String odebraneDane = ""; 

void setup() {


  Serial.begin(9600);
digitalWrite(13, LOW);

}
 
void loop() {

  
 
//// Początek sprawdzania danych z portu

  
  if(Serial.available() > 0) { 
    odebraneDane = Serial.readStringUntil('\n'); 

  
                    
       
                    
                    
                     
                        
                    
                           if (odebraneDane == "1") { 
                          digitalWrite(3, HIGH); 
                          delay(1000);
                          digitalWrite(3, LOW); 
                        }
                            if (odebraneDane == "2") { 
                          digitalWrite(4, HIGH); 
                          delay(1000);
                          digitalWrite(4, LOW); 
                        }
                            if (odebraneDane == "3") { 
                          digitalWrite(5, HIGH); 
                          delay(1000);
                          digitalWrite(5, LOW); 
                        }
                            if (odebraneDane == "4") { 
                          digitalWrite(6, HIGH); 
                          delay(1000);
                          digitalWrite(6, LOW); 
                        }
                            if (odebraneDane == "5") { 
                          digitalWrite(7, HIGH); 
                          delay(1000);
                          digitalWrite(7, LOW); 
                        }
                            if (odebraneDane == "6") { 
                          digitalWrite(8, HIGH); 
                          delay(1000);
                          digitalWrite(8, LOW); 
                        }
                            if (odebraneDane == "7") { 
                          digitalWrite(9, HIGH); 
                          delay(1000);
                          digitalWrite(9, LOW); 
                        }
                            if (odebraneDane == "8") { 
                          digitalWrite(10, HIGH); 
                          delay(1000);
                          digitalWrite(10, LOW); 
                        }
                            if (odebraneDane == "9") { 
                          digitalWrite(11, HIGH); 
                          delay(1000);
                          digitalWrite(11, LOW); 
                        }
                            if (odebraneDane == "10") { 
                          digitalWrite(12, HIGH); 
                          delay(1000);
                          digitalWrite(12, LOW); 
                        }
                            if (odebraneDane == "11") { 
                          digitalWrite(2, HIGH); 
                          delay(1000);
                          digitalWrite(2, LOW); 
                        }
                    
      
  }
  }