#include <SoftwareSerial.h>

// ***
// *** Define the RX and TX pins. Choose any two
// *** pins that are unused. Try to avoid D0 (pin 5)
// *** and D2 (pin 7) if you plan to use I2C.
// ***
#define RX    A0   // *** D3, Pin 2 
#define TX    A1   // *** D4, Pin 3

// ***
// *** Define the software based serial port. Using the
// *** name Serial so that code can be used on other
// *** platforms that support hardware based serial. On
// *** chips that support the hardware serial, just
// *** comment this line.
// ***
SoftwareSerial mySerial(RX, TX);
void setup() {
  mySerial.begin(9600);
}
/*
void loop() {
Serial.print(177);
delay(500);
}*/

void loop() {
  for (int i=0; i<100; i++) {
    mySerial.println(i);
    delay(500);
  }
}