// 0.0 Original az_delivery
// 0.1 LCD
// 0.2 RTC
// 0.3 RTC update @ 1:00


#include <LiquidCrystal_I2C.h> // Library for LCD
LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x3f, 20, 4);
#define STATUS_PIN LED_BUILTIN
#define DCF_PIN 2
#include <wire.h>
#include "RTClib.h" 
RTC_DS3231 rtc; 
int HIGH_Start = 0;
int HIGH_Ende = 0;
int HIGH_Zeit = 0;
int LOW_Start = 0;
int LOW_Ende = 0;
int LOW_Zeit = 0;
int ZONE = 0; 
int disp=0;

bool Signal = false;
bool neueMinute = false;
int BIT = -1;
int ZEIT[65];
int ZEIT_STUNDE;
int ZEIT_MINUTE;
int ZEIT_TAG;
int ZEIT_MONAT;
int ZEIT_JAHR;
int ZEIT_WOCHENTAG;
int PAR_STUNDE;
int PAR_MINUTE;
int PAR_BEGINN;
 
void setup() {
  lcd.init();
  lcd.backlight();
  lcd.clear();
  Serial.begin(115200);
  pinMode(DCF_PIN, INPUT);
  pinMode(STATUS_PIN, OUTPUT);
  Serial.println("Syncronisierung");
  lcd.setCursor(0, 0);
  lcd.print("SYNCRONISIERUNG");
}
 
void loop() {
  if (BIT > 60) {neueMinute = false;}
  int DCF_SIGNAL = digitalRead(DCF_PIN);
  
  if (DCF_SIGNAL == HIGH && Signal == false) {
    Signal = true; 
    HIGH_Start = millis(); 
    LOW_Ende = HIGH_Start;  
    LOW_Zeit = LOW_Ende - LOW_Start; 
    
    if (neueMinute == true) {
      PrintBeschreibung(BIT);
      //Serial.print("Bit"); 
      //Serial.print (BIT); 
      //Serial.print (": "); 
      ZEIT[BIT] = (BIT_Zeit(LOW_Zeit));
      Serial.print (ZEIT[BIT]);
      //Serial.println ();
    }
    else {
      Serial.print(".");
    }
  }
 
  if (DCF_SIGNAL == LOW && Signal == true) {
    Signal = false; 
    HIGH_Ende = millis();  
    LOW_Start = HIGH_Ende; 
    HIGH_Zeit = HIGH_Ende - HIGH_Start; 
 
    NEUMINUTE(LOW_Zeit);
  
  }
  
lcdausgabe();
}
// main-loop 


int BIT_Zeit (int LOW_Zeit) {
   if (LOW_Zeit >= 851 && LOW_Zeit <= 950) {return 0;} 
   if (LOW_Zeit >= 750 && LOW_Zeit <= 850) {return 1;}
   if (LOW_Zeit <= 350) {BIT-=1;return "";}
}

void NEUMINUTE (int LOW_Zeit) {
  if (LOW_Zeit >= 1700) {
    BIT = 0;
    neueMinute = true;
    ZEIT_STUNDE = ZEIT[29]*1+ZEIT[30]*2+ZEIT[31]*4+ZEIT[32]*8+ZEIT[33]*10+ZEIT[34]*20;
    ZEIT_MINUTE = ZEIT[21]*1+ZEIT[22]*2+ZEIT[23]*4+ZEIT[24]*8+ZEIT[25]*10+ZEIT[26]*20+ZEIT[27]*40;
    // Sekunde einbauen
    //ZEIT_SEKUNDE = ZEIT[21]*1+ZEIT[22]*2+ZEIT[23]*4+ZEIT[24]*8+ZEIT[25]*10+ZEIT[26]*20+ZEIT[27]*40;
    PAR_STUNDE = ZEIT[35];
    PAR_MINUTE = ZEIT[28];
    ZEIT_TAG = ZEIT[36]*1+ZEIT[37]*2+ZEIT[38]*4+ZEIT[39]*8+ZEIT[40]*10+ZEIT[41]*20;
    ZEIT_MONAT = ZEIT[45]*1+ZEIT[46]*2+ZEIT[47]*4+ZEIT[48]*8+ZEIT[49]*10;
    ZEIT_JAHR = 2000+ZEIT[50]*1+ZEIT[51]*2+ZEIT[52]*4+ZEIT[53]*8+ZEIT[54]*10+ZEIT[55]*20+ZEIT[56]*40+ZEIT[57]*80;
    PAR_BEGINN = ZEIT[20];
    ZEIT_WOCHENTAG = ZEIT[44]*4+ZEIT[43]*2+ZEIT[42]*1;
    rtc.adjust(DateTime((ZEIT_JAHR),(ZEIT_MONAT),(ZEIT_TAG),(ZEIT_STUNDE),(ZEIT_MINUTE), 0));
    DateTime now = rtc.now();

