#include <SoftwareSerial.h>

#define TX    1   // *** PB1, MISO
#define RX    4   // *** PB0, MOSI

char c;

SoftwareSerial mSerial(RX, TX);

const int ledPin = TX;
int digitalPin = TX;
int sensorValue = 0;
boolean digitalValue=0;

void setup() 
{
  pinMode(digitalPin,INPUT);
  pinMode(ledPin,OUTPUT);
  mSerial.begin(9600); // initialize serial communications at 9600 bps
}

void loop() 
{ 
  sensorValue = analogRead(RX); 
  digitalValue = digitalRead(TX); 
  mSerial.print("Sensor Value ");  
  mSerial.println(sensorValue); 
  mSerial.print("Digital Value ");  
  mSerial.println(digitalValue); 
  if( digitalValue==HIGH )//if the value of TX is HIGH
  {
    digitalWrite(RX,LOW);//turn off the led
  }
  if( digitalValue==LOW)//else
  {
    digitalWrite(RX,HIGH);//turn on the led
  }
  delay(1000);//delay 200ms
}