#include <SoftwareSerial.h>
#define RX    0   
#define TX    1  
SoftwareSerial MySerial(RX, TX);
   
char serialData;
int pin = 8;
      
void setup() 
{
pinMode(pin, OUTPUT);
MySerial.begin(9600);
}
         
void loop() 
{
  if (MySerial.available() > 0)
  { 
    serialData = MySerial.read();
    MySerial.print(serialData);
              
    if (serialData == '1') 
    {digitalWrite(pin, HIGH);}
                
    else if (serialData == '0')
    {digitalWrite( pin, LOW);}
  }
}