Retro Uhr mit ESP, RTC und LED-Matrix

Hallo zusammen,

Uhren hatten wir schon einige in unserem Blog, ob Funkuhr oder über das NTP-Protokoll, mit Display oder unserem U64-Panel. Heute möchte ich Ihnen ein Variante mit ESP, RTC und LED-Matrix vorstellen. Freundlicherweise hat mich ein jüngerer Kollege darauf hingewiesen, dass diese Art von Uhren schon lange überholt seien und mir damit bewusst gemacht, dass ich mittlerweile.... naja, sagen wir mal nichtmehr zu den jüngeren Bastlern zähle und mich gebeten "Retro" in den Titel zu setzten.

Für unser Vorhaben brauchen wir:

• ESP8266-Amica-Modul
• RTC3231
• LED-Matrix

Dieses Projekt haben wir auf GitHub gefunden und hier für unsere Zwecke angepasst.

Bevor wir starten empfehle ich die Uhrzeit der RTC mit einem Arduino zu setzten, da dies mit den ESPs manchmal Probleme bereiten kann. Das haben wir in unserem kostenfreien E-Book zur RTC ausführlich erklärt.

Uns gefällt dieses Projekt sehr gut, da auch das Datum angeizeigt wird und der Effekt der wechselnden Uhrzeit toll umgesetzt wurde.

Die Verkabelung:

Hier der Code:

//*********************************************************************************************************
//*    ESP8266 MatrixClock                                                                                  *
//*********************************************************************************************************
//
// first release on 26.02.2017
// updated on    26.03.2019
// Version 1.2.1
//
//
// THE SOFTWARE IS PROVIDED "AS IS" FOR PRIVATE USE ONLY, IT IS NOT FOR COMMERCIAL USE IN WHOLE OR PART OR CONCEPT.
// FOR PERSONAL USE IT IS SUPPLIED 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 AUTHOR
// OR COPYRIGHT HOLDER 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
//Made from https://github.com/schreibfaul1/ESP8266-LED-Matrix-Clock
//Edited by AZ-Delivery

#include <SPI.h>
#include <Ticker.h>
#include <ESP8266WiFi.h>
#include <Wire.h>
#include <time.h>

#define SDA        5      // Pin sda (I2C)
#define SCL        4      // Pin scl (I2C)
#define CS         15     // Pin cs  (SPI)
#define anzMAX     4      // Anzahl der kaskadierten Module


unsigned short maxPosX = anzMAX * 8 - 1;            //calculated maxposition
unsigned short LEDarr[anzMAX][8];                   //character matrix to display (40*8)
unsigned short helpArrMAX[anzMAX * 8];              //helperarray for chardecoding
unsigned short helpArrPos[anzMAX * 8];              //helperarray pos of chardecoding
unsigned int z_PosX = 0;                            //xPosition im Display für Zeitanzeige
unsigned int d_PosX = 0;                            //xPosition im Display f�r Datumanzeige
bool f_tckr1s = false;
bool f_tckr50ms = false;
bool f_tckr24h = false;
unsigned long epoch = 0;


//Variablen für RTC DS3231
const unsigned char DS3231_ADDRESS = 0x68;
const unsigned char secondREG = 0x00;
const unsigned char minuteREG = 0x01;
const unsigned char hourREG = 0x02;
const unsigned char WTREG = 0x03;                   //weekday
const unsigned char dateREG = 0x04;
const unsigned char monthREG = 0x05;
const unsigned char yearREG = 0x06;
const unsigned char alarm_min1secREG = 0x07;
const unsigned char alarm_min1minREG = 0x08;
const unsigned char alarm_min1hrREG = 0x09;
const unsigned char alarm_min1dateREG = 0x0A;
const unsigned char alarm_min2minREG = 0x0B;
const unsigned char alarm_min2hrREG = 0x0C;
const unsigned char alarm_min2dateREG = 0x0D;
const unsigned char controlREG = 0x0E;
const unsigned char statusREG = 0x0F;
const unsigned char ageoffsetREG = 0x10;
const unsigned char tempMSBREG = 0x11;
const unsigned char tempLSBREG = 0x12;
const unsigned char _24_hour_format = 0;
const unsigned char _12_hour_format = 1;
const unsigned char AM = 0;
const unsigned char PM = 1;

struct DateTime {
    unsigned short sek1, sek2, sek12, min1, min2, min12, std1, std2, std12;
    unsigned short tag1, tag2, tag12, mon1, mon2, mon12, jahr1, jahr2, jahr12, WT;
} MEZ;


// The object for the Ticker
Ticker tckr;



//months
char M_arr[12][5] = { { '.', 'J', 'a', 'n', '.' }, { '.', 'F', 'e', 'b', '.' },
        { '.', 'M', 'a', 'r', '.' }, { '.', 'A', 'p', 'r', '.' }, { '.', 'M', 'a',
                'y', ' ' }, { '.', 'J', 'u', 'n', 'e' }, { '.', 'J', 'u', 'l', 'y' }, {
                '.', 'A', 'u', 'g', '.' }, { '.', 'S', 'e', 'p', 't' }, { '.', 'O', 'c',
                't', '.' }, { '.', 'N', 'o', 'v', '.' }, { '.', 'D', 'e', 'c', '.' } };
//days
char WT_arr[7][4] = { { 'S', 'u', 'n', ',' }, { 'M', 'o', 'n', ',' }, { 'T', 'u', 'e', ',' }, {
        'W', 'e', 'd', ',' }, { 'T', 'h', 'u', ',' }, { 'F', 'r', 'i', ',' }, { 'S', 'a', 't', ',' } };

