Project I - 10. Digital Calendar Display on LCD (Arduino Based)

Digital Calendar Display on LCD

Arduino will read RTC module data (Real Time Clock). The data generates hours, minutes, days, dates, months and years and then displayed on LCD 2x16. Four additional button are added to help for seting the time without uploading program continuesly.

Hardware Requirement

LCD 2X16 Module
RTC DS1307 Module
4 Push Button
Arduino UNO
Power supply +5 Volt

Push Button (Source) RTC DS1307 (Source)

Block diagram

Schematic

Arduino - LCD Wiring

Arduino - RTC Wiring

Arduino - Button Wiring

Source Code/Sketch

#include <LiquidCrystal.h>
#include "Wire.h"
#define DS1307_ADDRESS 0x68
byte zero = 0x00;
LiquidCrystal lcd(2, 3, 4, 5, 6, 7);
int menu;
byte second ,minute,hour, weekDay;
byte monthDay,month,year;
boolean up=false;
boolean down=false;
void setup(){
pinMode(8,INPUT);
pinMode(9,INPUT);
pinMode(10,INPUT);
pinMode(11,INPUT);
digitalWrite(8,HIGH);
digitalWrite(9,HIGH);
digitalWrite(10,HIGH);
digitalWrite(11,HIGH);
Wire.begin();
lcd.begin(16, 2);
lcd.setCursor(0,0);
lcd.print("Kalender digital");
delay(2000);
lcd.clear();
}
void loop(){
bacaRTC();
lcdDisplay();
cekTombol();
delay(1000);
}
byte decToBcd(byte val){
return ( (val/10*16) + (val%10) );
}
byte bcdToDec(byte val) {
return ( (val/16*10) + (val%16) );
}
void bacaRTC(){
Wire.beginTransmission(DS1307_ADDRESS);
Wire.write(zero);
Wire.endTransmission();
Wire.requestFrom(DS1307_ADDRESS, 7);
second = bcdToDec(Wire.read());
minute = bcdToDec(Wire.read());
hour = bcdToDec(Wire.read() & 0b111111);
weekDay = bcdToDec(Wire.read());
monthDay = bcdToDec(Wire.read());
month = bcdToDec(Wire.read());
year = bcdToDec(Wire.read());
}
void cekTombol(){
if (digitalRead(8)==0){
lcd.clear();
lcd.print("Seting RTC");
delay(2000);
menu++;
lcd.clear();
lcdDisplay();
lcd.blink();
do{
//------------------------next
if (digitalRead(8)==0){
delay(300);
menu++;
}
//--------------------back
else if (digitalRead(9)==0){
delay(300);
if (menu > 1){
menu--;
}
}
//---------------------------up
else if(digitalRead(10)==0){
delay(200);
up=true;
}
//----------------------------down
else if(digitalRead(11)==0){
delay(200);
down=true;
}
//-------------------------edit data jam
if (menu==1){
if (up==true && hour < 24){
hour++;
lcdDisplay();
}
else if (down==true && hour>0){
hour--;
lcdDisplay();
}
up=false;
down=false;
if (hour<10){
lcd.setCursor(5,0);
}
else {
lcd.setCursor(6,0);
}
}
//-------------------------edit data menit
else if (menu==2){
if (up==true && minute < 59){
minute++;
lcdDisplay();
}
else if (down==true && minute>0){
minute--;
lcdDisplay();
}
up=false;
down=false;
if (hour<10 && minute<10){
lcd.setCursor(7,0);
}
else if (hour<10 && minute>9){
lcd.setCursor(8,0);
}
else if (hour>9 && minute<10){
lcd.setCursor(8,0);
}
else if (hour>9 && minute>9){
lcd.setCursor(9,0);
}
}
//-------------------------edit data detik
else if (menu==3){
if (up==true && second < 59){
second++;
lcdDisplay();
}
else if (down==true && second>0){
second--;
lcdDisplay();
}
up=false;
down=false;
if (hour<10 && minute<10 && second<10){
lcd.setCursor(9,0);
}
else if (hour<10 && minute<10 && second>9){
lcd.setCursor(10,0);
}
else if (hour<10 && minute>9 && second<10){
lcd.setCursor(10,0);
}
else if (hour>9 && minute<10 && second<10){
