#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h>
#endif
#define PIN 2       // Hier wird angegeben, an welchem digitalen Pin die WS2812 LEDs bzw. NeoPixel angeschlossen sind
#define NUM_LEDS 36     // Hier wird die Anzahl der angeschlossenen WS2812 LEDs bzw. NeoPixel angegeben
#define BRIGHTNESS 10     // Hier wird die Helligkeit aller LEDs eingegeben
Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, PIN, NEO_GRBW + NEO_KHZ800);

#include "Wire.h"
#define DS3231_ADDRESSE 0x68   // SCL an analoger Eingang A5 - SDA an analoger Eingang A4

int merker1=100;
int merker2=100;
int merker3=100;
int merker4=100;
int merker5=200;

int tasterminute=3;       // Digital IO 3 für den Taster Minute
int tasterstatusm = 0;
int tasterstunde=4;       // Didital IO 4 für den Taster Stunde
int tasterstatush = 0;

int sek1=0; int sek2=0; int sek3=0; int sek4=255;       // Farbe sekunde
int stu51=255; int stu52=0; int stu53=0; int stu54=0;   // Farbe 5er Stunde
int stu11=255; int stu12=0; int stu13=0; int stu14=0;   // Farbe 1er Stunde
int min51=0; int min52=0; int min53=0; int min54=255;   // Farbe 5er Minute
int min55=255; int min56=0; int min57=0; int min58=0;   // Farbe 15er Minute
int min11=0; int min12=0; int min13=0; int min14=255;   // Farbe 1er Minute


void setup() {
strip.setBrightness(BRIGHTNESS);
strip.begin();
strip.show(); // Initialize all strip to 'off'
Serial.begin(9600);
Wire.begin();
pinMode(tasterminute, INPUT);
pinMode(tasterstunde, INPUT);
}

void loop() {
  BerlinUhr();
  }

void leseDS3231zeit(byte *sekunde, byte *minute,byte *stunde, byte *wochentag, byte *tag, byte *monat, byte *jahr) {
  Wire.beginTransmission(DS3231_ADDRESSE);
  Wire.write(0); // DS3231 Register zu 00h
  Wire.endTransmission();
  Wire.requestFrom(DS3231_ADDRESSE, 7);
  *sekunde = bcdToDec(Wire.read() & 0x7f);
  *minute = bcdToDec(Wire.read());
  *stunde = bcdToDec(Wire.read() & 0x3f);
  *wochentag = bcdToDec(Wire.read());
  *tag = bcdToDec(Wire.read());
  *monat = bcdToDec(Wire.read());
  *jahr = bcdToDec(Wire.read());
 
}
void BerlinUhr(){
byte sekunde, minute, stunde, wochentag, tag, monat, jahr;
  leseDS3231zeit(&sekunde, &minute, &stunde, &wochentag, &tag, &monat, &jahr);

//  sekunde=0;
//  minute=59;
//  stunde=23;
  