// Zeichensatz 5x8 in einer 8x8 Matrix, 0,0 ist rechts oben
unsigned short const font1[96][9] = { { 0x07, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00 },   // 0x20, Space
        { 0x07, 0x04, 0x04, 0x04, 0x04, 0x04, 0x00, 0x04, 0x00 },   // 0x21, !
        { 0x07, 0x09, 0x09, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00 },   // 0x22, "
        { 0x07, 0x0a, 0x0a, 0x1f, 0x0a, 0x1f, 0x0a, 0x0a, 0x00 },   // 0x23, #
        { 0x07, 0x04, 0x0f, 0x14, 0x0e, 0x05, 0x1e, 0x04, 0x00 },   // 0x24, $
        { 0x07, 0x19, 0x19, 0x02, 0x04, 0x08, 0x13, 0x13, 0x00 },   // 0x25, %
        { 0x07, 0x04, 0x0a, 0x0a, 0x0a, 0x15, 0x12, 0x0d, 0x00 },   // 0x26, &
        { 0x07, 0x04, 0x04, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00 },   // 0x27, '
        { 0x07, 0x02, 0x04, 0x08, 0x08, 0x08, 0x04, 0x02, 0x00 },   // 0x28, (
        { 0x07, 0x08, 0x04, 0x02, 0x02, 0x02, 0x04, 0x08, 0x00 },   // 0x29, )
        { 0x07, 0x04, 0x15, 0x0e, 0x1f, 0x0e, 0x15, 0x04, 0x00 },   // 0x2a, *
        { 0x07, 0x00, 0x04, 0x04, 0x1f, 0x04, 0x04, 0x00, 0x00 },   // 0x2b, +
        { 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x02 },   // 0x2c, ,
        { 0x07, 0x00, 0x00, 0x00, 0x1f, 0x00, 0x00, 0x00, 0x00 },   // 0x2d, -
        { 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x03, 0x00 },   // 0x2e, .
        { 0x07, 0x01, 0x01, 0x02, 0x04, 0x08, 0x10, 0x10, 0x00 },   // 0x2f, /
        { 0x07, 0x0e, 0x11, 0x13, 0x15, 0x19, 0x11, 0x0e, 0x00 },   // 0x30, 0
        { 0x07, 0x04, 0x0c, 0x04, 0x04, 0x04, 0x04, 0x0e, 0x00 },   // 0x31, 1
        { 0x07, 0x0e, 0x11, 0x01, 0x02, 0x04, 0x08, 0x1f, 0x00 },   // 0x32, 2
        { 0x07, 0x0e, 0x11, 0x01, 0x06, 0x01, 0x11, 0x0e, 0x00 },   // 0x33, 3
        { 0x07, 0x02, 0x06, 0x0a, 0x12, 0x1f, 0x02, 0x02, 0x00 },   // 0x34, 4
        { 0x07, 0x1f, 0x10, 0x1e, 0x01, 0x01, 0x11, 0x0e, 0x00 },   // 0x35, 5
        { 0x07, 0x06, 0x08, 0x10, 0x1e, 0x11, 0x11, 0x0e, 0x00 },   // 0x36, 6
        { 0x07, 0x1f, 0x01, 0x02, 0x04, 0x08, 0x08, 0x08, 0x00 },   // 0x37, 7
        { 0x07, 0x0e, 0x11, 0x11, 0x0e, 0x11, 0x11, 0x0e, 0x00 },   // 0x38, 8
        { 0x07, 0x0e, 0x11, 0x11, 0x0f, 0x01, 0x02, 0x0c, 0x00 },   // 0x39, 9
        { 0x04, 0x00, 0x03, 0x03, 0x00, 0x03, 0x03, 0x00, 0x00 },   // 0x3a, :
        { 0x07, 0x00, 0x0c, 0x0c, 0x00, 0x0c, 0x04, 0x08, 0x00 },   // 0x3b, ;
        { 0x07, 0x02, 0x04, 0x08, 0x10, 0x08, 0x04, 0x02, 0x00 },   // 0x3c, <
        { 0x07, 0x00, 0x00, 0x1f, 0x00, 0x1f, 0x00, 0x00, 0x00 },   // 0x3d, =
        { 0x07, 0x08, 0x04, 0x02, 0x01, 0x02, 0x04, 0x08, 0x00 },   // 0x3e, >
        { 0x07, 0x0e, 0x11, 0x01, 0x02, 0x04, 0x00, 0x04, 0x00 },   // 0x3f, ?
        { 0x07, 0x0e, 0x11, 0x17, 0x15, 0x17, 0x10, 0x0f, 0x00 },   // 0x40, @
        { 0x07, 0x04, 0x0a, 0x11, 0x11, 0x1f, 0x11, 0x11, 0x00 },   // 0x41, A
        { 0x07, 0x1e, 0x11, 0x11, 0x1e, 0x11, 0x11, 0x1e, 0x00 },   // 0x42, B
        { 0x07, 0x0e, 0x11, 0x10, 0x10, 0x10, 0x11, 0x0e, 0x00 },   // 0x43, C
        { 0x07, 0x1e, 0x09, 0x09, 0x09, 0x09, 0x09, 0x1e, 0x00 },   // 0x44, D
        { 0x07, 0x1f, 0x10, 0x10, 0x1c, 0x10, 0x10, 0x1f, 0x00 },   // 0x45, E
        { 0x07, 0x1f, 0x10, 0x10, 0x1f, 0x10, 0x10, 0x10, 0x00 },   // 0x46, F
        { 0x07, 0x0e, 0x11, 0x10, 0x10, 0x13, 0x11, 0x0f, 0x00 },   // 0x37, G
        { 0x07, 0x11, 0x11, 0x11, 0x1f, 0x11, 0x11, 0x11, 0x00 },   // 0x48, H
        { 0x07, 0x0e, 0x04, 0x04, 0x04, 0x04, 0x04, 0x0e, 0x00 },   // 0x49, I
        { 0x07, 0x1f, 0x02, 0x02, 0x02, 0x02, 0x12, 0x0c, 0x00 },   // 0x4a, J
        { 0x07, 0x11, 0x12, 0x14, 0x18, 0x14, 0x12, 0x11, 0x00 },   // 0x4b, K
        { 0x07, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x1f, 0x00 },   // 0x4c, L
        { 0x07, 0x11, 0x1b, 0x15, 0x11, 0x11, 0x11, 0x11, 0x00 },   // 0x4d, M
        { 0x07, 0x11, 0x11, 0x19, 0x15, 0x13, 0x11, 0x11, 0x00 },   // 0x4e, N
        { 0x07, 0x0e, 0x11, 0x11, 0x11, 0x11, 0x11, 0x0e, 0x00 },   // 0x4f, O
