#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);

#define pinLed_Kuning 19
#define pinLed_Hijau 18
#define pinPB_Kuning  14
#define pinPB_Hijau   12
#define pinBuzzer     5
unsigned char Status_PB_Hijau, Status_PB_Kuning;
unsigned char Counter;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(pinPB_Hijau, INPUT);
  pinMode(pinPB_Kuning, INPUT);
  pinMode(pinLed_Kuning, OUTPUT);
  pinMode(pinLed_Hijau,  OUTPUT);
  pinMode(pinBuzzer, OUTPUT);
  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0); // x dan y
  LCD.print("   TNU 29 ");
  LCD.setCursor(0, 1);
  LCD.print("Counter: ");

}
void loop() {
  
  // put your main code here, to run repeatedly:
  Status_PB_Hijau = digitalRead(pinPB_Hijau);
  if (Status_PB_Hijau == 1){
    Counter++;  // Counter = Counter+1;
     LCD.setCursor(8, 1);
    LCD.print(Counter);
    while (Status_PB_Hijau == 1){
        Status_PB_Hijau = digitalRead(pinPB_Hijau);
        Serial.println("terjebak...");
        delay(100);
    }
  }
   Status_PB_Kuning = digitalRead(pinPB_Kuning);
  if (Status_PB_Kuning == 1){
    Counter--;  // Counter = Counter+1;
     LCD.setCursor(8, 1);
    LCD.print(Counter);
  }
  //==== alarm ===
  if (Counter == 10){
    for (i=0;i<10;i++)
    { Serial.print(i);
      Serial.print(" ");
      digitalWrite(pinBuzzer, HIGH);
      tone(pinBuzzer, 100);
      delay(1000);
      digitalWrite(pinBuzzer, LOW);
      noTone(pinBuzzer);
      delay(1000);
    }

  }
  delay(100); // this speeds up the simulation
}