void setup(){
  Serial.begin(9600); 
  luzfondoOn();  
  irLineaUno();  
  Serial.print("Hola");  
  irLineaDos();  
  Serial.print("Bienvenido");   
  delay(100);
}

void loop(){}

void luzfondoOn(){       
    Serial.write(0x7C);
    Serial.write(157);  
    delay(5);
}

void luzfondoOff(){      
    Serial.write(0x7C);    
    Serial.write(128);   
    delay(5);
}

void irLineaUno(){       
   Serial.write(0xFE);  
   Serial.write(128);  
   delay(5);
}

void irLineaDos(){       
   Serial.write(0xFE); 
   Serial.write(192); 
   delay(5);
}

void irPosicion(int fila, int col) {
  Serial.write(0xFE);
  Serial.write((col + fila*64 + 128));  
  delay(5);
}

void borrarLCD(){        
   Serial.write(0xFE);
   Serial.write(0x01);   
   delay(5);
}