        { 0x07, 0x1e, 0x11, 0x11, 0x1e, 0x10, 0x10, 0x10, 0x00 },   // 0x50, P
        { 0x07, 0x0e, 0x11, 0x11, 0x11, 0x15, 0x12, 0x0d, 0x00 },   // 0x51, Q
        { 0x07, 0x1e, 0x11, 0x11, 0x1e, 0x14, 0x12, 0x11, 0x00 },   // 0x52, R
        { 0x07, 0x0e, 0x11, 0x10, 0x0e, 0x01, 0x11, 0x0e, 0x00 },   // 0x53, S
        { 0x07, 0x1f, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x00 },   // 0x54, T
        { 0x07, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x0e, 0x00 },   // 0x55, U
        { 0x07, 0x11, 0x11, 0x11, 0x11, 0x11, 0x0a, 0x04, 0x00 },   // 0x56, V
        { 0x07, 0x11, 0x11, 0x11, 0x15, 0x15, 0x1b, 0x11, 0x00 },   // 0x57, W
        { 0x07, 0x11, 0x11, 0x0a, 0x04, 0x0a, 0x11, 0x11, 0x00 },   // 0x58, X
        { 0x07, 0x11, 0x11, 0x0a, 0x04, 0x04, 0x04, 0x04, 0x00 },   // 0x59, Y
        { 0x07, 0x1f, 0x01, 0x02, 0x04, 0x08, 0x10, 0x1f, 0x00 },   // 0x5a, Z
        { 0x07, 0x0e, 0x08, 0x08, 0x08, 0x08, 0x08, 0x0e, 0x00 },   // 0x5b, [
        { 0x07, 0x10, 0x10, 0x08, 0x04, 0x02, 0x01, 0x01, 0x00 },   // 0x5c, '\'
        { 0x07, 0x0e, 0x02, 0x02, 0x02, 0x02, 0x02, 0x0e, 0x00 },   // 0x5d, ]
        { 0x07, 0x04, 0x0a, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00 },   // 0x5e, ^
        { 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0x00 },   // 0x5f, _
        { 0x07, 0x04, 0x04, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00 },   // 0x60, `
        { 0x07, 0x00, 0x0e, 0x01, 0x0d, 0x13, 0x13, 0x0d, 0x00 },   // 0x61, a
        { 0x07, 0x10, 0x10, 0x10, 0x1c, 0x12, 0x12, 0x1c, 0x00 },   // 0x62, b
        { 0x07, 0x00, 0x00, 0x00, 0x0e, 0x10, 0x10, 0x0e, 0x00 },   // 0x63, c
        { 0x07, 0x01, 0x01, 0x01, 0x07, 0x09, 0x09, 0x07, 0x00 },   // 0x64, d
        { 0x07, 0x00, 0x00, 0x0e, 0x11, 0x1f, 0x10, 0x0f, 0x00 },   // 0x65, e
        { 0x07, 0x06, 0x09, 0x08, 0x1c, 0x08, 0x08, 0x08, 0x00 },   // 0x66, f
        { 0x07, 0x00, 0x0e, 0x11, 0x13, 0x0d, 0x01, 0x01, 0x0e },   // 0x67, g
        { 0x07, 0x10, 0x10, 0x10, 0x16, 0x19, 0x11, 0x11, 0x00 },   // 0x68, h
        { 0x05, 0x00, 0x02, 0x00, 0x06, 0x02, 0x02, 0x07, 0x00 },   // 0x69, i
        { 0x07, 0x00, 0x02, 0x00, 0x06, 0x02, 0x02, 0x12, 0x0c },   // 0x6a, j
        { 0x07, 0x10, 0x10, 0x12, 0x14, 0x18, 0x14, 0x12, 0x00 },   // 0x6b, k
        { 0x05, 0x06, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x00 },   // 0x6c, l
        { 0x07, 0x00, 0x00, 0x0a, 0x15, 0x15, 0x11, 0x11, 0x00 },   // 0x6d, m
        { 0x07, 0x00, 0x00, 0x16, 0x19, 0x11, 0x11, 0x11, 0x00 },   // 0x6e, n
        { 0x07, 0x00, 0x00, 0x0e, 0x11, 0x11, 0x11, 0x0e, 0x00 },   // 0x6f, o
        { 0x07, 0x00, 0x00, 0x1c, 0x12, 0x12, 0x1c, 0x10, 0x10 },   // 0x70, p
        { 0x07, 0x00, 0x00, 0x07, 0x09, 0x09, 0x07, 0x01, 0x01 },   // 0x71, q
        { 0x07, 0x00, 0x00, 0x16, 0x19, 0x10, 0x10, 0x10, 0x00 },   // 0x72, r
        { 0x07, 0x00, 0x00, 0x0f, 0x10, 0x0e, 0x01, 0x1e, 0x00 },   // 0x73, s
        { 0x07, 0x08, 0x08, 0x1c, 0x08, 0x08, 0x09, 0x06, 0x00 },   // 0x74, t
        { 0x07, 0x00, 0x00, 0x11, 0x11, 0x11, 0x13, 0x0d, 0x00 },   // 0x75, u
        { 0x07, 0x00, 0x00, 0x11, 0x11, 0x11, 0x0a, 0x04, 0x00 },   // 0x76, v
        { 0x07, 0x00, 0x00, 0x11, 0x11, 0x15, 0x15, 0x0a, 0x00 },   // 0x77, w
        { 0x07, 0x00, 0x00, 0x11, 0x0a, 0x04, 0x0a, 0x11, 0x00 },   // 0x78, x
        { 0x07, 0x00, 0x00, 0x11, 0x11, 0x0f, 0x01, 0x11, 0x0e },   // 0x79, y
        { 0x07, 0x00, 0x00, 0x1f, 0x02, 0x04, 0x08, 0x1f, 0x00 },   // 0x7a, z
        { 0x07, 0x06, 0x08, 0x08, 0x10, 0x08, 0x08, 0x06, 0x00 },   // 0x7b, {
        { 0x07, 0x04, 0x04, 0x04, 0x00, 0x04, 0x04, 0x04, 0x00 },   // 0x7c, |
        { 0x07, 0x0c, 0x02, 0x02, 0x01, 0x02, 0x02, 0x0c, 0x00 },   // 0x7d, }
        { 0x07, 0x08, 0x15, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00 },   // 0x7e, ~
        { 0x07, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x00 }    // 0x7f, DEL
};
//**************************************************************************************************