lcd.setCursor(10,0);
}
else if (hour<10 && minute>9 && second>9){
lcd.setCursor(11,0);
}
else if (hour>9 && minute>9 && second<10){
lcd.setCursor(11,0);
}
else if (hour>9 && minute<10 && second>9){
lcd.setCursor(11,0);
}
else if (hour>9 && minute>9 && second>9){
lcd.setCursor(12,0);
}
}
//-------------------------edit data hari
else if (menu==4){
if (up==true && weekDay < 6){
weekDay++;
lcdDisplay();
}
else if (down==true && weekDay>0){
weekDay--;
lcdDisplay();
}
up=false;
down=false;
lcd.setCursor(0,1);
}
//-------------------------edit data tanggal
else if (menu==5){
if (up==true && monthDay < 31){
monthDay++;
lcdDisplay();
}
else if (down==true && monthDay>1){
monthDay--;
lcdDisplay();
}
up=false;
down=false;
if (monthDay<10){
lcd.setCursor(5,1);
}
else {
lcd.setCursor(6,1);
}
}
//-------------------------edit data bulan
else if (menu==6){
if (up==true && month < 12){
month++;
lcdDisplay();
}
else if (down==true && month>1){
month--;
lcdDisplay();
}
up=false;
down=false;
if (monthDay<10 && month<10){
lcd.setCursor(7,1);
}
else if (monthDay<10 && month>9){
lcd.setCursor(8,1);
}
else if (monthDay>9 && month<10){
lcd.setCursor(8,1);
}
else if (monthDay>9 && month>9){
lcd.setCursor(9,1);
}
}
//-------------------------edit data tahun
else if (menu==7){
if (up==true && year < 99){
year++;
lcdDisplay();
}
else if (down==true && year>0){
year--;
lcdDisplay();
}
up=false;
down=false;
if (monthDay<10 && month<10 && year<10){
lcd.setCursor(11,1);
}
else if (monthDay<10 && month<10 && year>9){
lcd.setCursor(12,1);
}
else if (monthDay<10 && month>9 && year<10){
lcd.setCursor(12,1);
}
else if (monthDay>9 && month<10 && year<10){
lcd.setCursor(12,1);
}
else if (monthDay<10 && month>9 && year>9){
lcd.setCursor(13,1);
}
else if (monthDay>9 && month>9 && year<10){
lcd.setCursor(13,1);
}
else if (monthDay>9 && month<10 && year>9){
lcd.setCursor(13,1);
}
else if (monthDay>9 && month>9 && year>9){
lcd.setCursor(14,1);
}
}
//-------------------------simpan data RTC
if (menu==8)setingRTC();
}
while(menu < 8);
lcd.clear();
lcd.noBlink();
lcd.print("Seting RTC OK!");
delay(1000);
lcd.clear();
menu=0;
}
}
void lcdDisplay(){
lcd.setCursor(0,0);
lcd.print("Jam:");
lcd.setCursor(5,0);
lcd.print(hour);
lcd.print(":");
lcd.print(minute);
lcd.print(":");
lcd.print(second);
lcd.print(" ");
lcd.setCursor(0,1);
hari();
lcd.setCursor(5,1);
lcd.print(monthDay);
lcd.print("/");
lcd.print(month);
lcd.print("/20");
lcd.print(year);
lcd.print(" ");
}
void hari(){
if (weekDay==0){
lcd.print("Ming, ");
}
else if (weekDay==1){
lcd.print("Sen,");
}
else if (weekDay==2){
lcd.print("Sel,");
}
else if (weekDay==3){
lcd.print("Rab,");
}
else if (weekDay==4){
lcd.print("Kam,");
}
else if (weekDay==5){
lcd.print("Jum,");
}
else if (weekDay==6){
lcd.print("Sab,");
}
}
void setingRTC(){
Wire.beginTransmission(DS1307_ADDRESS);
Wire.write(zero); //stop RTC
Wire.write(decToBcd(second));
Wire.write(decToBcd(minute));
Wire.write(decToBcd(hour));
Wire.write(decToBcd(weekDay));
Wire.write(decToBcd(monthDay));
Wire.write(decToBcd(month));
Wire.write(decToBcd(year));
Wire.write(zero); //start
Wire.endTransmission();
}

How it Works
1. Connect the Arduino with Peripherals needed
2. Plug in the Power Source on the device
3. Compile and upload the script program above to your arduino
4. First look on lcd