/*
 * Barometer_Sensor_nenei.ino
 * Example sketch for barometer.
 * Measure pressure and temperature, calculate time variation of pressure and display them.
 * 
 * Website    : masserv.utcluj.ro/~florind/microcontrollers/
 * Author     : Florin Dragan, UTC-N
 * Create Time: 12 february 2015
 * Change Log :
 * 
 * Based on libraries created on 2012 by seeed technology inc. Copyright (c)
 * Website    : www.seeed.cc
 * Author     : Jim Lindblom, LG
 * Create Time: 2012
 * Change Log :
 *
 * The MIT License (MIT)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#undef max
#undef min

#include <WiFi.h>
#include <WiFiUdp.h>
#include "time.h"


#include <Seeed_BMP280.h>  //BMP280
#include <Wire.h>
#include <stdint.h>
#include <TFTv2_ESP.h>
#include <SPI.h>

#define P_scale 5   // pressure graphical display scale 
#define dP_scale 2   // pressure variation graphical display scale 
#define FONT_SPACE 7

const char *ssid[] = {"Acasuca", "Acasuca_2.4G", "masserv-1"};
const char *password[]={"pavlov61ap7", "kNY2ph3mmrnT6zk4", "protocoale"};

//const char* ntpServer = "pool.ntp.org";

const unsigned long GMT_Offset = 7200;  // in seconds
const unsigned long daylightOffset = 3600;  // in seconds

// You can specify the time server pool and the offset (in seconds, can be
// changed later with setTimeOffset() ). Additionaly you can specify the
// update interval (in milliseconds, can be changed using setUpdateInterval() ).

 // Array of days
     char *daysOfWeek[] = {
         "Dum",
         "Lun",
         "Mar",
         "Mie",
         "Joi",
         "Vin",
         "Sam"
     };

unsigned char ss, ss_0 = 1, mm, hh, d, wd, m ;  //DATE/TIME variable
unsigned int y ;  //DATE/TIME variable
boolean start_flag = 1, un_minut_flag = 1, sase_minute_flag = 1;

float temperature = 0, temperature_0;
unsigned long pressure, pressure_0, pressure_init;
float atm, atm_0;
unsigned long m_pressure = 0;
unsigned long ts;

//    unsigned char T_min_0 = 0, T_min = 0;  //used as "time period" to calculate dP/dt  
    int delta_P;

long buff_P[240];  // pressure buffer, 240 samples lengh 

  BMP280 bmp280;

  struct tm timeinfo;


void setup(){

  Serial.begin(115200);

  // Connect to Wi-Fi

    connectToWiFi();
 
 
  // Init and get the NTP time
     adjustTime();
     ReadDateTime();

 //  Wire.begin();  // Not neede because next function do it

  if (!bmp280.init()) {
    Serial.println("Device not connected or broken!");
  }

    unsigned char samples = 32; // number of reading samples
    
    while (samples--){
   temperature += bmp280.getTemperature(); //Get the temperature, MUST be called first
   }
    temperature = temperature / samples;

    delay(10);

    samples = 32; // number of reading samples
    
    while (samples--){

    pressure = bmp280.getPressure();  //Get 32 pressure samples
    m_pressure = m_pressure + pressure;  // add 32 samples
    }

    pressure_init = m_pressure >> 5; // divide by 2^5 = 32 number of samples
    pressure = pressure_init;

   for (unsigned char j=0; j<240; j++){   // populate the buffer with initial read pressure value
   buff_P[j] = pressure_init;
   }

   Tft.TFTinit();                                  // init TFT library and SPI
 
    Tft.drawString("Soare+", 0, 0, 2, YELLOW);      // draw fixed display strings
    Tft.drawString("Ploaie-", 0, 230, 2, GRAY2);
    Tft.drawString("Pres:", 0, 255, 2, GRAY1);
    Tft.drawString("hPa", 172, 250, 2, CYAN);
    Tft.drawString("atm", 172, 268, 2, CYAN);
    Tft.drawString("Temp:", 0, 304, 2, GRAY1);
    Tft.drawString("'C", 172, 304, 2, CYAN);
    Tft.drawString("dP/dt:", 0, 286, 2, GRAY1);
    Tft.drawString("hPa/h", 172, 286, 2, CYAN);
    Tft.drawFloat(float(pressure_init)/100, 2, 0, 80, 1, GRAY1); // draw the initial value as a reference axis 
    Tft.drawString("dP", 0, 170, 1, GRAY1);
}


void loop()
{
  // Get Date/Time to be used to run each minute and each 6 minutes

    getLocalTime(&timeinfo);

