#include <SoftwareSerial.h>
#define rxPin 3
#define txPin 4
#define led 0
SoftwareSerial serial(rxPin, txPin);

void setup() {
  // put your setup code here, to run once:
  pinMode(rxPin, INPUT);
  pinMode(txPin, OUTPUT);
  pinMode(led, OUTPUT);     
  serial.begin(4800);
}

void loop() {
  // put your main code here, to run repeatedly:
  serial.println("1");
  delay(1000);
}