//**************************************************************************************************
void rtc_init(unsigned char sda, unsigned char scl) {
    Wire.begin(sda, scl);
    rtc_Write(controlREG, 0x00);
}
//**************************************************************************************************
// BCD Code
//**************************************************************************************************
unsigned char dec2bcd(unsigned char x) { //value 0...99
    unsigned char z, e, r;
    e = x % 10;
    z = x / 10;
    z = z << 4;
    r = e | z;
    return (r);
}
unsigned char bcd2dec(unsigned char x) { //value 0...99
    int z, e;
    e = x & 0x0F;
    z = x & 0xF0;
    z = z >> 4;
    z = z * 10;
    return (z + e);
}
//**************************************************************************************************
// RTC I2C Code
//**************************************************************************************************
unsigned char rtc_Read(unsigned char regaddress) {
    Wire.beginTransmission(DS3231_ADDRESS);
    Wire.write(regaddress);
    Wire.endTransmission();
    Wire.requestFrom((unsigned char) DS3231_ADDRESS, (unsigned char) 1);
    return (Wire.read());
}
void rtc_Write(unsigned char regaddress, unsigned char value) {
    Wire.beginTransmission(DS3231_ADDRESS);
    Wire.write(regaddress);
    Wire.write(value);
    Wire.endTransmission();
}
//**************************************************************************************************
unsigned char rtc_sekunde() {
    return (bcd2dec(rtc_Read(secondREG)));
}
unsigned char rtc_minute() {
    return (bcd2dec(rtc_Read(minuteREG)));
}
unsigned char rtc_stunde() {
    return (bcd2dec(rtc_Read(hourREG)));
}
unsigned char rtc_wochentag() {
    return (bcd2dec(rtc_Read(WTREG)));
}
unsigned char rtc_tag() {
    return (bcd2dec(rtc_Read(dateREG)));
}
unsigned char rtc_monat() {
    return (bcd2dec(rtc_Read(monthREG)));
}
unsigned char rtc_jahr() {
    return (bcd2dec(rtc_Read(yearREG)));
}
void rtc_sekunde(unsigned char sek) {
    rtc_Write(secondREG, (dec2bcd(sek)));
}
void rtc_minute(unsigned char min) {
    rtc_Write(minuteREG, (dec2bcd(min)));
}
void rtc_stunde(unsigned char std) {
    rtc_Write(hourREG, (dec2bcd(std)));
}
void rtc_wochentag(unsigned char wt) {
    rtc_Write(WTREG, (dec2bcd(wt)));
}
void rtc_tag(unsigned char tag) {
    rtc_Write(dateREG, (dec2bcd(tag)));
}
void rtc_monat(unsigned char mon) {
    rtc_Write(monthREG, (dec2bcd(mon)));
}
void rtc_jahr(unsigned char jahr) {
    rtc_Write(yearREG, (dec2bcd(jahr)));
}
//**************************************************************************************************
void rtc_set(tm* tt) {
    rtc_sekunde((unsigned char) tt->tm_sec);
    rtc_minute((unsigned char) tt->tm_min);
    rtc_stunde((unsigned char) tt->tm_hour);
    rtc_tag((unsigned char) tt->tm_mday);
    rtc_monat((unsigned char) tt->tm_mon + 1);
    rtc_jahr((unsigned char) tt->tm_year - 100);
    rtc_wochentag((unsigned char) tt->tm_wday);
}
//**************************************************************************************************
float rtc_temp() {
    float t = 0.0;
    unsigned char lowByte = 0;
    signed char highByte = 0;
    lowByte = rtc_Read(tempLSBREG);
    highByte = rtc_Read(tempMSBREG);
    lowByte >>= 6;
    lowByte &= 0x03;
    t = ((float) lowByte);
    t *= 0.25;
    t += highByte;
    return (t); // return temp value
}
//**************************************************************************************************
void rtc2mez() {

