#include <Wire.h>
#include <SPI.h>
#include <LiquidCrystal_I2C.h>
#include <SD.h>
#include <RTClib.h>
#include <Adafruit_BMP280.h>
#include "DHT.h"
const int chipSelect = 10;
#define DHTPIN 2 
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
RTC_DS1307 RTC;
Adafruit_BMP280 bmp; // I2C
LiquidCrystal_I2C lcd(0x27,20,4);

char filename [] = "00000000.CSV";

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  Wire.begin();
  RTC.begin();
  // ligne suivante pour initialiser l'heure du RTC/PC  la premiere fois 
  // decocher les // , telecharger , puis remettre les // 
  // RTC.adjust(DateTime(__DATE__, __TIME__));
  dht.begin();
  bmp.begin(); 
   /* config par defaut suivant datasheet */
  bmp.setSampling(Adafruit_BMP280::MODE_NORMAL,     
                  Adafruit_BMP280::SAMPLING_X2,     
                  Adafruit_BMP280::SAMPLING_X16,    
                  Adafruit_BMP280::FILTER_X16,     
                  Adafruit_BMP280::STANDBY_MS_500); 
  SD.begin(chipSelect);               
}

void loop() { 
  float h = dht.readHumidity();
  float t1 = dht.readTemperature();
  float t2 = bmp.readTemperature();
  float p = bmp.readPressure();
  float tm = (t1+t2)/2;  
  DateTime now = RTC.now();
  uint16_t year1 = now.year();
  uint16_t month1 = now.month();
  uint16_t day1 = now.day();
  uint16_t hour1 = now.hour();
  uint16_t minute1 = now.minute();
  uint16_t second1 = now.second();
  filename[0] = (year1/1000)%10 + '0';
  filename[1] = (year1/100)%10 + '0';
  filename[2] = (year1/10)%10 + '0';
  filename[3] = (year1)%10 + '0';
  filename[4] = month1/10 + '0'; 
  filename[5] = (month1)%10 + '0'; 
  filename[6] = day1/10 + '0'; 
  filename[7] = (day1)%10 + '0';
  filename[8] = '.';
  filename[9] = 'c';
  filename[10] ='s';
  filename[11] ='v';
  
  String date = String(day1) + "/" + String(month1) + "/" + String(year1);
  String time = String(hour1) + ":" + String(minute1) + ":" + String(second1);
  lcd.setCursor(0,0);
  lcd.print(date) ;
  lcd.setCursor(11,0);
  lcd.print(time) ;
  lcd.setCursor(7,1);
  lcd.print(tm) ; 
  lcd.setCursor(12,1);
  lcd.print(char(223)) ;
  lcd.setCursor(13,1);
  lcd.print("C") ;     
  lcd.setCursor(0,2);
  lcd.print(h) ;
  lcd.setCursor(5,2);
  lcd.print("%Hu") ; 
  int roundp =  int(p);
  lcd.setCursor(9,2);
  lcd.print(p) ;
  lcd.setCursor(18,2);
  lcd.print("Pa") ;
  
  File dataFile = SD.open(filename, FILE_WRITE);
  String dataReg = String(year1) + "/" + String( month1) + "/" + String(day1) +";" + String(hour1) + ":"+ String(minute1) + ":" + String(second1) + ";" + String(tm) + ";" + String(h) + ";" + String(p) + ";" ; 
  dataFile.println(dataReg);
  dataFile.close();
  delay(60000);
}