#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

int lastButtonState = LOW;
int currentButtonState;
int value = -1;
int PIDPins[] = {13,12,14,27,26,25,33,32,15};//{15,32,33,25,26,27,14,12,13};
int PIDVals[8];
int number = 0 ;

void setup() {
  lcd.init();
  lcd.backlight();
  Serial.begin(9600);
  pinMode(13, INPUT_PULLUP);
  pinMode(12, INPUT_PULLUP);
  pinMode(14, INPUT_PULLUP);
  pinMode(27, INPUT_PULLUP);
  pinMode(26, INPUT_PULLUP);
  pinMode(25, INPUT_PULLUP);
  pinMode(33, INPUT_PULLUP);
  pinMode(32, INPUT_PULLUP);
  pinMode(15, INPUT_PULLDOWN);
  Wire.begin();
}

void loop() {

  currentButtonState = digitalRead(15);
  if (currentButtonState == HIGH && lastButtonState == LOW) {
    for (int i=0; i<8;i++){
      PIDVals[i]=digitalRead(PIDPins[i]);
  }
    updateLCD();
    lcd.setCursor(1, 0);
  int binNumber = number;

  String myString = String(binNumber,BIN);
  switch (myString.length()) {
  case 1:
    lcd.print("0000000");
    lcd.print(myString);
    break;
  case 2:
    lcd.print("000000");
    lcd.print(myString);
    break;
  case 3:
    lcd.print("00000");
    lcd.print(myString);
    break;
  case 4:
    lcd.print("0000");
    lcd.print(myString);
    break;
  case 5:
    lcd.print("000");
    lcd.print(myString);
    break;
  case 6:
    lcd.print("00");
    lcd.print(myString);
    break;

  case 7:
    lcd.print("0");
    lcd.print(myString);
    break;

  default:
    lcd.print(myString);
    break;
}

  lcd.print("=0x");
  lcd.print(binNumber,HEX);

    
  }
  number =0 ;
  lastButtonState = currentButtonState;
}

void updateLCD() {
  
  for (int i=0; i<8;i++){
    // lcd.setCursor(i,0);
    // lcd.print(PIDVals[i]);
    number = number + (PIDVals[i]*pow(2,i));
  }
  Serial.println(number);
  
}