/* Hello Wokwi!

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  lcd.init();
  lcd.backlight();
  lcd.setCursor(1, 0);
  lcd.print("Hello, Wokwi!");
}*/

int AKL=2;
int CLK=3;
int DTA=4;
int TIME=1000;

void setup(){
  pinMode(CLK, OUTPUT);
  pinMode(DTA, OUTPUT);
  digitalWrite(AKL, LOW);
  digitalWrite(CLK, HIGH);
  digitalWrite(DTA, HIGH);
}

void loop() {
  
  delay(TIME*2);

  // start condition
  start(DTA,CLK,TIME);

  // data transmission
  // bit 1 (MSB)
  writeZero(DTA,CLK,TIME);
  // bit 2
  writeZero(DTA,CLK,TIME);
  // bit 3
  writeOne(DTA,CLK,TIME);
  // bit 4
  writeZero(DTA,CLK,TIME);
  // bit 5
  writeZero(DTA,CLK,TIME);
  // bit 6
  writeOne(DTA,CLK,TIME);
  // bit 7
  writeOne(DTA,CLK,TIME);
  // bit 8 (LSB)
  writeOne(DTA,CLK,TIME);

  //stop condition
  stop(DTA,CLK,TIME,AKL);
}

void start(int d,int c,int t){
  digitalWrite(d, LOW);
  delay(t/6);
  digitalWrite(c, LOW);
  delay(t);
}

void stop(int d,int c,int t,int a){
  int temp;
  pinMode(d, INPUT);
  delay(t/6);
  digitalWrite(c, HIGH);
  delay(t/3);
  temp=digitalRead(d);
  if(temp==1){
    digitalWrite(a, LOW);
  }else{digitalWrite(a, HIGH);}
  delay(t/6);
  delay(t/3);
  digitalWrite(a, LOW);
  pinMode(d, OUTPUT);
}

void writeOne(int d,int c,int t){
  digitalWrite(d, HIGH);
  delay(t/6);
  digitalWrite(c, HIGH);
  delay(t/3);
  digitalWrite(c, LOW);
  delay(t/6);
  digitalWrite(d, LOW);
  delay(t/3);
}

void writeZero(int d,int c,int t){
  delay(t/6);
  digitalWrite(c, HIGH);
  delay(t/3);
  digitalWrite(c, LOW);
  delay(t/6);
  delay(t/3);
}