ");
   Serial.println(airqualitysensor.initValue);
   //Ouvre le port serie
   Serial.begin(9600);
   Serial.print("Initialisation de la memoire Flash...");
   LFlash.begin();
   Serial.println("memoire flash initialisée.");
   SeeedOled.clearDisplay(); //Print the String
 
   pinMode(Dustpin, INPUT);
   starttime = millis();//get the current time;
 }
 
 void loop() {
   String dataString = "";  // Déclaration d'une chaine de caractere pour stoquer les données:
 
   duration = pulseIn(Dustpin, LOW);
   lowpulseoccupancy = lowpulseoccupancy + duration;
 
   if ((millis() - starttime) > sampletime_ms) //if the sampel time == 30s
   {
     ratio = lowpulseoccupancy / (sampletime_ms * 10.0); // Integer percentage 0=>100
     concentration = 1.1 * pow(ratio, 3) - 3.8 * pow(ratio, 2) + 520 * ratio + 0.62; // using spec sheet curve
     lowpulseoccupancy = 0;
     starttime = millis();
   }
 
   int ret = dht.readHT(&tDHT, &hDHT); // lecture de la temperature de l'humidité
   Airquality = airqualitysensor.slope();
   AQ = airqualitysensor.current();
 
   if (hDHT > 0 && lowpulseoccupancy == 0 ) //Si on a recus des donnée du capteur de CO2 et d'humidité
   {
     int m = millis();
     Time = String(m / (1000 * 60 * 60)) + ":" + String((m % (1000 * 60 * 60)) / (1000 * 60)) + ":" +  String(((m % (1000 * 60 * 60)) % (1000 * 60)) / 1000);
     dataString += Time;
     info(Time, -1, 0, 0);
     if (LBattery.isCharging()) {
       info(">", LBattery.level(), 0, 9);
     } else {
       info("%", LBattery.level(), 0, 9);
     }
     dataString += ",";
     dataString += String(Airquality);
     dataString += ",";
     dataString += String(AQ);
     info("AQ:", AQ, 1, 0);
     dataString += ",";
     dataString += String(tDHT);
     info("T:", tDHT, 2, 0);
     dataString += ",";
     dataString += String(hDHT);
     info("H:", hDHT, 2, 8);
     dataString += ",";
     dataString += String(ratio);
     info("Particules", -1, 5, 0);
     info("Ratio:", ratio, 6 , 0);
      dataString += ",";
     dataString += String(concentration);
     info("pcs/L:", concentration, 7 , 0);   
     
     Serial.println(dataString);
 
     LFile dataFile = LFlash.open("qualite_air_v4.txt", FILE_WRITE); // ouverture du fichier CO2
     // Si le fichier est ouvert on ecris les données
     if (dataFile) {
       dataFile.println(dataString);
       dataFile.close(); //Fermeture du fichier
     } else {
       Serial.println("erreur d'ouverture du fichier");
     }
   }
   delay(5000);
 }
 
 void info(String data, float val, int Row, int Column)
 {
   char _data[data.length() + 1];
   data.toCharArray(_data, data.length() + 1);
   SeeedOled.setTextXY(Row, Column);         //Set the cursor to Xth Page, Yth Column
   SeeedOled.putString(_data); //Print the String
   if (val >= 0) {
     SeeedOled.setTextXY(Row, Column + data.length());
     SeeedOled.putFloat(val);
   }
 }