  // Run each minute

    if (((timeinfo.tm_sec == 0) && (ss_0 != 0)) || start_flag==1)  {  
//     ss_0 = timeinfo.tm_sec;

  temperature_0 = temperature;
  temperature = bmp280.getTemperature(); //Get the temperature, MUST be called first

  pressure_0 = pressure;
  m_pressure = 0;

  unsigned char samples = 32;
    
    while (samples--){
    pressure = bmp280.getPressure();//Get the pressure
    m_pressure = m_pressure + pressure;
    }

    pressure = m_pressure >> 5;
    
   atm_0 = atm;  // pressure on "atm" units
   atm = float(pressure) / 101325; // 1 atm = 101325 Pa

unsigned char  Pos_X = 100, Char_size = 1;

// Clear previously displayed values

    Tft.drawFloat(float(pressure_0)/100, 2, 80, 250,2, BLACK);
//    Tft.drawNumber(T_min_0, 204, 0, 2, BLACK);

// Clear Date/Time
// Date
   Tft.drawString(daysOfWeek[wd], Pos_X, 0, Char_size, BLACK);
   Pos_X += 4*FONT_SPACE*Char_size ;

   if (d<10) { Tft.drawChar('0', Pos_X, 0, Char_size, BLACK);
  Pos_X += FONT_SPACE*Char_size ;
    Tft.drawNumber(d,  Pos_X, 0, Char_size, BLACK);
  Pos_X += FONT_SPACE*Char_size ;
}
  else { Tft.drawNumber(d, Pos_X, 0, Char_size, BLACK);
  Pos_X += 2*FONT_SPACE*Char_size ;
}
  Tft.drawChar('-', Pos_X, 0, Char_size, BLACK);
  Pos_X += FONT_SPACE*Char_size ;

   if (m<10) { Tft.drawChar('0', Pos_X, 0, Char_size, BLACK);
  Pos_X += FONT_SPACE*Char_size ;
    Tft.drawNumber(m,  Pos_X, 0, Char_size, BLACK);
  Pos_X += FONT_SPACE*Char_size ;
}
 else { Tft.drawNumber(m, Pos_X, 0, Char_size, BLACK);
  Pos_X += 2*FONT_SPACE*Char_size ;
}

  Tft.drawChar('-', Pos_X, 0, Char_size, BLACK);
  Pos_X += FONT_SPACE*Char_size ;

   if (y<10) { Tft.drawChar('0', Pos_X, 0, Char_size, BLACK);
  Pos_X += FONT_SPACE*Char_size ;
    Tft.drawNumber(y,  Pos_X, 0, Char_size, BLACK);
  Pos_X += FONT_SPACE*Char_size ;
}
 else { Tft.drawNumber(y, Pos_X, 0, Char_size, BLACK);
  Pos_X += 4*FONT_SPACE*Char_size ;
}

  Pos_X += 4*Char_size ;

// Time
   if (hh<10) { Tft.drawChar('0', Pos_X, 0, Char_size, BLACK);
  Pos_X += FONT_SPACE*Char_size ;
    Tft.drawNumber(hh,  Pos_X, 0, Char_size, BLACK);
  Pos_X += FONT_SPACE*Char_size ;
}
  else { Tft.drawNumber(hh, Pos_X, 0, Char_size, BLACK);
  Pos_X += 2*FONT_SPACE*Char_size ;
}
  Tft.drawChar(':', Pos_X, 0, Char_size, BLACK);
  Pos_X += FONT_SPACE*Char_size ;

   if (mm<10) { Tft.drawChar('0', Pos_X, 0, Char_size, BLACK);
  Pos_X += FONT_SPACE*Char_size ;
    Tft.drawNumber(mm,  Pos_X, 0, Char_size, BLACK);
  Pos_X += FONT_SPACE*Char_size ;
}
 else { Tft.drawNumber(mm, Pos_X, 0, Char_size, BLACK);
  Pos_X += 2*FONT_SPACE*Char_size ;
}