    Serial.println();
    Serial.println("*****************************");
    Serial.print ("Uhrzeit: ");
    Serial.println();
    Serial.print (ZEIT_STUNDE);
    Serial.print (":");
    Serial.print (ZEIT_MINUTE);
    Serial.println();
    Serial.println();
    Serial.print ("Datum: ");
    Serial.println();
    Serial.print (ZEIT_TAG);
    Serial.print (".");
    Serial.print (ZEIT_MONAT);
    Serial.print (".");
    Serial.print (ZEIT_JAHR);
    Serial.println();
    Serial.print ("WT");
    Serial.print (ZEIT_WOCHENTAG);
    Serial.print (ZEIT[44]);
    Serial.print (ZEIT[43]);
    Serial.print (ZEIT[42]);
    
    
    Serial.println("*****************************");
disp=1;
  lcd.clear();
  lcd.setCursor(0, 0); // Set the cursor on the first column and first row.
  if (ZEIT_STUNDE < 10) lcd.print(" ");
  lcd.print(ZEIT_STUNDE);  
  lcd.setCursor(2, 0); 
  lcd.print(":");
  lcd.setCursor(3, 0); 
  if (ZEIT_MINUTE < 10) lcd.print("0");
  lcd.print(ZEIT_MINUTE);
  lcd.setCursor(5, 0); 
  lcd.print("");
  //lcd.setCursor(6, 0); 
  
  //lcd.setCursor(0, 1);
  
  if ((ZEIT[17]==0) && (ZEIT[18]==1)) lcd.print (" MEZ");
  if ((ZEIT[17]==1) && (ZEIT[18]==0)) lcd.print (" MESZ");
  if ((ZEIT[17]==0) && (ZEIT[18]==0)) lcd.print (" No DCF" );
  lcd.setCursor(0, 1); 
  lcd.print(ZEIT_TAG);
  lcd.print(". ");
  lcd.setCursor(4, 1); 
  switch (ZEIT_MONAT) {
    case 1:lcd.print("Januar");break;
    case 2:lcd.print("Februar");break;
    case 3:lcd.print("März");break;
    case 4:lcd.print("April");break;
    case 5:lcd.print("Mai");break;
    case 6:lcd.print("Juni");break;
    case 7:lcd.print("Juli");break;
    case 8:lcd.print("August");break;
    case 9:lcd.print("September");break;
    case 10:lcd.print("Oktober");break;
    case 11:lcd.print("November");break;
    case 12:lcd.print("Dezember");break;
  }
  
  lcd.print(" ");
  //lcd.setCursor(6, 1); 
  lcd.print(ZEIT_JAHR);
  lcd.setCursor(10, 1);
  switch (ZEIT_WOCHENTAG) {
    case 1:lcd.print("Mon");break;
    case 2:lcd.print("Die");break;
    case 3:lcd.print("Mit");break;
    case 4:lcd.print("Don");break;
    case 5:lcd.print("Fre");break;
    case 6:lcd.print("Sam");break;
    case 7:lcd.print("Son");break;
   }
  lcd.setCursor(0, 2);
  lcd.print("RTC:");
  if (now.hour() < 10) lcd.print("0");
  lcd.print(now.hour(), DEC);
  lcd.print(":");
  if (now.minute() < 10) lcd.print("0");
  lcd.print(now.minute(), DEC);
  lcd.print(":");
  if (now.second() < 10) lcd.print("0");
  lcd.print(now.second(), DEC);
  lcd.setCursor(0, 3);
  switch (ZEIT_WOCHENTAG) {
    case 1:lcd.print("Mon");break;
    case 2:lcd.print("Die");break;
    case 3:lcd.print("Mit");break;
    case 4:lcd.print("Don");break;
    case 5:lcd.print("Fre");break;
    case 6:lcd.print("Sam");break;
    case 7:lcd.print("Son");break;
   }
  lcd.print(" ");
  lcd.print(now.day(), DEC);
  lcd.print(". ");
  lcd.print(now.month(), DEC);
  lcd.print("-");
  lcd.print(now.year(), DEC);
  //lcd.print(" dow:");
  
  //lcd.print(now.dayOfTheWeek());
 
  
  
