cons int RS =23, EN = 22, D4 = 21, D5 = 19, D6 = 18, D7 = 5;

//fungsi untuk set biner yang dikirim ke port data
void lcd_port(char a){
  digitalWrite(D4, LOW);
  digitalWrite(D5, LOW);
  digitalWrite(D6, LOW);
  digitalWrite(D7, LOW);
  if (a & 0x01) digitalWrite(D4, HIGH);
  if (a & 0x02) digitalWrite(D5, HIGH);
  if (a & 0b0100) digitalWrite(D6, HIGH);
  if (a & 0b1000) digitalWrite(D7, HIGH);
}

void lcd_cmd(char b){
  digitalWrite(RS, LOW);
  lcd_port(b);

  delayMicroseconds(40);
  digitalWrite(EN, HIGH);
  delayMicroseconds(40);
  digitalWrite(EN, LOW);
}

//fungsi LCD Clear membersihkan tampilan
void lcd_clear(){
  lcd_cmd(0b0000);
  lcd_cmd(0b0001);
}

//fungsi setting di awal
void lcd_init(){
  pinMode(RS, OUTPUT);
  pinMode(EN, OUTPUT);
  pinMode(D4, OUTPUT);
  pinMode(D5, OUTPUT);
  pinMode(D6, OUTPUT);
  pinMode(D7, OUTPUT);

  lcd_cmd(0b0010);
  lcd_cmd(0b0010);
  lcd_cmd(0b1000);

  lcd_cmd(0b0000);
  lcd_cmd(0b1110);

  lcd_cmd(0b0000);
  lcd_cmd(0b0110); 
}

void setup() {
  // put your setup code here, to run once:
  lcd_init();       //akses dan konfigurasi
  lcd_setCursor(0,0);
  lcd_clear();
  lcd_setCursor(0,0);


  digitalWrite(RS, HIGH);

  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}