/*
  Tft.drawChar(':', Pos_X, 0, Char_size, BLACK);
  Pos_X += 8*Char_size ;

   if (ss<10) { Tft.drawChar('0', Pos_X, 0, Char_size, BLACK);
  Pos_X += 8*Char_size ;
    Tft.drawNumber(ss,  Pos_X, 0, Char_size, BLACK);
  Pos_X += 8*Char_size ;
}
 else { Tft.drawNumber(ss, Pos_X, 0, Char_size, BLACK);
}
*/
    Tft.drawFloat(atm_0,4, 80, 268, 2, BLACK);
    Tft.drawFloat(temperature_0, 2, 80, 304, 2, BLACK); 

// Read DATE/TIME from NTP Server

   if ((&timeinfo, "%H:%M:%S") == "14:40:00" ) {
   adjustTime();
   }
   ReadDateTime();

// Display last calculated values

    Tft.drawFloat(float(pressure)/100, 2, 80, 250, 2, GREEN);
//    Tft.drawNumber(T_min, 204, 0, 2, GREEN);

// Displays Date/Time
// Date

 Pos_X = 100 ;

   Tft.drawString(daysOfWeek[wd], Pos_X, 0, Char_size, GREEN);
   Pos_X += 4*FONT_SPACE*Char_size ;


   if (d<10) { Tft.drawChar('0', Pos_X, 0, Char_size, GREEN);
  Pos_X += FONT_SPACE*Char_size ;
    Tft.drawNumber(d,  Pos_X, 0, Char_size, GREEN);
  Pos_X += FONT_SPACE*Char_size ;
}
  else { Tft.drawNumber(d, Pos_X, 0, Char_size, GREEN);
  Pos_X += 2*FONT_SPACE*Char_size ;
}
  Tft.drawChar('-', Pos_X, 0, Char_size, GREEN);
  Pos_X += FONT_SPACE*Char_size ;

   if (m<10) { Tft.drawChar('0', Pos_X, 0, Char_size, GREEN);
  Pos_X += FONT_SPACE*Char_size ;
    Tft.drawNumber(m,  Pos_X, 0, Char_size, GREEN);
  Pos_X += FONT_SPACE*Char_size ;
}
 else { Tft.drawNumber(m, Pos_X, 0, Char_size, GREEN);
  Pos_X += 2*FONT_SPACE*Char_size ;
}

  Tft.drawChar('-', Pos_X, 0, Char_size, GREEN);
  Pos_X += FONT_SPACE*Char_size ;

   if (y<10) { Tft.drawChar('0', Pos_X, 0, Char_size, GREEN);
  Pos_X += FONT_SPACE*Char_size ;
    Tft.drawNumber(y,  Pos_X, 0, Char_size, GREEN);
  Pos_X += FONT_SPACE*Char_size ;
}
 else { Tft.drawNumber(y, Pos_X, 0, Char_size, GREEN);
  Pos_X += 4*FONT_SPACE*Char_size ;
}

  Pos_X += 4*Char_size ;

// Time
   if (hh<10) { Tft.drawChar('0', Pos_X, 0, Char_size, GREEN);
  Pos_X += FONT_SPACE*Char_size ;
    Tft.drawNumber(hh,  Pos_X, 0, Char_size, GREEN);
  Pos_X += FONT_SPACE*Char_size ;
}
  else { Tft.drawNumber(hh, Pos_X, 0, Char_size, GREEN);
  Pos_X += 2*FONT_SPACE*Char_size ;
}
  Tft.drawChar(':', Pos_X, 0, Char_size, GREEN);
  Pos_X += FONT_SPACE*Char_size ;

   if (mm<10) { Tft.drawChar('0', Pos_X, 0, Char_size, GREEN);
  Pos_X += FONT_SPACE*Char_size ;
    Tft.drawNumber(mm,  Pos_X, 0, Char_size, GREEN);
  Pos_X += FONT_SPACE*Char_size ;
}
 else { Tft.drawNumber(mm, Pos_X, 0, Char_size, GREEN);
  Pos_X += 2*FONT_SPACE*Char_size ;
}