if (sekunde %2 == 0)
{
strip.setPixelColor(35, strip.Color(sek1,sek2,sek3, sek4)); strip.show(); 
} 
else {
strip.setPixelColor(35, strip.Color(0,0,0)); strip.show(); 
}
if (minute != merker1)
{ 
Serial.println(minute);
if ((minute == 1) || (minute== 6) || (minute== 11) || (minute== 16) || (minute== 21) || (minute== 26) || (minute== 31) || (minute== 36) || (minute== 41) || (minute== 46) || (minute== 51) || (minute== 56))
{ 
strip.setPixelColor(0, strip.Color(min11,min12,min13, min14));
strip.setPixelColor(1, strip.Color(min11,min12,min13, min14)); strip.show();
}
if ((minute == 2) || (minute== 7) || (minute== 12) || (minute== 17) || (minute== 22) || (minute== 27) || (minute== 32) || (minute== 37) || (minute== 42) || (minute== 47) || (minute== 52) || (minute== 57))
{ 
strip.setPixelColor(0, strip.Color(min11,min12,min13, min14));
strip.setPixelColor(1, strip.Color(min11,min12,min13, min14));
strip.setPixelColor(2, strip.Color(min11,min12,min13, min14));
strip.setPixelColor(3, strip.Color(min11,min12,min13, min14)); strip.show();
}
if ((minute == 3) || (minute== 8) || (minute== 13) || (minute== 18) || (minute== 23) || (minute== 28) || (minute== 33) || (minute== 38) || (minute== 43) || (minute== 48) || (minute== 53) || (minute== 58))
{ 
strip.setPixelColor(0, strip.Color(min11,min12,min13, min14));
strip.setPixelColor(1, strip.Color(min11,min12,min13, min14));
strip.setPixelColor(2, strip.Color(min11,min12,min13, min14));
strip.setPixelColor(3, strip.Color(min11,min12,min13, min14));
strip.setPixelColor(4, strip.Color(min11,min12,min13, min14));
strip.setPixelColor(5, strip.Color(min11,min12,min13, min14)); strip.show();
}
if ((minute == 4) || (minute== 9) || (minute== 14) || (minute== 19) || (minute== 24) || (minute== 29) || (minute== 34) || (minute== 39) || (minute== 44) || (minute== 49) || (minute== 54) || (minute== 59))
{ 
strip.setPixelColor(0, strip.Color(min11,min12,min13, min14));
strip.setPixelColor(1, strip.Color(min11,min12,min13, min14));
strip.setPixelColor(2, strip.Color(min11,min12,min13, min14));
strip.setPixelColor(3, strip.Color(min11,min12,min13, min14));
strip.setPixelColor(4, strip.Color(min11,min12,min13, min14));
strip.setPixelColor(5, strip.Color(min11,min12,min13, min14));
strip.setPixelColor(6, strip.Color(min11,min12,min13, min14));
strip.setPixelColor(7, strip.Color(min11,min12,min13, min14)); strip.show();
}
if ((minute == 0) || (minute== 5)|| (minute== 10) || (minute== 15) || (minute== 20) || (minute== 25) || (minute== 30) || (minute== 35) || (minute== 40) || (minute== 45) || (minute== 50) || (minute== 55))
{ 
strip.setPixelColor(0, strip.Color(0,0,0));
strip.setPixelColor(1, strip.Color(0,0,0));
strip.setPixelColor(2, strip.Color(0,0,0));
strip.setPixelColor(3, strip.Color(0,0,0));
strip.setPixelColor(4, strip.Color(0,0,0));
strip.setPixelColor(5, strip.Color(0,0,0));
strip.setPixelColor(6, strip.Color(0,0,0));
strip.setPixelColor(7, strip.Color(0,0,0)); strip.show();
}
merker1 = minute;
}
if (minute != merker2)
{
if ((minute >=5) and (minute <=9))
{
strip.setPixelColor(8, strip.Color(min51,min52,min53, min54)); strip.show();
}
if ((minute >=10) and (minute <=14))
{
strip.setPixelColor(8, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(9, strip.Color(min51,min52,min53, min54)); strip.show();
}
if ((minute >=15) and (minute <=19))
{
strip.setPixelColor(8, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(9, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(10, strip.Color(min55,min56,min57, min58)); strip.show();
}
if ((minute >=20) and (minute <=24))
{
strip.setPixelColor(8, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(9, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(10, strip.Color(min55,min56,min57, min58));
strip.setPixelColor(11, strip.Color(min51,min52,min53, min54)); strip.show();
}
if ((minute >=25) and (minute <=29))
{
strip.setPixelColor(8, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(9, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(10, strip.Color(min55,min56,min57, min58));
strip.setPixelColor(11, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(12, strip.Color(min51,min52,min53, min54)); strip.show();
}
if ((minute >=30) and (minute <=34))
{
