#include <SoftwareSerial.h>
#define DEVICE_ID  '2'
#define ledPin 8

const int rx=0;
const int tx=1;
char serialData;

SoftwareSerial mySerial(rx,tx);

void setup() {
  // put your setup code here, to run once:
  pinMode(ledPin, OUTPUT);
  mySerial.begin(9600);
  digitalWrite(ledPin, LOW);
}

void loop() {
  if(mySerial.available()>0){
    serialData = mySerial.read();
    if (serialData == DEVICE_ID){
      while (!(mySerial.available()>0)){} //waiting for the command data
      serialData = mySerial.read();
      for (int i=0; i<(serialData-48); i++){  // ASCII to Decimal
        delay(300); 
        digitalWrite(ledPin, HIGH);
        delay(300);
        digitalWrite(ledPin, LOW);
      } 
    }
    mySerial.println(2); //DEVICE_ID
  }
  delay(250);
}