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

#define buttonSetUp 3
#define buttonSetDown 4
#define buttonStart 2
#define buttonSet0 5

int counterSet          = 0;
int counter            = 0;

int buttonSetUp_StateCurrent     = LOW;
int buttonSetUp_StatePrevious    = LOW;

int buttonSetDown_StateCurrent   = LOW;
int buttonSetDown_StatePrevious  = LOW;

// int buttonStart_StateCurrent     = LOW;
// int buttonStart_StatePrevious    = LOW;

int buttonSet0_StateCurrent   = LOW;
int buttonSet0_StatePrevious  = LOW;


LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup(){  
  Serial.begin(115200);
  
  pinMode(buttonSetUp, INPUT_PULLUP);
  pinMode(buttonSetDown, INPUT_PULLUP);
  pinMode(buttonStart, INPUT_PULLUP);
  pinMode(buttonSet0, INPUT_PULLUP);

  lcd.init();   
  lcd.backlight(); 
}

void loop(){

buttonSetUp_StatePrevious = buttonSetUp_StateCurrent;
buttonSetUp_StateCurrent  = digitalRead(buttonSetUp);  
if (buttonSetUp_StatePrevious == LOW && buttonSetUp_StateCurrent == HIGH){
  counterSet++;
}

buttonSetDown_StatePrevious = buttonSetDown_StateCurrent;
buttonSetDown_StateCurrent  = digitalRead(buttonSetDown);  
if (buttonSetDown_StatePrevious == LOW && buttonSetDown_StateCurrent == HIGH){
  counterSet--;
}

int buttonStart_State = digitalRead(buttonStart);
if (buttonStart_State == LOW){
  counter++;
}

if (counter == counterSet){
  counter=0;
}

buttonSet0_StatePrevious = buttonSet0_StateCurrent;
buttonSet0_StateCurrent  = digitalRead(buttonSet0);  
if (buttonSet0_StatePrevious == LOW && buttonSet0_StateCurrent == HIGH){
  counter=0;
  lcd.clear();
}
  
  Serial.print(buttonSetUp_StateCurrent);
  Serial.print(" a ");
  Serial.print(buttonSetDown_StateCurrent);
  Serial.print(" b ");
  Serial.print(buttonStart_State);
  Serial.print(" c ");
  Serial.print(buttonSet0_StateCurrent);
  Serial.print(" d ");
  Serial.print(counterSet);
  Serial.print(" e ");
  Serial.println(counter);

  lcd.setCursor(0,0);
  String data   = String ("Target = ") + String (counterSet);
  lcd.print(data);

  lcd.setCursor(0,1);
  String data2  = String ("Plastik = ") + String (counter);
  lcd.print(data2);
  
  
  delay(10);
}