#define IO1 6
#define IO2 7
#define ADKEY1 8
#define ADKEY2 9

#define LID_SWITCH 5

#define LED 13

long last_trigger = 0;

void setup() {
  pinMode(IO1, INPUT);
  pinMode(IO2, INPUT);
  pinMode(ADKEY1, INPUT);
  pinMode(ADKEY2, INPUT);
  
  pinMode(LID_SWITCH, INPUT_PULLUP);
}

void loop() {
  if (digitalRead(LID_SWITCH) == HIGH) {
    if (last_trigger == 0 || last_trigger + 1000 < millis()) {
      digitalWrite(LED, HIGH);
      pinMode(ADKEY1, OUTPUT);
      delay(100);
      digitalWrite(LED, LOW);
      pinMode(ADKEY1, INPUT);
      last_trigger = millis();
      delay(100);
      /* Wait until box is closed */
      while(digitalRead(LID_SWITCH) != HIGH);
      
    }
  }
}