// logika pemograman _ implementasi Membuat jam digital

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);

#define Led1    2
#define Up      14
#define Down    12
#define Enter   13

unsigned char Jam,Jam2,Menit,Menit2,Detik,Detik2;

void setup() {
  Serial.begin(115200);
  pinMode(Led1, OUTPUT);
  pinMode(Up, INPUT_PULLUP);
  pinMode(Down, INPUT_PULLUP);
  pinMode(Enter, INPUT_PULLUP);
  LCD.init();
  LCD.backlight();

  LCD.setCursor(2,0 );       // x = 2 baris , y=0 kolom
  LCD.print("TOLI 2A 2023");
  delay(1000);
  LCD.clear();
  
  LCD.setCursor(0,0 );       // x = 2 baris , y=0 kolom
  LCD.print("Sett: ");
  LCD.setCursor(0, 1);       // x = 0 baris , y=1 kolom
  LCD.print("Jam: ");
}
void loop() {
  Detik2++;
  if (Detik2==10) {
    Detik2 = 0;
    Detik++;
    if (Detik==6) {
      Detik = 0;
      Menit2++;
    }
  }
  if (Menit2==10) {
    Menit2 = 0;
    Menit++;
    if (Menit==6) {
      Menit = 0;
      Jam2++;
    }
  }
  if (Jam2==10) {
    Jam2 = 0;
    Jam++;
    }
    if (Jam==2) {
      Jam2<5;
      if (Jam2==4) {
        Jam = 0;
        Jam2 = 0;  
    }
    }
  digitalWrite(Led1, LOW);
  delay(500);
  digitalWrite(Led1, HIGH);
  delay(500);
  //----------------------------
  //set time
  if (digitalRead(Up) == LOW ) {
    Jam2++;
    if (Jam2==10) {
      Jam2 = 0;
      Jam++;
  }
  }
  if(digitalRead(Down)==LOW) {
    Jam2--;
    if (Jam2==0) {
      Jam2 = 9;
      if (Jam2==9) {
        Jam--;
      }
    }
  }
  //=== display jam =======
  LCD.setCursor(5,1);
  LCD.print(Jam);
  LCD.print(Jam2);
  LCD.print(":");
  LCD.print(Menit);
  LCD.print(Menit2);
  LCD.print(":");
  LCD.print(Detik);
  LCD.print(Detik2);
}