#define BTN_PIN A0

#define BTN1    1023
#define BTN2    911
#define BTN3    797
#define BTN4    683
#define BTN5    572
#define BTN6    461
#define BTN7    333
#define BTN8    222

bool isAnalogBtnPressed(int analogVal, int btnValue) {
  return abs(btnValue - analogVal) <= 20;
}


int odczytanaWartosc = 0;

void setup() {
  pinMode(BTN_PIN, INPUT);
  Serial.begin(9600);
}

void loop() {
  int btnData = analogRead(BTN_PIN);
  if(isAnalogBtnPressed(btnData, BTN1)) {
    Serial.println("Wcisnieto przycisk 1");
  } else if(isAnalogBtnPressed(btnData, BTN2)) {
    Serial.println("Wcisnieto przycisk 2");
  }  else if(isAnalogBtnPressed(btnData, BTN3)) {
    Serial.println("Wcisnieto przycisk 3");
  }  else if(isAnalogBtnPressed(btnData, BTN4)) {
    Serial.println("Wcisnieto przycisk 4");
  }
  else if(isAnalogBtnPressed(btnData, BTN5)) {
    Serial.println("Wcisnieto przycisk 5");
  }  else if(isAnalogBtnPressed(btnData, BTN6)) {
    Serial.println("Wcisnieto przycisk 6");
  }  else if(isAnalogBtnPressed(btnData, BTN7)) {
    Serial.println("Wcisnieto przycisk 7");
  }
  else if(isAnalogBtnPressed(btnData, BTN8)) {
    Serial.println("Wcisnieto przycisk 8");
  }
  delay(100);
}