    unsigned short JaZiff;       //Jahresziffer
    unsigned short JhZiff = 6;   //Jahrhundertziffer für 20.Jahrhundert
    unsigned short TaZiff;       //Tagesziffer
    unsigned short WoTag;        //Wochentag
    unsigned short SJK = 0;      //Schaltjahreskorrektur
    unsigned short ZDiff;        //Zeitdifferenz UTC MEZ/MESZ
    unsigned short MoZiff[12] = { 0, 3, 3, 6, 1, 4, 6, 2, 5, 0, 3, 5 }; //Monatsziffer
    unsigned short Tage_Monat[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30,
            31 };
    unsigned short Jahr, Tag, Monat, Stunde, Minute, Sekunde;
    //RTC_setMonat(3);
    Jahr = rtc_jahr();
    if (Jahr > 99)
        Jahr = 0;
    Monat = rtc_monat();
    if (Monat > 12)
        Monat = 0;
    Tag = rtc_tag();
    if (Tag > 31)
        Tag = 0;
    Stunde = rtc_stunde();
    if (Stunde > 23)
        Stunde = 0;
    Minute = rtc_minute();
    if (Minute > 59)
        Minute = 0;
    Sekunde = rtc_sekunde();
    if (Sekunde > 59)
        Sekunde = 0;