strip.setPixelColor(8, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(9, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(10, strip.Color(min55,min56,min57, min58));
strip.setPixelColor(11, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(12, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(13, strip.Color(min55,min56,min57, min58)); strip.show();
}
if ((minute >=35) and (minute <=39))
{
strip.setPixelColor(8, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(9, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(10, strip.Color(min55,min56,min57, min58));
strip.setPixelColor(11, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(12, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(13, strip.Color(min55,min56,min57, min58));
strip.setPixelColor(14, strip.Color(min51,min52,min53, min54)); strip.show();
}
if ((minute >=40) and (minute <=44))
{
strip.setPixelColor(8, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(9, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(10, strip.Color(min55,min56,min57, min58));
strip.setPixelColor(11, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(12, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(13, strip.Color(min55,min56,min57, min58));
strip.setPixelColor(14, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(15, strip.Color(min51,min52,min53, min54)); strip.show();
}
if ((minute >=45) and (minute <=49))
{
strip.setPixelColor(8, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(9, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(10, strip.Color(min55,min56,min57, min58));
strip.setPixelColor(11, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(12, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(13, strip.Color(min55,min56,min57, min58));
strip.setPixelColor(14, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(15, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(16, strip.Color(min55,min56,min57, min58)); strip.show();
}
if ((minute >=50) and (minute <=54))
{
strip.setPixelColor(8, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(9, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(10, strip.Color(min55,min56,min57, min58));
strip.setPixelColor(11, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(12, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(13, strip.Color(min55,min56,min57, min58));
strip.setPixelColor(14, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(15, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(16, strip.Color(min55,min56,min57, min58));
strip.setPixelColor(17, strip.Color(min51,min52,min53, min54)); strip.show();
}
if ((minute >=55) and (minute <=59))
{
strip.setPixelColor(8, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(9, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(10, strip.Color(min55,min56,min57, min58));
strip.setPixelColor(11, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(12, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(13, strip.Color(min55,min56,min57, min58));
strip.setPixelColor(14, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(15, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(16, strip.Color(min55,min56,min57, min58));
strip.setPixelColor(17, strip.Color(min51,min52,min53, min54));
strip.setPixelColor(18, strip.Color(min51,min52,min53, min54)); strip.show();
}
if (minute ==0)
{
strip.setPixelColor(8, strip.Color(0,0,0));
strip.setPixelColor(9, strip.Color(0,0,0));
strip.setPixelColor(10, strip.Color(0,0,0));
strip.setPixelColor(11, strip.Color(0,0,0));
strip.setPixelColor(12, strip.Color(0,0,0));
strip.setPixelColor(13, strip.Color(0,0,0));
strip.setPixelColor(14, strip.Color(0,0,0));
strip.setPixelColor(15, strip.Color(0,0,0));
strip.setPixelColor(16, strip.Color(0,0,0));
strip.setPixelColor(17, strip.Color(0,0,0));
strip.setPixelColor(18, strip.Color(0,0,0)); strip.show();
}
}
if (stunde != merker3)
{
if ((stunde == 1) || (stunde == 6) || (stunde == 11) || (stunde == 16) || (stunde == 21))
{ 
strip.setPixelColor(19, strip.Color(stu11,stu12,stu13, stu14));
strip.setPixelColor(20, strip.Color(stu11,stu12,stu13, stu14)); strip.show();
}
if ((stunde == 2) || (stunde == 7) || (stunde == 12) || (stunde == 17) || (stunde == 22))
{ 

