/*
  The circuit:
 * LCD RS pin to digital pin 12
 * LCD Enable pin to digital pin 11
 * LCD D4 pin to digital pin 5
 * LCD D5 pin to digital pin 4
 * LCD D6 pin to digital pin 3
 * LCD D7 pin to digital pin 2
 * LCD R/W pin to ground
 * LCD VSS pin to ground
 * LCD VCC pin to 5V
 * 10K resistor:
 * ends to +5V and ground
 * wiper to LCD VO pin (pin 3)
*/

#include <LiquidCrystal.h>

const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

#define led1Pin       8
#define led2Pin       9

#define SW1           6
#define SW2           7

#define buzzer        10

int i, j;

void setup() {
  lcd.begin(16, 2);

  pinMode(led1Pin, OUTPUT);
  pinMode(led2Pin, OUTPUT);
  pinMode(SW1, INPUT);
  pinMode(SW2, INPUT);
  pinMode(buzzer, OUTPUT);

  lcd.setCursor(0, 0);
  lcd.print(" KELAS EMBEDDED ");
  lcd.setCursor(0, 1);
  lcd.print("     SYSTEM     ");
  tone(buzzer, 2500);
  delay(1000);
  noTone(buzzer);
  lcd.clear();
}

void loop() {
  if(digitalRead(SW1) == HIGH){
    tone(buzzer, 3500);
    while(digitalRead(SW1) == HIGH){}
    noTone(buzzer);
    //delay(300);
    i++;
    if(i > 1) i = 0;
  }
  if(i == 1){
    digitalWrite(led1Pin, HIGH);
    lcd.setCursor(9, 0);
    lcd.print("ON ");
  }else{
    digitalWrite(led1Pin, LOW);
    lcd.setCursor(9, 0);
    lcd.print("OFF");
  }

  if(digitalRead(SW2) == HIGH){
    tone(buzzer, 3500);
    while(digitalRead(SW2) == HIGH){}
    noTone(buzzer);
    //delay(300);
    j++;
    if(j > 1) j = 0;
  }
  if(j == 1){
    digitalWrite(led2Pin, HIGH);
    lcd.setCursor(9, 1);
    lcd.print("ON ");
  }else{
    digitalWrite(led2Pin, LOW);
    lcd.setCursor(9, 1);
    lcd.print("OFF");
  }

  lcd.setCursor(0, 0);
  lcd.print("Lampu1 : ");
//  lcd.print(digitalRead(led1Pin));
  lcd.setCursor(0, 1);
  lcd.print("Lampu2 : ");
//  lcd.print(digitalRead(led2Pin));
}