Arduino

Publié le par merouane114

How to make a simple nice clock with programming arduino

This clock will be able to collect time data from a RTC Clock and to display them on a LCD.

Code explanation

#include <Wire.h>#include <LiquidCrystal_I2C.h>#include <ds3231.h>struct ts t;LiquidCrystal_I2C lcd(0x27,20,4);void setup(){lcd.init();lcd.backlight();Serial.begin(9600);Wire.begin();DS3231_init(DS3231_INTCN);t.hour=8;t.min=30;t.sec=0;t.mday=23;t.mon=12;t.year=2019;DS3231_set(t);if(t.hour<13){if(t.hour>0){lcd.setCursor(3,0);lcd.print("Good Morning !");}}if(t.hour<23){if(t.hour>19){lcd.setCursor(4,0);lcd.print("Good Night !");}}if(t.hour<20){if(t.hour>12){lcd.setCursor(2,0);lcd.print("Good Afternoon !");}}}void loop(){DS3231_get(&t);lcd.setCursor(6,2);lcd.print(t.hour);lcd.setCursor(8,2);lcd.print(":");lcd.setCursor(9,2);lcd.print(t.min);lcd.setCursor(11,2);lcd.print(":");lcd.setCursor(12,2);lcd.print(t.sec);if(t.mon==1){lcd.setCursor(5,1);lcd.print("Jan ");}if(t.mon==2){lcd.setCursor(5,1);lcd.print("Feb ");}if(t.mon==3){lcd.setCursor(5,1);lcd.print("Mar ");}if(t.mon==4){lcd.setCursor(5,1);lcd.print("Apr ");}if(t.mon==5){lcd.setCursor(5,1);lcd.print("May ");}if(t.mon==6){lcd.setCursor(5,1);lcd.print("Jun ");}if(t.mon==7){lcd.setCursor(5,1);lcd.print("Jul ");}if(t.mon==8){lcd.setCursor(5,1);lcd.print("Aug ");}if(t.mon==9){lcd.setCursor(5,1);lcd.print("Sep ");}if(t.mon==10){lcd.setCursor(5,1);lcd.print("Oct ");}if(t.mon==11){lcd.setCursor(5,1);lcd.print("Nov ");}if(t.mon==12){lcd.setCursor(5,1);lcd.print("Dec ");}lcd.setCursor(9,1);lcd.print(t.mday);lcd.setCursor(12,1);lcd.print(t.year);}

Firstly, we define all libraries and we realize some functions necessary to set the clock and the LCD :

#include <Wire.h>#include <LiquidCrystal_I2C.h>#include <ds3231.h>struct ts t;LiquidCrystal_I2C lcd(0x27,20,4);

Then, we initialize all elements of the clock :

lcd.init();lcd.backlight();Serial.begin(9600);Wire.begin();DS3231_init(DS3231_INTCN);t.hour=8;t.min=30;t.sec=0;t.mday=23;t.mon=12;t.year=2019;DS3231_set(t);

We say if it’s the Morning, the night or the afternoon ( between midnight and 1PM : Morning / between 7PM and 11PM : the Night / between midday and 8PM : the Afternoon ) :

if(t.hour<13){if(t.hour>0){lcd.setCursor(3,0);lcd.print("Good Morning !");}}if(t.hour<23){if(t.hour>19){lcd.setCursor(4,0);lcd.print("Good Night !");}}if(t.hour<20){if(t.hour>12){lcd.setCursor(2,0);lcd.print("Good Afternoon !");}}

In the void loop, we set a command which give us informations coming from the RTC Clock :

void loop(){  DS3231_get(&t);

Then we draw the last line of our clock. The last line is composed of the hour/minute/seconds :

lcd.setCursor(6,2); lcd.print(t.hour); lcd.setCursor(8,2); lcd.print(":"); lcd.setCursor(9,2); lcd.print(t.min); lcd.setCursor(11,2); lcd.print(":"); lcd.setCursor(12,2); lcd.print(t.sec);

Then we define that January is t.month = 01, February is t.month = 02, etc…

if(t.mon==1){ lcd.setCursor(5,1); lcd.print("Jan "); }  if(t.mon==2){ lcd.setCursor(5,1); lcd.print("Feb "); }  if(t.mon==3){ lcd.setCursor(5,1); lcd.print("Mar "); }   if(t.mon==4){ lcd.setCursor(5,1); lcd.print("Apr "); }  if(t.mon==5){ lcd.setCursor(5,1); lcd.print("May "); }   if(t.mon==6){ lcd.setCursor(5,1); lcd.print("Jun "); }   if(t.mon==7){ lcd.setCursor(5,1); lcd.print("Jul "); }   if(t.mon==8){ lcd.setCursor(5,1); lcd.print("Aug "); }   if(t.mon==9){ lcd.setCursor(5,1); lcd.print("Sep "); }   if(t.mon==10){ lcd.setCursor(5,1); lcd.print("Oct "); }   if(t.mon==11){ lcd.setCursor(5,1); lcd.print("Nov "); }   if(t.mon==12){ lcd.setCursor(5,1); lcd.print("Dec "); }

And finally we write the 2nd line of our clock ( month/day/year ) :

lcd.setCursor(9,1); lcd.print(t.mday); lcd.setCursor(12,1); lcd.print(t.year);}

First line :

Second line :

Third line :

Connections

CODE

RTC ClockArduino
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
#include <ds3231.h>
 
struct ts t; 
LiquidCrystal_I2C lcd(0x27,20,4);  
void setup()
{
  lcd.init();
  lcd.backlight();
  
  Serial.begin(9600);
  Wire.begin();
  DS3231_init(DS3231_INTCN);
  t.hour=8; 
  t.min=30;
  t.sec=0;
  t.mday=23;
  t.mon=12;
  t.year=2019;
  DS3231_set(t);

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