strip.setPixelColor(19, strip.Color(stu11,stu12,stu13, stu14));
strip.setPixelColor(20, strip.Color(stu11,stu12,stu13, stu14));
strip.setPixelColor(21, strip.Color(stu11,stu12,stu13, stu14));
strip.setPixelColor(22, strip.Color(stu11,stu12,stu13, stu14)); strip.show();
}
if ((stunde == 3) || (stunde == 8) || (stunde == 13) || (stunde == 18) || (stunde == 23))
{ 
strip.setPixelColor(19, strip.Color(stu11,stu12,stu13, stu14));
strip.setPixelColor(20, strip.Color(stu11,stu12,stu13, stu14));
strip.setPixelColor(21, strip.Color(stu11,stu12,stu13, stu14));
strip.setPixelColor(22, strip.Color(stu11,stu12,stu13, stu14));
strip.setPixelColor(23, strip.Color(stu11,stu12,stu13, stu14));
strip.setPixelColor(24, strip.Color(stu11,stu12,stu13, stu14)); strip.show();
}
if ((stunde == 4) || (stunde == 9) || (stunde == 14) || (stunde == 19) || ((stunde == 0) and (minute ==0)))
{ 
strip.setPixelColor(19, strip.Color(stu11,stu12,stu13, stu14));
strip.setPixelColor(20, strip.Color(stu11,stu12,stu13, stu14));
strip.setPixelColor(21, strip.Color(stu11,stu12,stu13, stu14));
strip.setPixelColor(22, strip.Color(stu11,stu12,stu13, stu14));
strip.setPixelColor(23, strip.Color(stu11,stu12,stu13, stu14));
strip.setPixelColor(24, strip.Color(stu11,stu12,stu13, stu14));
strip.setPixelColor(25, strip.Color(stu11,stu12,stu13, stu14));
strip.setPixelColor(26, strip.Color(stu11,stu12,stu13, stu14)); strip.show();
}
if (((stunde == 0) and (minute >=1)) || (stunde == 5) || (stunde == 10) || (stunde == 15) || (stunde == 20))
{ 
strip.setPixelColor(19, strip.Color(0,0,0));
strip.setPixelColor(20, strip.Color(0,0,0));
strip.setPixelColor(21, strip.Color(0,0,0));
strip.setPixelColor(22, strip.Color(0,0,0));
strip.setPixelColor(23, strip.Color(0,0,0));
strip.setPixelColor(24, strip.Color(0,0,0));
strip.setPixelColor(25, strip.Color(0,0,0));
strip.setPixelColor(26, strip.Color(0,0,0)); strip.show();
}
}
if (stunde != merker4)
{
if ((stunde >=5) and (stunde <=9))
{
strip.setPixelColor(27, strip.Color(stu51,stu52,stu53, stu54));
strip.setPixelColor(28, strip.Color(stu51,stu52,stu53, stu54)); strip.show();
}
if ((stunde >=10) and (stunde <=14))
{
strip.setPixelColor(27, strip.Color(stu51,stu52,stu53, stu54));
strip.setPixelColor(28, strip.Color(stu51,stu52,stu53, stu54));
strip.setPixelColor(29, strip.Color(stu51,stu52,stu53, stu54));
strip.setPixelColor(30, strip.Color(stu51,stu52,stu53, stu54)); strip.show();
}
if ((stunde >=15) and (stunde <=19))
{
strip.setPixelColor(27, strip.Color(stu51,stu52,stu53, stu54));
strip.setPixelColor(28, strip.Color(stu51,stu52,stu53, stu54));
strip.setPixelColor(29, strip.Color(stu51,stu52,stu53, stu54));
strip.setPixelColor(30, strip.Color(stu51,stu52,stu53, stu54));
strip.setPixelColor(31, strip.Color(stu51,stu52,stu53, stu54));
strip.setPixelColor(32, strip.Color(stu51,stu52,stu53, stu54)); strip.show();
}
if (((stunde >=20) and (stunde <=24)) or ((stunde ==0) and (minute ==0)))
{
strip.setPixelColor(27, strip.Color(stu51,stu52,stu53, stu54));
strip.setPixelColor(28, strip.Color(stu51,stu52,stu53, stu54));
strip.setPixelColor(29, strip.Color(stu51,stu52,stu53, stu54));
strip.setPixelColor(30, strip.Color(stu51,stu52,stu53, stu54));
strip.setPixelColor(31, strip.Color(stu51,stu52,stu53, stu54));
strip.setPixelColor(32, strip.Color(stu51,stu52,stu53, stu54));
strip.setPixelColor(33, strip.Color(stu51,stu52,stu53, stu54));
strip.setPixelColor(34, strip.Color(stu51,stu52,stu53, stu54)); strip.show();
}
if ((stunde == 0) and (minute >=1))
{
strip.setPixelColor(27, strip.Color(0,0,0));
strip.setPixelColor(28, strip.Color(0,0,0));
strip.setPixelColor(29, strip.Color(0,0,0));
strip.setPixelColor(30, strip.Color(0,0,0));
strip.setPixelColor(31, strip.Color(0,0,0));
strip.setPixelColor(32, strip.Color(0,0,0));
strip.setPixelColor(33, strip.Color(0,0,0));
strip.setPixelColor(34, strip.Color(0,0,0)); strip.show();
}
}
tasterstatusm=digitalRead(tasterminute);
if (tasterstatusm == HIGH)
{
minute = minute + 1;
sekunde = 1;
if (minute == 60) minute = 0;
  Wire.beginTransmission(DS3231_ADDRESSE);
  Wire.write(0);
  Wire.write(decToBcd(sekunde));
  Wire.write(decToBcd(minute));
  Wire.write(decToBcd(stunde));
  Wire.write(decToBcd(wochentag));
  Wire.write(decToBcd(tag));
  Wire.write(decToBcd(monat));
  Wire.write(decToBcd(jahr));
  Wire.endTransmission();
  delay (200);
}

tasterstatush=digitalRead(tasterstunde);
if (tasterstatush == HIGH)
{
stunde = stunde + 1;
if (stunde >= 24) stunde = 0;
  Wire.beginTransmission(DS3231_ADDRESSE);
  Wire.write(0);
  Wire.write(decToBcd(sekunde));
  Wire.write(decToBcd(minute));
  Wire.write(decToBcd(stunde));
  Wire.write(decToBcd(wochentag));
  Wire.write(decToBcd(tag));
  Wire.write(decToBcd(monat));
  Wire.write(decToBcd(jahr));
  Wire.endTransmission();
  delay (200);
}
}
byte decToBcd(byte val) {
// Dezimal Zahl zu binary coded decimal (BCD) umwandeln
  return((val/10*16) + (val%10));
}
byte bcdToDec(byte val) {
// BCD (binary coded decimal) in Dezimal Zahl umwandeln
  return((val/16*10) + (val%16));
}