/*
  Tft.drawChar(':', Pos_X, 0, Char_size, GREEN);
  Pos_X += 8*Char_size ;

   if (ss<10) { Tft.drawChar('0', Pos_X, 0, Char_size, GREEN);
  Pos_X += 8*Char_size ;
    Tft.drawNumber(ss,  Pos_X, 0, Char_size, GREEN);
  Pos_X += 8*Char_size ;
}
 else { Tft.drawNumber(ss, Pos_X, 0, Char_size, GREEN);
}
*/
    Tft.drawFloat(atm,4, 80, 268, 2, GREEN);
    Tft.drawFloat(temperature, 2, 80, 304, 2, BRIGHT_RED);
 
  // Run each 6 minutes

    if ((mm %6 == 0) && (timeinfo.tm_sec == 0) || start_flag == 1 )  {

   Serial.println(&timeinfo, "%T");

     int dP;

   // Clear previously displayed pressure P values and points

    for (unsigned char j=0; j<240; j++){

    Tft.setPixel(239-j,90 - ((buff_P[j]-pressure_init)/P_scale), BLACK);

   // Clear previously displayed pressure dP/dt values and points
     dP = buff_P[j] - buff_P[j+1];
     if (dP < 2 && dP > -2) dP = 0;

    Tft.setPixel(239-j, 180 - (dP/dP_scale), BLACK);
 
  }
    
    Tft.drawFloat(float(delta_P)/100,2, 80, 286, 2, BLACK);

   // Shift right 1 location each sample value, to create a FIFO queue
    for (unsigned char j=239; j>0; j--){
     buff_P[j] = buff_P[j-1] ;  //deplaseaza elementele cu 1 pozitie spre dreapta
    }

      buff_P[0] = pressure;
      delta_P = buff_P[0] - buff_P[1]; //calculate dP from two consecutive values

    for (unsigned char j=0; j<240; j++){

  // Displays P(t) pressure time variation graph
    Tft.setPixel(239-j, 90 - ((buff_P[j]-pressure_init)/P_scale), GREEN);


     dP = buff_P[j] - buff_P[j+1];
     if (dP < 2 && dP > -2) dP = 0;

    Tft.setPixel(239-j, 180 - (dP/dP_scale), YELLOW);  //afiseaza semnalul in timp
    }

    Tft.drawFloat(float(delta_P)/100,2, 80, 286, 2, YELLOW);

  } //end run each 6 minutes

//        T_min_0 = T_min;
//        T_min = T_min+1;

    start_flag = 0;

 } //end run each minute

    ss_0 = timeinfo.tm_sec;
 
} //end loop



/* Functions and Macros   */

void connectToWiFi() {

    Serial.println("Connectare la WiFi:");

   for (byte s=0; s<sizeof(ssid); s++) {

    Serial.println(""); Serial.print(s+1); Serial.print(". ");
    Serial.println(ssid[s]);

    WiFi.begin(ssid[s], password[s]);

  ts = millis();

    while((WiFi.status() != WL_CONNECTED) && ((millis() - ts) < 10000) ) {
        delay(500);
        Serial.print(".");
    }

  if(WiFi.status() == WL_CONNECTED ) {

    Serial.print("\nConectat la reteaua WiFi: ");
    Serial.println(ssid[s]);

    break;

  } // end if
 } // end for

/*    while(WiFi.status() != WL_CONNECTED) {
        delay(500);
        Serial.print(".");
    }
*/

} // end connectToWiFi



// Read DATE/TIME function

void adjustTime() {

//  configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
  configTime(GMT_Offset, daylightOffset, "europe.pool.ntp.org");

    if (getLocalTime(&timeinfo)){
     Serial.println( "NTP Server Connected OK, Date/Time adjusted" );
   }
/*
     ss = timeinfo.tm_sec;
     mm = timeinfo.tm_min;
     hh = timeinfo.tm_hour;
     wd = timeinfo.tm_wday; // The day of week.
     d = timeinfo.tm_mday;  // d day
     m = timeinfo.tm_mon + 1;  // m mounth
     y = timeinfo.tm_year + 1900;  // y year
*/
  } // end adjustTime


void ReadDateTime(void) {

//  Serial.println(getLocalTime("%Y-%m-%d %H:%M:%S"));   // (String) returns 2024-06-23 14:25:51 format
//   Serial.println(&timeinfo, "%A, %d %B %Y %H:%M:%S");

