const char NO_KEY = 0;

class AbstractKeypad {
  public:
    AbstractKeypad() {      
    };

    void Trigger(char key) {
      nextKey = key;
      return true;
    };

    void Update() {
      lastKey = currentKey;
      currentKey = nextKey;
      nextKey = NO_KEY;
    };

    char getKey() {
      return currentKey;
    };

  private:
    char currentKey;
    char lastKey;
    char nextKey;
};

AbstractKeypad keypad();

char cc;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);

  Serial.println(F("Start"));
}
/*
  void kSerial(){
  if(Serial.available()>0){
    char c = Serial.read();
      if(c!='\n'){
        if(Serial.read()=='\n'){
          keypad.triggerKeyPress(c);

          Serial.print(F("Trigger Key '"));
          Serial.print(c);
          Serial.println(F("'"));
      }
    }

    while(Serial.available()) Serial.read();
  }
  }
*/
void readSerial() {

  if (Serial.available() > 0) {

    char c = Serial.read();

    if (c != '\n') {

      if (Serial.read() == '\n') {
        cc = c;

       // keypad.triggerKeyPress(c);
      }
      
    }

    while (Serial.available() > 0) Serial.read();

  }


 // 
}

void onInput(char c) {

  if (c != 0) {
        Serial.print(F("Trigger Key '"));
        Serial.print(c);
        Serial.println(F("'"));

       // keypad.triggerKeyPress(c);
    }
  cc = 0;
  }

 // 

void loop() {
  // put your main code here, to run repeatedly:

  

  readSerial();

  onInput(cc);
  
  delay(100);
}