LiquidCrystal lcd(12, 11, 5, 4, 3, 2);//rs e d4 d5 d6 d7
String tulisan = "Tadaa...";
void setup() {
  lcd.begin(16, 2);
  lcd.print(tulisan);
  Serial.begin(9600);
  delay(1000);
}

void loop() {
  if (Serial.available()){
    lcd.clear();
    while(Serial.available()>0){
      tulisan=Serial.readString();
      lcd.print(tulisan);
    }
  }
  // scroll 13 positions (string length) to the left
  // to move it offscreen left:
  for (int i = 0; i < tulisan.length(); i++) {
    // scroll one position left:
    lcd.scrollDisplayLeft();
    // wait a bit:
    delay(150);
  }

  // scroll 29 positions (string length + display length) to the right
  // to move it offscreen right:
  for (int i = 0; i < (tulisan.length()+16); i++) {
    // scroll one position right:
    lcd.scrollDisplayRight();
    // wait a bit:
    delay(150);
  }

  // scroll 16 positions (display length + string length) to the left
  // to move it back to center:
  for (int i = 0; i < 16; i++) {
    // scroll one position left:
    lcd.scrollDisplayLeft();
    // wait a bit:
    delay(150);
  }

  // delay at the end of the full loop:
  delay(1000);

}

SoftwareSerial hc05(11,12); //RX TX

String baca;

int t=0;
int dt=1;
void setup() {
  hc05.begin(9600);
  hc05.println("Tadaa...");  
  pinMode(13, OUTPUT);   
  pinMode(2, OUTPUT);  
}

void loop() {
  t+=dt;
  //hc05.print("nilai t = ");
  //hc05.println(t);
  while (hc05.available()){
    char c = hc05.read();
    baca += c;
  }
  if(baca.length()>0){
    hc05.println(baca);
    if (baca.indexOf("nyala")>=0){
      digitalWrite(2,HIGH);
    }
    if (baca.indexOf("mati")>=0){
      digitalWrite(2,LOW);
    }
  }

  baca="";
  if(t>=255){
    dt=-1;
    digitalWrite(13, LOW);
  } 
  if(t<=0){
    dt=1;
    digitalWrite(13,HIGH);
  }  
  analogWrite(3,t);
  delay(27);              
  }

unsigned long t0 = 0;
const long dt = 1000;       
void blinkNoD(int pin) {
  unsigned long t = millis();
  if(t - t0 >= dt) {
    t0 = t;
    led=!led;   
    digitalWrite(pin, led);
  }
} 

unsigned long t0 = 0;
const long dt = 1;       
void blinkNoD(int pin) {
  t0 += dt
  if(t0 >= 4) {
    t0 = 0;
    led=!led;   
    digitalWrite(pin, led);
  }
}