 //  Serial.println(&timeinfo, "%Y-%m-%d %H:%M:%S");

   char buffer [80];
   strftime (buffer,80,"%Y-%m-%d %H:%M:%S",&timeinfo);
   Serial.println(buffer);


//   Serial.println(&timeinfo, "%T");

    getLocalTime(&timeinfo);

     ss = timeinfo.tm_sec;
     mm = timeinfo.tm_min;
     hh = timeinfo.tm_hour;
     wd = timeinfo.tm_wday; // The day of week.
     d = timeinfo.tm_mday;  // d day
     m = timeinfo.tm_mon + 1;  // m mounth
     y = timeinfo.tm_year + 1900;  // y year
/*
  Serial.println(d);
  Serial.println(m);
  Serial.println(y);
  Serial.println(hh);
  Serial.println(mm);
  Serial.println(ss);
*/
 }//end ReadDateTime



  /*
format
C string containing any combination of regular characters and special format specifiers. These format specifiers are replaced by the function to the corresponding values to represent the time specified in timeptr. They all begin with a percentage (%) sign, and are:
specifier Replaced by Example
%a  Abbreviated weekday name *  Thu
%A  Full weekday name * Thursday
%b  Abbreviated month name *  Aug
%B  Full month name * August
%c  Date and time representation *  Thu Aug 23 14:55:02 2001
%C  Year divided by 100 and truncated to integer (00-99)  20
%d  Day of the month, zero-padded (01-31) 23
%D  Short MM/DD/YY date, equivalent to %m/%d/%y 08/23/01
%e  Day of the month, space-padded ( 1-31)  23
%F  Short YYYY-MM-DD date, equivalent to %Y-%m-%d 2001-08-23
%g  Week-based year, last two digits (00-99)  01
%G  Week-based year 2001
%h  Abbreviated month name * (same as %b) Aug
%H  Hour in 24h format (00-23)  14
%I  Hour in 12h format (01-12)  02
%j  Day of the year (001-366) 235
%m  Month as a decimal number (01-12) 08
%M  Minute (00-59)  55
%n  New-line character ('\n') 
%p  AM or PM designation  PM
%r  12-hour clock time *  02:55:02 pm
%R  24-hour HH:MM time, equivalent to %H:%M 14:55
%S  Second (00-61)  02
%t  Horizontal-tab character ('\t') 
%T  ISO 8601 time format (HH:MM:SS), equivalent to %H:%M:%S 14:55:02
%u  ISO 8601 weekday as number with Monday as 1 (1-7) 4
%U  Week number with the first Sunday as the first day of week one (00-53)  33
%V  ISO 8601 week number (01-53)  34
%w  Weekday as a decimal number with Sunday as 0 (0-6)  4
%W  Week number with the first Monday as the first day of week one (00-53)  34
%x  Date representation * 08/23/01
%X  Time representation * 14:55:02
%y  Year, last two digits (00-99) 01
%Y  Year  2001
%z  ISO 8601 offset from UTC in timezone (1 minute=1, 1 hour=100)
If timezone cannot be determined, no characters +100
%Z  Timezone name or abbreviation *
If timezone cannot be determined, no characters CDT
%%  A % sign  %
* The specifiers marked with an asterisk (*) are locale-dependent.
Note: Yellow rows indicate specifiers and sub-specifiers introduced by C99. Since C99, two locale-specific modifiers can also be inserted between the percentage sign (%) and the specifier proper to request an alternative format, where applicable:
Modifier  Meaning Applies to
E Uses the locale's alternative representation  %Ec %EC %Ex %EX %Ey %EY
O Uses the locale's alternative numeric symbols %Od %Oe %OH %OI %Om %OM %OS %Ou %OU %OV %Ow %OW %Oy


*/