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

int LED1 = 2;
int LED2 = 3;
int LED3 = 4;
int LED4 = 5;

String s;

void setup() 
{
  Serial.setTimeout(50);  
  Serial.begin(1200);  
    
  pinMode(LED1,OUTPUT);  
  pinMode(LED2,OUTPUT);  
  pinMode(LED3,OUTPUT);  
  pinMode(LED4,OUTPUT);  
}

void loop() 
{
  if(Serial.available()) 
  {
    s = Serial.readString();

  if (s == "1")
  {  
  digitalWrite(LED1,HIGH);  
  }

  if (s == "2")
  {  
  digitalWrite(LED1,LOW);  
  }  

  if (s == "3")
  {  
  digitalWrite(LED2,HIGH);  
  }

  if (s == "4")
  {  
  digitalWrite(LED2,LOW);  
  }

  if (s == "5")
  {
  digitalWrite(LED3, !digitalRead(LED3));  
  }

  if (s == "6")
  {  
  digitalWrite(LED4, !digitalRead(LED4)); 
  }
}   
}