    JaZiff = ((Jahr + Jahr / 4) % 7);
    TaZiff = (Tag % 7);
    if ((Jahr % 4) == 0)                          //Schaltjahr ?
    {
        Tage_Monat[1] = 29;                      //dann hat der Febr 29 Tage
        if (Monat < 3)
            SJK = 6;
        else
            SJK = 0;
    }
    WoTag = ((TaZiff + MoZiff[Monat - 1] + JhZiff + JaZiff + SJK) % 7);

    if (Monat < 3 || Monat > 10)
        ZDiff = 1; // keine Sommerzeit in Jan, Feb, Nov, Dez
    if (Monat > 3 && Monat < 10)
        ZDiff = 2; // Sommerz. in Apr, Mai, Jun, Jul, Aug, Sep
    if (Monat == 3) {
        ZDiff = 1;
        if (Tag > 24)     //Sommerzeit ab letzten Sonntag des Monats
        {
            if (Tag == 25) {
                if ((Tag + WoTag) < 26)
                    ZDiff = 2;
            }
            if (Tag == 26) {
                if ((Tag + WoTag) < 28)
                    ZDiff = 2;
            }
            if (Tag == 27) {
                if ((Tag + WoTag) < 30)
                    ZDiff = 2;
            }
            if (Tag == 28) {
                if ((Tag + WoTag) < 32)
                    ZDiff = 2;
            }
            if (Tag == 29) {
                if ((Tag + WoTag) < 34)
                    ZDiff = 2;
            }
            if (Tag == 30) {
                if ((Tag + WoTag) < 36)
                    ZDiff = 2;
            }
            if (Tag == 31) {
                if ((Tag + WoTag) < 38)
                    ZDiff = 2;
            }
            if ((ZDiff == 2) && (Stunde + 1 < 2) && (WoTag == 0))
                ZDiff = 1; //erst ab 02 Uhr
        }
    }
    if (Monat == 10) {
        ZDiff = 2;
        if (Tag > 24)     //Sommerzeit ab letzten Sonntag des Monats
        {
            if (Tag == 25) {
                if ((Tag + WoTag) < 26)
                    ZDiff = 1;
            }
            if (Tag == 26) {
                if ((Tag + WoTag) < 28)
                    ZDiff = 1;
            }
            if (Tag == 27) {
                if ((Tag + WoTag) < 30)
                    ZDiff = 1;
            }
            if (Tag == 28) {
                if ((Tag + WoTag) < 32)
                    ZDiff = 1;
            }
            if (Tag == 29) {
                if ((Tag + WoTag) < 34)
                    ZDiff = 1;
            }
            if (Tag == 30) {
                if ((Tag + WoTag) < 36)
                    ZDiff = 1;
            }
            if (Tag == 31) {
                if ((Tag + WoTag) < 38)
                    ZDiff = 1;
            }
            if ((ZDiff == 1) && (Stunde == 0) && (WoTag == 0))
                ZDiff = 2; //erst ab 02 Uhr
        }
    }
    Stunde = Stunde + ZDiff;
    if (Stunde > 23)       //Tageskorrektur
    {
        Stunde = Stunde - 24; //kann 0 oder 1 sein
        Tag = Tag + 1;
        WoTag = WoTag + 1;
        if (Tag > Tage_Monat[Monat - 1]) {
            Tag = 1;
            Monat = Monat + 1;
            if (Monat > 12) {
                Monat = 1;
                Jahr = Jahr + 1;
            }
        }
    }
    MEZ.WT = WoTag;          //So=0, Mo=1, Di=2 ...
    MEZ.sek1 = Sekunde % 10;
    MEZ.sek2 = Sekunde / 10;
    MEZ.sek12 = Sekunde;
    MEZ.min1 = Minute % 10;
    MEZ.min2 = Minute / 10;
    MEZ.min12 = Minute;
    MEZ.std1 = Stunde % 10;
    MEZ.std2 = Stunde / 10;
    MEZ.std12 = Stunde;
    MEZ.tag12 = Tag;
    MEZ.tag1 = Tag % 10;
    MEZ.tag2 = Tag / 10;
    MEZ.mon12 = Monat;
    MEZ.mon1 = Monat % 10;
    MEZ.mon2 = Monat / 10;
    MEZ.jahr12 = Jahr;
    MEZ.jahr1 = Jahr % 10;
    MEZ.jahr2 = Jahr / 10;
}

//*************************************************************************************************
const unsigned short InitArr[7][2] = { { 0x0C, 0x00 },    // display off
        { 0x00, 0xFF },    // no LEDtest
        { 0x09, 0x00 },    // BCD off
        { 0x0F, 0x00 },    // normal operation
        { 0x0B, 0x07 },    // start display
        { 0x0A, 0x04 },    // brightness
        { 0x0C, 0x01 }     // display on
};
//**************************************************************************************************
void max7219_init()  //all MAX7219 init
{
    unsigned short i, j;
    for (i = 0; i < 7; i++) {
        digitalWrite(CS, LOW);
        delayMicroseconds(1);
        for (j = 0; j < anzMAX; j++) {
            SPI.write(InitArr[i][0]);  //register
            SPI.write(InitArr[i][1]);  //value
        }
        digitalWrite(CS, HIGH);
    }
}
//**************************************************************************************************
void max7219_set_brightness(unsigned short br)  //brightness MAX7219
{
    unsigned short j;
    if (br < 16) {
        digitalWrite(CS, LOW);
        delayMicroseconds(1);
        for (j = 0; j < anzMAX; j++) {
            SPI.write(0x0A);  //register
            SPI.write(br);    //value
        }
        digitalWrite(CS, HIGH);
    }
}
//**************************************************************************************************
void helpArr_init(void)  //helperarray init
{
    unsigned short i, j, k;
    j = 0;
    k = 0;
    for (i = 0; i < anzMAX * 8; i++) {
        helpArrPos[i] = (1 << j);   //bitmask
        helpArrMAX[i] = k;
        j++;
        if (j > 7) {
            j = 0;
            k++;
        }
    }
}
//**************************************************************************************************
void clear_Display()   //clear all
{
    unsigned short i, j;
    for (i = 0; i < 8; i++)     //8 rows
    {
        digitalWrite(CS, LOW);
        delayMicroseconds(1);
        for (j = anzMAX; j > 0; j--) {
            LEDarr[j - 1][i] = 0;       //LEDarr clear
            SPI.write(i + 1);           //current row
            SPI.write(LEDarr[j - 1][i]);
        }
        digitalWrite(CS, HIGH);
    }
}
//*********************************************************************************************************
void rotate_90() // for Generic displays
{
    for (uint8_t k = anzMAX; k > 0; k--) {

        uint8_t i, j, m, imask, jmask;
        uint8_t tmp[8]={0,0,0,0,0,0,0,0};
        for (  i = 0, imask = 0x01; i < 8; i++, imask <<= 1) {
          for (j = 0, jmask = 0x01; j < 8; j++, jmask <<= 1) {
            if (LEDarr[k-1][i] & jmask) {
              tmp[j] |= imask;
            }
          }
        }
        for(m=0; m<8; m++){
            LEDarr[k-1][m]=tmp[m];
        }
    }
}
//**************************************************************************************************
void refresh_display() //take info into LEDarr
{
    unsigned short i, j;

