#include <SoftwareSerial.h>
SoftwareSerial mySerial(2,3); // RX, TX

const char node = '[Replace with node number]'; // network address
const int ledPin = 1;  // the number of the LED pin

int incomingByte;

void setup() {
  mySerial.begin(9600);
  pinMode(ledPin, OUTPUT);
  pinMode(3, INPUT); 
}

void loop() {
  if (mySerial.available() > 0) {
    digitalWrite(ledPin, HIGH);
    delay(200);
    digitalWrite(ledPin, LOW);
    delay(200);
    incomingByte = mySerial.read();
    if (incomingByte == node) {
      digitalWrite(ledPin, HIGH);    
      pinMode(3, OUTPUT); // open line to write
      mySerial.print("node ");  
      mySerial.println(node);  
      pinMode(3, INPUT);
      delay(200);
      digitalWrite(ledPin, LOW);   
    }
  }
}