// Capteurs
 // temps , Temperature , humidité , Qualité d'Air , CO2 , NH3 , CO , NO2 , C3H8, C4H10, CH4 , H2 , C2H5OH
 // Enregistrement sur memoire interne
 #define DEBUG 0
 
 #include <LFlash.h>
 #include <LBattery.h>
 #include <Wire.h>
 #include <SeeedOLED.h>
 #include "MutichannelGasSensor.h"
 #include"AirQualityLinkitOne.h"
 
 AirQuality airqualitysensor;
 int32_t lastSlope = 4;
 
 //Capteur de co2
 const unsigned char cmd_get_sensor[] = { 0xff, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79 };
 unsigned char dataRevice[9];
 int CO2PPM;
 
 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;
 
 
 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("V3"); //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, 6, 0);}
 
   Serial1.begin(9600); //démarre la communication avec le capteur de CO2
 
   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.");
 
   gas.begin(0x04);//the default I2C address of the slave is 0x04
   gas.powerOn();
   Serial.print("Firmware Version = ");
   Serial.println(gas.getVersion());
   Serial.print(".....");
   SeeedOled.clearDisplay(); //Print the String
 }
 
 void loop() {
   float c;
   String dataString = "";  // Déclaration d'une chaine de caractere pour stoquer les données:
 
   int ret = dht.readHT(&tDHT, &hDHT); // lecture de la temperature de l'humidité
   //tDHT = tDHT - 3; //correction de temperature 
   Airquality = airqualitysensor.slope();
   AQ = airqualitysensor.current();
 
   if (dataRecieve() && hDHT > 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(CO2PPM);
     info("CO2:", CO2PPM, 3, 0);
     c = gas.measure_NH3();
     dataString += ",";
     dataString += String(c);
     info("NH3:", c, 4, 0);
     c = gas.measure_CO();
     dataString += ",";
     dataString += String(c);
     info("CO:", c, 5, 0);
     c = gas.measure_NO2();
     dataString += ",";
     dataString += String(c);
     info("NO2:", c, 6, 0);
     c = gas.measure_C3H8();
     dataString += ",";
     dataString += String(c);
     c = gas.measure_C4H10();
     dataString += ",";
     dataString += String(c);
     c = gas.measure_CH4();
     dataString += ",";
     dataString += String(c);
     c = gas.measure_H2();
     dataString += ",";
     dataString += String(c);
     c = gas.measure_C2H5OH();
     dataString += ",";
     dataString += String(c);
 
     Serial.println(dataString);
 
     LFile dataFile = LFlash.open("qualite_air_v3.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 CO2.txt");
     }
   }
   delay(10000);
 }
 
 bool dataRecieve(void)
 {
     byte data[9];
     int i = 0;
     //transmt command data
     for(i=0; i<sizeof(cmd_get_sensor); i++) { Serial1.write(cmd_get_sensor[i]); }
     delay(10);
     //begin reveiceing data
     if(Serial1.available()) { while(Serial1.available()) { for(int i=0;i<9; i++) { data[i] = Serial1.read(); } } }
     if((i != 9) || (1 + (0xFF ^ (byte)(data[1] + data[2] + data[3] + data[4] + data[5] + data[6] + data[7]))) != data[8]) { return false; }
     CO2PPM = (int)data[2] * 256 + (int)data[3];
     temperature = (int)data[4] - 40;
     return true;
 }
 
 
 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);
   }
 }