#ifdef ROTATE_90
    rotate_90();
#endif

    for (i = 0; i < 8; i++)     //8 rows
    {
        digitalWrite(CS, LOW);
        delayMicroseconds(1);
        for (j = anzMAX; j > 0; j--) {
            SPI.write(i + 1);  //current row

#ifdef REVERSE_HORIZONTAL
            SPI.setBitOrder(LSBFIRST);      // bitorder for reverse columns
#endif

#ifdef REVERSE_VERTICAL
            SPI.write(LEDarr[j - 1][7-i]);
#else
            SPI.write(LEDarr[j - 1][i]);
#endif

#ifdef REVERSE_HORIZONTAL
            SPI.setBitOrder(MSBFIRST);      // reset bitorder
#endif
        }
        digitalWrite(CS, HIGH);
    }
}
//**************************************************************************************************
void char2Arr(unsigned short ch, int PosX, short PosY) { //characters into arr
    int i, j, k, l, m, o1, o2, o3, o4;  //in LEDarr
    PosX++;
    k = ch - 32;                        //ASCII position in font
    if ((k >= 0) && (k < 96))           //character found in font?
    {
        o4 = font1[k][0];                 //character width
        o3 = 1 << (o4 - 2);
        for (i = 0; i < o4; i++) {
            if (((PosX - i <= maxPosX) && (PosX - i >= 0))
                    && ((PosY > -8) && (PosY < 8))) //within matrix?
            {
                o1 = helpArrPos[PosX - i];
                o2 = helpArrMAX[PosX - i];
                for (j = 0; j < 8; j++) {
                    if (((PosY >= 0) && (PosY <= j)) || ((PosY < 0) && (j < PosY + 8))) //scroll vertical
                    {
                        l = font1[k][j + 1];
                        m = (l & (o3 >> i));  //e.g. o4=7  0zzzzz0, o4=4  0zz0
                        if (m > 0)
                            LEDarr[o2][j - PosY] = LEDarr[o2][j - PosY] | (o1);  //set point
                        else
                            LEDarr[o2][j - PosY] = LEDarr[o2][j - PosY] & (~o1); //clear point
                    }
                }
            }
        }
    }
}

//**************************************************************************************************
void timer50ms() {
    static unsigned int cnt50ms = 0;
    static unsigned int cnt1s = 0;
    static unsigned int cnt1h = 0;
    f_tckr50ms = true;
    cnt50ms++;
    if (cnt50ms == 20) {
        f_tckr1s = true; // 1 sec
        cnt1s++;
        cnt50ms = 0;
    }
    if (cnt1s == 3600) { // 1h
        cnt1h++;
        cnt1s = 0;
    }
    if (cnt1h == 24) { // 1d
        f_tckr24h = true;
        cnt1h = 0;
    }
}
//**************************************************************************************************
//
//The setup function is called once at startup of the sketch
void setup() {
    // Add your initialization code here

       pinMode(CS, OUTPUT);
    digitalWrite(CS, HIGH);
    Serial.begin(115200);
    //rtc.init(SDA, SCL);
    SPI.begin();
    helpArr_init();
    max7219_init();
    rtc_init(SDA, SCL);
    clear_Display();
    tckr.attach(0.05, timer50ms);    // every 50 msec
    tm* tt;
    if (tt != NULL)
        rtc_set(tt);
    else
        Serial.println("no timepacket received");
}
//**************************************************************************************************
// The loop function is called in an endless loop
void loop() {
    //Add your repeated code here
    unsigned int sek1 = 0, sek2 = 0, min1 = 0, min2 = 0, std1 = 0, std2 = 0;
    unsigned int sek11 = 0, sek12 = 0, sek21 = 0, sek22 = 0;
    unsigned int min11 = 0, min12 = 0, min21 = 0, min22 = 0;
    unsigned int std11 = 0, std12 = 0, std21 = 0, std22 = 0;
    signed int x = 0; //x1,x2;
    signed int y = 0, y1 = 0, y2 = 0;
    bool updown = false;
    unsigned int sc1 = 0, sc2 = 0, sc3 = 0, sc4 = 0, sc5 = 0, sc6 = 0;
    bool f_scrollend_y = false;
    unsigned int f_scroll_x = false;

    z_PosX = maxPosX;
    d_PosX = -8;
    //  x=0; x1=0; x2=0;