  } else {BIT++;}
}
 
void lcdausgabe() {
lcd.clear();
  lcd.setCursor(0, 0); // Set the cursor on the first column and first row.
  if (ZEIT_STUNDE < 10) lcd.print(" ");
  lcd.print(ZEIT_STUNDE);  
  lcd.setCursor(2, 0); 
  lcd.print(":");
  lcd.setCursor(3, 0); 
  if (ZEIT_MINUTE < 10) lcd.print("0");
  lcd.print(ZEIT_MINUTE);
  lcd.setCursor(5, 0); 
  lcd.print("");
  //lcd.setCursor(6, 0); 
  
  //lcd.setCursor(0, 1);
  
  if ((ZEIT[17]==0) && (ZEIT[18]==1)) lcd.print (" MEZ");
  if ((ZEIT[17]==1) && (ZEIT[18]==0)) lcd.print (" MESZ");
  if ((ZEIT[17]==0) && (ZEIT[18]==0)) lcd.print (" No DCF" );
  lcd.setCursor(0, 1); 
  lcd.print(ZEIT_TAG);
  lcd.print(". ");
  lcd.setCursor(4, 1); 
  switch (ZEIT_MONAT) {
    case 1:lcd.print("Januar");break;
    case 2:lcd.print("Februar");break;
    case 3:lcd.print("März");break;
    case 4:lcd.print("April");break;
    case 5:lcd.print("Mai");break;
    case 6:lcd.print("Juni");break;
    case 7:lcd.print("Juli");break;
    case 8:lcd.print("August");break;
    case 9:lcd.print("September");break;
    case 10:lcd.print("Oktober");break;
    case 11:lcd.print("November");break;
    case 12:lcd.print("Dezember");break;
  }
  
  lcd.print(" ");
  //lcd.setCursor(6, 1); 
  lcd.print(ZEIT_JAHR);
  lcd.setCursor(10, 1);
  switch (ZEIT_WOCHENTAG) {
    case 1:lcd.print("Mon");break;
    case 2:lcd.print("Die");break;
    case 3:lcd.print("Mit");break;
    case 4:lcd.print("Don");break;
    case 5:lcd.print("Fre");break;
    case 6:lcd.print("Sam");break;
    case 7:lcd.print("Son");break;
   }
  lcd.setCursor(0, 2);
  lcd.print("RTC:");
  if (now.hour() < 10) lcd.print("0");
  lcd.print(now.hour(), DEC);
  lcd.print(":");
  if (now.minute() < 10) lcd.print("0");
  lcd.print(now.minute(), DEC);
  lcd.print(":");
  if (now.second() < 10) lcd.print("0");
  lcd.print(now.second(), DEC);
  lcd.setCursor(0, 3);
  switch (ZEIT_WOCHENTAG) {
    case 1:lcd.print("Mon");break;
    case 2:lcd.print("Die");break;
    case 3:lcd.print("Mit");break;
    case 4:lcd.print("Don");break;
    case 5:lcd.print("Fre");break;
    case 6:lcd.print("Sam");break;
    case 7:lcd.print("Son");break;
   }
  lcd.print(" ");
  lcd.print(now.day(), DEC);
  lcd.print(". ");
  lcd.print(now.month(), DEC);
  lcd.print("-");
  lcd.print(now.year(), DEC);
}
void PrintBeschreibung(int BitNummer) {
  switch (BitNummer) {
    case  0: Serial.println("\n# START MINUTE (IMMER 0)"); break;
    case  1: Serial.println("\n# WETTERDATEN"); break;
    case 15: Serial.println("\n# RUFBIT"); break;
    case 16: Serial.println("\n# MEZ/MESZ"); break;
    case 17: Serial.println("\n# MESZ"); ZONE = 2; break;
    case 18: Serial.println("\n# MEZ"); ZONE = 1;break;
    case 19: Serial.println("\n# SCHALTSEKUNDE"); break;
    case 20: Serial.println("\n# BEGIN ZEITINFORMATION (IMMER 1)"); break;
    case 21: Serial.println("\n# MINUTEN"); break;
    case 28: Serial.println("\n# PARITAET MINUTE"); break;
    case 29: Serial.println("\n# STUNDE");break;
    case 35: Serial.println("\n# PARITAET STUNDE"); break;
    case 36: Serial.println("\n# TAG"); break;
    case 42: Serial.println("\n# WOCHENTAG"); break;
    case 45: Serial.println("\n# MONAT"); break;
    case 50: Serial.println("\n# JAHR"); break;
    case 58: Serial.println("\n# PARITAET DATUM"); break;
  }
}