// 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,Menit,Detik;

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() {
  Detik++;
  if (Detik==60) {
    Detik = 0;
    Menit++;
  }
  if (Menit==60) {
    Menit = 0;
    Jam++;
  }
  if (Jam==24) {
    Jam = 0;
  }
  digitalWrite(Led1, LOW);
  delay(500);
  digitalWrite(Led1, HIGH);
  delay(500);
  //----------------------------
  //set time
  if (digitalRead(Up) == LOW ) {
    delay(1);
    Menit++;
    if (Menit==60) {
      Menit = 0;
      Jam++;
  }
  while (digitalRead(Up) == LOW) {}
  }
  //=== display jam =======
  LCD.setCursor(5,1);
  LCD.print(Jam);
  LCD.print(":");
  LCD.print(Menit);
  LCD.print(":");
  LCD.print(Detik); 
}