    refresh_display();
    updown = true;
    if (updown == false) {
        y2 = -9;
        y1 = 8;
    }
    if (updown == true) { //scroll  up to down
        y2 = 8;
        y1 = -8;
    }
    while (true) {
        yield();
        if (f_tckr24h == true) { //syncronisize RTC every day
            f_tckr24h = false;
            tm* tt;
            if (tt != NULL)
                rtc_set(tt);
            else
                Serial.println("no timepacket received");
        }
        if (f_tckr1s == true)        // flag 1sek
        {
            rtc2mez();
            sek1 = MEZ.sek1;
            sek2 = MEZ.sek2;
            min1 = MEZ.min1;
            min2 = MEZ.min2;
            std1 = MEZ.std1;
            std2 = MEZ.std2;
            y = y2;                 //scroll updown
            sc1 = 1;
            sek1++;
            if (sek1 == 10) {
                sc2 = 1;
                sek2++;
                sek1 = 0;
            }
            if (sek2 == 6) {
                min1++;
                sek2 = 0;
                sc3 = 1;
            }
            if (min1 == 10) {
                min2++;
                min1 = 0;
                sc4 = 1;
            }
            if (min2 == 6) {
                std1++;
                min2 = 0;
                sc5 = 1;
            }
            if (std1 == 10) {
                std2++;
                std1 = 0;
                sc6 = 1;
            }
            if ((std2 == 2) && (std1 == 4)) {
                std1 = 0;
                std2 = 0;
                sc6 = 1;
            }

            sek11 = sek12;
            sek12 = sek1;
            sek21 = sek22;
            sek22 = sek2;
            min11 = min12;
            min12 = min1;
            min21 = min22;
            min22 = min2;
            std11 = std12;
            std12 = std1;
            std21 = std22;
            std22 = std2;
            f_tckr1s = false;
            if (MEZ.sek12 == 45)
                f_scroll_x = true;
        } // end 1s
        if (f_tckr50ms == true) {
            f_tckr50ms = false;
            if (f_scroll_x == true) {
                z_PosX++;
                d_PosX++;
                if (d_PosX == 101)
                    z_PosX = 0;
                if (z_PosX == maxPosX) {
                    f_scroll_x = false;
                    d_PosX = -8;
                }
            }
            if (sc1 == 1) {
                if (updown == 1)
                    y--;
                else
                    y++;
                char2Arr(48 + sek12, z_PosX - 42, y);
                char2Arr(48 + sek11, z_PosX - 42, y + y1);
                if (y == 0) {
                    sc1 = 0;
                    f_scrollend_y = true;
                }
            }
            else
                char2Arr(48 + sek1, z_PosX - 42, 0);

            if (sc2 == 1) {
                char2Arr(48 + sek22, z_PosX - 36, y);
                char2Arr(48 + sek21, z_PosX - 36, y + y1);
                if (y == 0)
                    sc2 = 0;
            }
            else
                char2Arr(48 + sek2, z_PosX - 36, 0);

            char2Arr(':', z_PosX - 32, 0);

            if (sc3 == 1) {
                char2Arr(48 + min12, z_PosX - 25, y);
                char2Arr(48 + min11, z_PosX - 25, y + y1);
                if (y == 0)
                    sc3 = 0;
            }
            else
                char2Arr(48 + min1, z_PosX - 25, 0);

            if (sc4 == 1) {
                char2Arr(48 + min22, z_PosX - 19, y);
                char2Arr(48 + min21, z_PosX - 19, y + y1);
                if (y == 0)
                    sc4 = 0;
            }
            else
                char2Arr(48 + min2, z_PosX - 19, 0);

            char2Arr(':', z_PosX - 15 + x, 0);

            if (sc5 == 1) {
                char2Arr(48 + std12, z_PosX - 8, y);
                char2Arr(48 + std11, z_PosX - 8, y + y1);
                if (y == 0)
                    sc5 = 0;
            }
            else
                char2Arr(48 + std1, z_PosX - 8, 0);

            if (sc6 == 1) {
                char2Arr(48 + std22, z_PosX - 2, y);
                char2Arr(48 + std21, z_PosX - 2, y + y1);
                if (y == 0)
                    sc6 = 0;
            }
            else
                char2Arr(48 + std2, z_PosX - 2, 0);

            char2Arr(WT_arr[MEZ.WT][0], d_PosX - 5, 0);        //day of the week
            char2Arr(WT_arr[MEZ.WT][1], d_PosX - 11, 0);
            char2Arr(WT_arr[MEZ.WT][2], d_PosX - 17, 0);
            char2Arr(WT_arr[MEZ.WT][3], d_PosX - 23, 0);
            char2Arr(48 + MEZ.tag2, d_PosX - 27, 0);           //day
            char2Arr(48 + MEZ.tag1, d_PosX - 33, 0);
            char2Arr(M_arr[MEZ.mon12 - 1][0], d_PosX - 39, 0); //month
            char2Arr(M_arr[MEZ.mon12 - 1][1], d_PosX - 43, 0);
            char2Arr(M_arr[MEZ.mon12 - 1][2], d_PosX - 49, 0);
            char2Arr(M_arr[MEZ.mon12 - 1][3], d_PosX - 55, 0);
            char2Arr(M_arr[MEZ.mon12 - 1][4], d_PosX - 61, 0);
            char2Arr('2', d_PosX - 68, 0);                     //year
            char2Arr('0', d_PosX - 74, 0);
            char2Arr(48 + MEZ.jahr2, d_PosX - 80, 0);
            char2Arr(48 + MEZ.jahr1, d_PosX - 86, 0);

            refresh_display(); //alle 50ms
            if (f_scrollend_y == true) {
                f_scrollend_y = false;
            }
        } //end 50ms
        if (y == 0) {
            // do something else
        }
    }

}

Viel Spass beim nachbauen und bis zum nächsten Beitrag :)