// hobbyprojects
//  08-05-2020 38KHz_IR_Remote_Control_Transmitter.ino

#define toneOutput_pin 8

int key1 = 5;   // HR- 
int key2 = 4;   // HR+
int key3 = 6;   // MIN-
int key4 = 3;   // MIN+
int key5 = 7;   // SEC_RESET
int key6 = 2;   // Mode

int val;

void setup() 
{
  pinMode(key1,INPUT_PULLUP);    
  pinMode(key2,INPUT_PULLUP); 
  pinMode(key3,INPUT_PULLUP); 
  pinMode(key4,INPUT_PULLUP); 
  pinMode(key5,INPUT_PULLUP); 
  pinMode(key6,INPUT_PULLUP); 
  
  Serial.begin(1200);
  tone(toneOutput_pin, 38000);
}

void loop() {
    val = digitalRead(key1);    
    while (val == LOW)
  {
    Serial.print("1");
    delay(250);
    val = digitalRead(key1);      
  }

    val = digitalRead(key2);    
    while (val == LOW)
  {
    Serial.print("2");
    delay(250);
    val = digitalRead(key2);      
  }

    val = digitalRead(key3);    
    while (val == LOW)
  {
    Serial.print("3");
    delay(250);
    val = digitalRead(key3);      
  }

    val = digitalRead(key4);    
    while (val == LOW)
  {
    Serial.print("4");
    delay(250);
    val = digitalRead(key4);      
  }

    val = digitalRead(key5);    
    if (val == LOW)
  {
    Serial.print("5");
    delay(250);

    while (val == LOW)
    {
    val = digitalRead(key5);      
    }  
  }

    val = digitalRead(key6);    
    if (val == LOW)
  {
    Serial.print("6");
    delay(250);

    while (val == LOW)
    {
    val = digitalRead(key6);      
    }  
  }
  
}