#define btn_act_low 2
#define btn_act_high 15

void setup() {
  // put your setup code here, to run once:
  pinMode(btn_act_low, INPUT);
  pinMode(btn_act_high, INPUT);

  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  int btn_act_low_state = digitalRead(btn_act_low);
  int btn_act_high_state = digitalRead(btn_act_high);

  if(btn_act_low_state == LOW){
    Serial.println("Button Active Low is pressed!");
    delay(200); //avoid debounce
  }

  if(btn_act_high_state == HIGH){
    Serial.println("Button Active High is pressed!");
    delay(200); //avoid debounce
  }
}